Simplified Tools

Tools

1,316 tools

List of available tools
Devops Canary Deployment Planner Plan canary traffic steps and observation windows with guardrail thresholds, exposure estimates and platform-aware rollback warnings.
Data Format Test Data Generator Generate repeatable synthetic test records from a field recipe and seed, with format-aware output and checks for blanks or normalized fields.
Devtools .env File Generator Generate reviewed .env and .env.example files with key cleanup and secret-aware placeholders while flagging quote or duplicate risks locally.
Devtools .gitignore Generator Build a repository-ready .gitignore from your stack and team setup, with secret-file exceptions and warnings for broad or duplicate rules.
Devtools .gitignore Pattern Coverage Checker Check whether .gitignore rules cover generated and sensitive paths, then find tracked files plus blocked negations and gaps before commit.
Devops .htaccess Generator Build an Apache .htaccess draft with routing, caching, headers, and access rules plus warnings to resolve before server testing.
Sysadmin .htaccess to Nginx Converter Convert a supported .htaccess subset into a reviewable NGINX draft with explicit warnings for unsupported or non-equivalent directives.
3D Printing 3D Print Volumetric Flow Calculator Calculate FDM volumetric flow from bead geometry and speed, compare it with a calibrated hotend limit, and find a reserve-adjusted speed cap.
Finance 401(k) Employer Match Calculator Estimate your 401(k) employer match from plan-specific tiers, eligible pay and payroll timing with caps and any confirmed annual true-up.
Game 7 Wonders Score Calculator Score a finished 7 Wonders game, convert remaining coins into treasury points, and rank each city with the official treasure tie-break.
Date Time 7-Minute Workout Timer Run a guided 12-move circuit timer with adjustable work and transition intervals, safer substitutions and browser cues, plus a complete time plan.
Networking ACL Wildcard Mask Calculator Calculate IPv4 ACL wildcard masks from CIDR and dotted entries, then audit generated lines for address coverage and dangerous overlaps.
PKI ACME DNS Challenge Readiness Check Check ACME DNS-01 readiness before retrying issuance with exact TXT matching, delegation-path validation, and public-resolver cache hints.
PKI ACME HTTP 01 Readiness Validator Check ACME HTTP-01 retry readiness with a weighted evidence review of the public challenge route and a clear fix-before-retry verdict.
Date Time AMRAP Workout Timer Build and run an AMRAP workout timer with round-split planning, pace warnings and live partial-score logging that stays in your browser.
HTTP API Error Budget Analyzer Measure API error-budget burn from status counts or access logs, project the compliance window, and spot policy-breaking failure rates.
Cloud API Gateway Cost Calculator Estimate monthly Amazon API Gateway charges across API families with request chunking, transfer costs and private endpoint budget context.
Security API Key Generator Generate cryptographically random API keys in your browser with public lookup IDs, SHA-256 verifier hashes, and issuance warnings.
HTTP API Pagination Window Calculator Estimate API retrieval time and payload from page size and endpoint limits while accounting for latency, concurrency, rate ceilings and retry reserve.
Finance APR Calculator Estimate APR from loan proceeds and finance charges across regular payment schedules, including a different final installment and note-rate comparison.
Exam Prep AWS AI Practitioner Exam Prep Practise AIF-C01 with 40 independently authored questions and sourced explanations, then review missed answers across five exam domains.
Exam Prep AWS Cloud Practitioner Exam Prep Practise AWS Cloud Practitioner CLF-C02 concepts with original questions, immediate explanations and focused reviews of missed answers.
Exam Prep AWS CloudOps Engineer Associate Exam Prep Practise AWS CloudOps SOA-C03 with 30 original questions and sourced explanations that help identify gaps across five operational domains.
Exam Prep AWS DevOps Engineer Professional Exam Prep Practise AWS DevOps Engineer Professional DOP-C02 with 36 original scenarios and explained answers to guide review of missed decisions.
Exam Prep AWS Developer Associate Exam Prep Practise AWS Developer Associate DVA-C02 with 28 original questions, source-linked explanations and focused retries of missed answers.
Exam Prep AWS Generative AI Developer Professional Exam Prep Study AIP-C01 with 40 independently authored generative AI scenarios, source-linked explanations and focused retries for missed answers.
Cloud AWS Lambda Cost Calculator Estimate monthly AWS Lambda Functions cost across requests, GB-seconds, provisioned capacity and optional meters with editable regional rates.
Exam Prep AWS Security Specialty Exam Prep Practise AWS Security Specialty concepts with 36 original SCS-C03 questions, source-linked explanations and focused domain review.
Exam Prep AWS Solutions Architect Associate Exam Prep Practise AWS Solutions Architect Associate questions with 32 original SAA-C03 scenarios and explanations for focused domain review.
Exam Prep AWS Solutions Architect Professional Exam Prep Review SAP-C02 architecture trade-offs in 24 unofficial scenarios with sourced explanations and domain feedback to guide further study.
Productivity Acceptance Criteria Generator Draft testable acceptance criteria from behaviors and edge cases, then check Gherkin or QA handoff wording for missing coverage and vague terms.
Home Improvement Accessibility Ramp Slope Calculator Plan or check accessibility ramp geometry from rise and run, then compare the route with key 2010 ADA slope and clearance benchmarks.
Diagnostics Ad Network Detector Check a public page for ad-network signatures and ads.txt seller alignment with confidence bands, fetch warnings, and focused follow-ups.
Psychology Adult ADHD Self-Report Scale (ASRS v1.1) 6-Question Screener Screen adult ADHD symptoms across the past six months with the official six-item ASRS v1.1, showing both published scoring methods and cutoffs.
Date Time Age Calculator Calculate calendar age between two dates with elapsed totals and a leap-day anniversary rule, then plan upcoming birthdays and milestones.
Tools & Equipment Air Compressor CFM Calculator Size an air compressor from tool demand and working pressure, then compare delivered SCFM with duty-cycle needs and receiver buffering.
Education Air Density Calculator Calculate CIPM-2007 moist-air density and specific volume from measured conditions with vapor contribution and a sea-level density ratio.
Household Air Purifier CADR Calculator Size an air purifier from room volume and target ACH, compare effective CADR with the adjusted need, and estimate how many units fit.
Aviation Aircraft Weight Balance Calculator Build an aircraft weight-and-balance worksheet, track fuel burn through each phase, and check entered weight limits and the CG envelope.
Aviation Airport Code Lookup Find IATA and ICAO airport codes by code or place, with ranked matches from built-in or broader registry data plus nearby distances.
Psychology Alcohol Use Disorders Identification Test (AUDIT-10) Complete and score the 10-item WHO AUDIT for the past year, see the 0–40 screening zone, and review which item groups contributed.
Psychology Alcohol Use Disorders Identification Test (AUDIT-C) Score three past-year AUDIT-C responses against published 3+ through 8+ reference lines, with non-diagnostic guidance and local processing.
Devops Alert Noise Rate Calculator Measure alert noise from classified CSV rows, compare it with your target, and isolate repeated alert-route groups without uploading data.
Education Alphabet Matching Sheet Generator Build alphabet matching worksheets with custom cue words and seeded versions plus answer keys and challenge distractors for focused practice.
DNS Alternative DCV Checker Check alternative certificate DCV proofs across DNS and web paths, including CSR-derived values and per-host mismatch or transport evidence.
Transport Anchor Rode Length Calculator Calculate anchor rode length with tide and bow-height allowances, then check whether the rode you carry meets your chosen scope.
Image Animated GIF Compressor Compress an animated GIF locally by scaling dimensions, reducing colors, or dropping frames while verifying duration and loop behavior.
Automation Ansible Inventory Generator Generate a static Ansible INI or YAML inventory from host rows and groups with checks for value typing, duplicate variables, and secrets.
Devops Apache Virtual Host Generator Draft an Apache virtual host for static files, PHP-FPM applications, or reverse proxies with TLS safeguards and activation checks.
Household Appliance Energy Cost Calculator Estimate an appliance's monthly and annual electricity cost from measured or rated power, runtime, duty cycle, standby use and your local rate.
Diagnostics Application Log Pattern Analyzer Group application logs into stable fingerprints, compare severity and time clusters, and triage recurring patterns without uploading the source.
Devtools Application Programming Interface (API) Testing Tool Test HTTP APIs from your browser with cURL import and authentication while inspecting exposed headers, timing, response text and CORS failures.
Mindfulness Aquarium Screensaver Simulator Tune a seeded aquarium animation, balance fish and bubble motion, and compare live frame delivery with your selected fullscreen FPS target.
Aquariums Aquarium Stocking Capacity Calculator Plan a freshwater stocking list from adult fish size and bioload, then check tank space, filtration, water chemistry and compatibility.
Aquariums Aquarium Substrate Amount Calculator Estimate aquarium substrate from inside footprint and sloped depth, then convert volume to whole packages using density, reserve and bag size.
File Tools Archive File Extractor Inspect a local ZIP, TAR or GZIP archive and download selected safe files as a normalized ZIP package with blocked paths clearly excluded.
Productivity Area Code Lookup Look up a NANP area code from a code, phone number or place and review assignment status, overlay context and official dialing evidence.
Education Arithmetic Practice Generator Create seeded arithmetic practice sheets with controlled operations and fact focus plus regrouping rules, answer keys and setup warnings.
Editor AsciiMath Editor Write and preview AsciiMath locally with native notation menus, exact source downloads, complete token and conversion checks, and supported MathML and LaTeX handoffs.
Psychometrics Ask Suicide-Screening Questions (ASQ) Route a clinician-administered ASQ screen to the NIMH negative, non-acute, or acute pathway with patient-group refusal handling and safety actions.
Home Improvement Asphalt Materials Calculator Estimate asphalt order weight from area and compacted depth using mix density, allowance and supplier rounding with truckloads and optional cost.
Education Attendance Rate Calculator Calculate attendance from present days or absence details, then test recovery needs, future absence cushion and custom percentage targets.
Education Attendance Sheet Generator Build printable attendance sheets from roster text or CSV with flexible sessions plus duplicate-name, page-fit, and privacy checks before printing.
Wireless Attenuator Pad Calculator Design a matched Pi or T attenuator from target loss and impedance, then audit preferred resistor values, input match and power rating.
Home Systems Attic Ventilation Calculator Size passive attic ventilation from floor area, balance intake and exhaust NFA, then convert product ratings into lengths or vent counts.
Audio & Music Audio Compressor Compress one local audio file to MP3 with chosen bitrate and channel handling, then verify playback settings and actual size savings.
Audio & Music Audio File Size Calculator Estimate audio file and session storage from PCM settings or encoded bitrate with multitrack counts, media-fit checks and a planning buffer.
Audio & Music Audio Format Converter Convert local audio for playback or lossless storage with preservation-first profiles and verified codec, sample rate and channel output.
Audio & Music Audio Loudness Normalizer Normalize a local mono or stereo audio file toward a LUFS target, with gated loudness measurement and a sample-peak-safe WAV result.
Audio & Music Audio Merger Join two to eight local audio clips in order, add optional silence, preview every seam, and download one verified 16-bit PCM WAV.
Audio & Music Audio Metadata Editor Edit common MP3 tags and front-cover artwork in your browser, then download an ID3v2.3 copy with the encoded audio left unchanged.
Audio & Music Audio Speed Changer Change audio speed from 0.50× to 2.00× in your browser with pitch-preserved or tape-style retiming, then preview the result and save a WAV.
Audio & Music Audio Trimmer Trim a local audio file to an exact interval with optional edge fades and a preview, then download a verified PCM WAV without uploading.
Audio & Music Audio-to-Video Creator Combine local audio with a still image or solid color to create a verified MP4 in landscape, square or portrait format without uploading media.
Security Audit Log Anomalies Analyzer Rank suspicious audit events from common log and CloudTrail exports using transparent signals for failures, source shifts, and privilege changes.
Automotive Auto Lease Payment Calculator Estimate a U.S. auto lease payment, cash due at signing, and scheduled outlay from quote terms with a line-by-line cost reconciliation.
Finance Auto Refinance Break-Even Calculator Compare a current auto loan with a dated refinance quote to find balance-adjusted break-even, horizon savings, lifetime cost and term change.
Diagnostics Autonomous System Number (ASN) Information Lookup Look up an ASN or public IP to compare current routing prefixes and neighbours with registry contacts and optional PeeringDB context.
Data Format Avro Schema Compatibility Validator Compare released and proposed Avro schemas locally, find writer-reader blockers, and review compatibility before a registry release.
Networking BGP AS Path Policy Checker Audit pasted BGP route paths for policy conflicts and trace each pass, watch or reject verdict before changing production router filters.
Networking BGP Prefix List Generator Turn IPv4 and IPv6 CIDR rows into platform-specific prefix-list syntax, with normalized networks and ordered-policy warnings.
Networking BGP Route Scale Calculator Estimate BGP route-state memory and update pressure from prefix and peer counts, retained paths and route bytes, with budget guardrails.
Email BIMI Record Generator Build a BIMI DNS TXT record for your selector and provider while checking DMARC posture, logo evidence and publication readiness.
Email BIMI Validation Report Check a domain's BIMI readiness across DMARC, logo SVG and certificate evidence with live public DNS results plus prioritized fix notes.
Body Metrics BMI-for-Age Percentile Calculator Calculate a child’s BMI-for-age percentile from measurements or known BMI and interpret it with WHO or CDC curves, z-scores and P95 checks.
Body Metrics BMR & TDEE Calculator Estimate BMR and TDEE, compare resting-energy formulas, and turn activity and goal assumptions into calorie and macro targets.
Education BST Operations Simulator Trace BST operations from insertion and search through deletion and traversal across ordinary, AVL or red-black trees with invariant checks and replay.
Parenting Baby Formula Amount Calculator Estimate a baby's daily formula range and bottle amount from age and weight, adjusted for feeding share and schedule with pediatric cautions.
Parenting Baby Formula Cost Calculator Estimate baby formula spending from label yield and daily prepared ounces with whole-container purchases, stock runway and checkout adjustments.
Childcare Babysitting Rate Calculator Estimate a babysitting rate and booking total using local pay and agreed care details while showing minimum-hour, fee, and rounding effects.
Storage Backup Capacity Calculator Plan backup repository capacity from retention and change rate with growth assumptions, copy tiers, operational reserves and raw storage overhead.
Storage Backup Restore Time Calculator Estimate a backup restore window from data size and tested throughput with compression and recovery phases, then check the RTO margin.
Sysadmin Backup Rotation Planner Plan backup rotation capacity across daily through yearly retention tiers with binary units plus compression, growth and dedupe assumptions.
Baking Bakers Percentage Calculator Scale a bread formula from total flour or target dough weight with preferment-aware hydration, yeast conversion and practical weigh-out rounding.
Home Improvement Baluster Spacing Calculator Calculate baluster count and clear spacing from a finished rail opening and actual part width, including stair-rake and field-rounding checks.
Networking Bandwidth Delay Product Calculator Calculate bandwidth-delay product and per-stream TCP window targets from path rate and RTT, then compare current buffers and stream counts.
Education Banker's Algorithm Deadlock Avoidance Simulator Test Banker’s algorithm states and resource requests with step-by-step safety traces, safe-sequence witnesses, and rollback decisions.
Strength Training Barbell Plate Load Calculator Build a balanced barbell plate recipe from the target and actual rack inventory, including the bar and collars with exact or nearby matching.
Productivity Barcode Generator Create Code 128, EAN-13, UPC-A, or Code 39 barcode artwork with check-digit validation and print-readiness checks before export.
Devtools Base64 Encoder and Decoder Encode or decode Base64 text and files locally, choose standard or URL-safe output, repair missing padding, and inspect the recovered bytes.
Home Systems Bathroom Exhaust Fan CFM Calculator Calculate bathroom exhaust fan CFM from room dimensions and fixtures, account for tall ceilings, then compare fan classes and installation checks.
Energy Battery Charge Time Calculator Estimate battery charge time across a chosen state-of-charge window using charger limits, efficiency and taper plus realistic derating and overhead.
Gardening Bee Sugar Syrup Mix Calculator Calculate sugar and water weights for bee syrup from a target volume or sugar on hand, with transfer-loss allowances and equal mixing batches.
Education Beginning Sounds Sheet Generator Create printable beginning-sound worksheets from a word list with seeded activity choices, teacher review flags and a complete answer key.
Education Behavior Reward Chart Generator Create a printable behavior reward chart with observable goals, age-aware planning checks, positive wording suggestions, and adult review notes.
Cycling Bicycle Tire Pressure Calculator Estimate front and rear bicycle tire pressures from measured load and setup with temperature adjustment, tuning ranges and safety limits.
Psychology Big Five Aspects Scales (BFAS-100) Compare five Big Five domains with ten paired aspects from the 100-item BFAS using exact keyed means and non-normative guidance.
Cycling Bike Chain Length Calculator Calculate bike chain cut length from chainstay and gear sizes, account for suspension growth, and check stock links and derailleur capacity.
Tools & Equipment Bilge Pump Capacity Calculator Estimate bilge pump delivery after lift and hose losses, then compare net removal and clearing time against a declared steady inflow.
Finance Bill Split Calculator Split a shared receipt into balanced payer amounts with exact-cent allocation or visible round-up cushions for tax, tips, discounts and fees.
Finance Billable Hours Calculator Calculate billable hours from duration or clock entries with rounding and write-down rules, then review net value and realization warnings.
Finance Billable Utilization Target Calculator Plan a billable utilization target from annual capacity and realized revenue, while protecting non-billable time and checking benchmark fit.
Finance Billing Document Generator Draft an invoice or purchase order from line items and tax, then check the parsed ledger, totals, and review warnings before handoff.
Devtools Binary Decimal Hex Converter Convert one integer from binary or other common bases, then inspect Base36 output plus exact signed-width and bit-field interpretations.
Education Bingo Card Generator Create reproducible bingo card packs from your own prompts, with seeded shuffling, duplicate cleanup, coverage checks, and caller order.
Education Binomial Probability Calculator Calculate exact or cumulative binomial probabilities with inclusive count bounds plus complements, expected value and model-assumption guidance.
Date Time Birthday Calculator Calculate exact calendar age and the next birthday from any reference date with leap-day choices, milestone dates, and reminder windows.
Devtools Bitwise Operations Calculator Run fixed-width bitwise logic, shifts and flag changes with signed values plus binary, hexadecimal and lane-level checks across 2 to 256 bits.
Finance Biweekly Timesheet Calculator Calculate two workweeks of shifts and breaks with regular-hour totals, overtime premiums and gross pay under an explicit weekly boundary.
Email Blacklist Checker (DNSBL/RBL) Check a mail host or sender IP across selected DNSBLs, distinguish policy listings from resolver errors, and inspect provider evidence.
Household Bleach Dilution Calculator Calculate bleach and water volumes for a target ppm, percent or ratio with stock-strength, derating and measuring-unit safety checks.
Randomness Block Randomization Schedule Generator Create a reproducible permuted-block allocation schedule using arm ratios and optional strata, with balance checks and final-block controls.
Devops Blue-Green Deployment Planner Plan a blue-green deployment with timed traffic shifts and health gates, then review exposure and rollback triggers with route-specific command drafts.
Game Board Game Sleeve Count Calculator Plan board-game sleeve packs from a card manifest with fit checks, reserve sleeves and whole-pack rounding plus cost and box-clearance estimates.
Transport Boat Fuel Range Calculator Estimate boat range and departure fuel from measured cruise burn, with reserve and unpumpable fuel allowances for one-way or return trips.
Body Metrics Body Composition Calculator Estimate body-fat percentage from tape measurements and compare Navy, RFM, and BMI-age methods with lean-mass and uncertainty context.
Body Metrics Body Mass Index (BMI) Calculator Calculate adult BMI from height and weight, compare three reference systems, and add waist-to-height and healthy-band weight context.
Body Metrics Body Metrics Calculator Compare adult BMI and waist ratios with three body-fat estimates, derived fat and lean mass plus BSA and method-spread warnings.
Body Metrics Body Recomposition Calculator Plan fat and lean-mass change across a chosen runway, then check the implied weight and nutrition targets against pace and uncertainty.
Body Metrics Body Surface Area Calculator Calculate body surface area from height and weight, compare five BSA formulas and review protocol choices for weight basis, caps and dosing.
Strength Training Bodyweight Workout Guide Build a timed bodyweight workout around your goal and current ability with movement swaps, recovery cues, and a complete session plan.
Finance Bond Yield to Maturity Calculator Calculate a conventional bond's yield to maturity from its price and cash flows with effective yield, current yield, and convergence checks.
Finance Bonus Pool Allocation Calculator Allocate a bonus pool by eligibility and weighted policy, then reconcile floors and caps plus payroll rounding against the final balance.
Finance Bonus Tax Calculator Estimate a 2026 U.S. bonus paycheck with percentage or aggregate federal withholding, FICA wage-base rules and your deferral and state-rate assumptions.
Date Time Boxing Round Timer Plan and run boxing-style rounds with exact work and rest timing, warning cues and live phase controls, plus a browser-local session log.
Game Boxing Scoreboard Tracker Track a boxing scorecard round by round, keep warnings separate from point deductions, and audit how every event changes the running total.
Quiz Braille Alphabet Quiz Practice visual recognition of Braille letters and digits with complete dot-pattern feedback, saved rounds and same/new/missed replay.
Baking Bread Water Temperature Calculator Calculate bread-mixing water temperature from desired dough temperature and measured ingredients, including mixer friction and batch calibration.
Finance Break-Even Calculator Calculate break-even and target-profit unit sales, then test price and cost changes against planned profit and margin of safety.
Parenting Breast Milk Storage Time Calculator Find a breast milk use-by time from its current state and storage condition, with CDC-based windows and stricter care-context cautions.
Breathwork Breathing Pacer Set a paced breathing rhythm with custom phase timing and live cues, then track the session in your browser with clear formulas and safety limits.
Finance Bridge Loan Cost Calculator Estimate bridge-loan interest and fees from a dated term sheet with planned exit costs, delayed scenarios and a balloon payoff split by cash timing.
Psychology Brief Resilience Scale (BRS) Assessment Score the six-item Brief Resilience Scale with reverse-keyed answers and a 1–5 mean mapped to clear low, normal, and high descriptive ranges.
Psychology Brief Resilient Coping Scale (BRCS) Assessment Score the four-item BRCS reflection, place the 4–20 total in a resilient-coping band, and review the answers behind the snapshot.
Psychology Brief Rumination Response Scale Compare brooding and reflective pondering across 10 mood-linked responses, with transparent 5–20 factor scores and no invented diagnostic cutoff.
Devtools Bug Report Generator Draft a tracker-ready bug report with structured reproduction details, triage fields, readiness checks, and local sensitive-data warnings.
Devtools Build Artifact Storage Calculator Estimate retained CI artifact storage and forecast growth against a quota using build cadence plus retention, cache, and reserve assumptions.
Email Bulk Sender Requirements Checker Check bulk sender readiness for Gmail, Yahoo and Outlook using delivered headers plus DNS, complaint-rate and unsubscribe evidence before launch.
Date Time Business Days Calculator Count business days or move a deadline with custom weekends and holidays, endpoint rules, and a date-by-date exclusion record.
PKI CAA Validation Report Check a hostname's CAA policy through its effective DNS record set and wildcard rules, with issuer findings and public resolver evidence.
Psychometrics CAT-PD Static Form, Version 1.1 Complete the 216-item CAT-PD-SF v1.1 and review 33 dimensional trait means with direct self-harm safety guidance and local scoring.
Date Time CBT-I Sleep Diary Tracker Track nightly sleep timing and CBT-I patterns with local diary storage plus seven-night efficiency averages, wake drift, and trend review.
Sleep Hygiene CBT-I Sleep Window Calculator Plan a diary-based CBT-I sleep window around a fixed wake time, then review efficiency bands, safety floors and weekly adjustment cues.
HTTP CDN Cache Hit Savings Calculator Estimate CDN cache-hit savings from origin traffic and request costs, with break-even hit rates and setup-cost payback for each scenario.
Finance CFPB Financial Skill Scale — Abbreviated Form Complete the five-item CFPB Financial Skill Scale and convert the keyed total with the official age and administration lookup table.
Finance CFPB Financial Skill Scale — Standard Form Complete the 10-item CFPB Financial Skill Scale and convert your answers by age and administration mode into the official 0–100 score.
Finance CFPB Financial Well-Being Scale — Abbreviated Form Measure financial well-being with the five-item CFPB form, use the official context lookup, and interpret the resulting 0–100 score range.
Finance CFPB Financial Well-Being Scale — Standard Form Measure perceived financial security and freedom of choice with the 10-item CFPB scale, official scoring lookup, and six score ranges.
Education CFPB Youth Financial Capability Survey — Grades 3–5 Complete the CFPB grades 3–5 money journey survey and see an overall result plus three building blocks for guided learning reflection.
Education CFPB Youth Financial Capability Survey — Grades 6–8 Complete the CFPB grades 6–8 money journey survey and compare overall progress across planning, money habits, and financial choices.
Education CFPB Youth Financial Capability Survey — Grades 9–12 Complete CFPB’s 30-item grades 9–12 financial capability survey and review the overall result with three building-block scores.
Devtools CI Failure Log Analyzer Find actionable clues in a failed CI log, map them to pipeline stages, and mask common secret patterns before sharing the evidence.
Devops CI Runner Capacity Calculator Estimate CI runner slots from workload minutes and peak demand, then check utilization headroom and queue-clear time against platform caps and retry load.
Networking CIDR Allowlist Risk Checker Check CIDR allowlists for risky address breadth and service exposure, then review ownership, expiry dates and overlapping rules before approval.
Devtools CODEOWNERS Coverage Analyzer Check changed paths against base-branch CODEOWNERS rules, measure direct and fallback coverage, and surface review gaps before merge.
HTTP CORS Policy Risk Checker Review CORS response headers for unsafe origin trust and credential use, then catch cache or private-network combinations that need priority fixes.
Diagnostics CPS Test Measure clicks per second in a timed browser trial, compare pace and consistency, and filter near-duplicate presses when checking switch bounce.
Education CPU Scheduling Algorithm Simulator Compare CPU scheduling policies through dispatch traces and ready-queue decisions, including context-switch overhead and per-process timing metrics.
Security CSP Header Generator Draft a Content Security Policy header with nonce, hash, or allowlist script trust plus report-only rollout checks and blocker warnings.
HTTP CSP Header Policy Checker Check a Content-Security-Policy header for risky script sources and missing baseline directives, with reporting and rollout blockers explained.
Devtools CSS Border Radius Generator Generate circular or elliptical border-radius CSS, inspect clockwise corner values, and check whether the browser will scale overlapping curves.
Devtools CSS Box Shadow Generator Compose ordered CSS box-shadow layers and compare blur and spread in a live preview before copying a stylesheet rule or reusable design token.
Devtools CSS Flexbox Generator Build Flexbox container and optional child-sizing CSS with axis-aware alignment, wrapping warnings, plus a live preview and starter HTML.
Devtools CSS Formatter Format CSS into readable, consistently indented source with structural error checks and a local audit of rules, declarations, and nesting.
Image CSS Gradient Generator Build CSS gradients using linear, radial or conic geometry with exact color stops and optional modern interpolation spaces for copy-ready stylesheets.
Devtools CSS Grid Generator Build responsive or fixed CSS Grid rules with auto-fit and auto-fill options, fit estimates, plus narrow-container safeguards and starter HTML.
Devtools CSS Minifier Minify CSS locally with conservative rewrite profiles and byte-savings metrics, while preserving protected comments and flagging release risks.
Devtools CSS Validator Check CSS structure locally with line-aware errors and review warnings for duplicate declarations, empty rules, and risky at-rules.
Data Format CSV File Comparator Compare two CSV or TSV exports by selected keys and review schema and record changes, including duplicate keys and rejected rows, without uploading data.
Data Format CSV Schema Validator Validate CSV or TSV imports against column types and required values, including ranges and uniqueness, with safe pattern checks and row-level findings.
Education CVC Word Practice Sheet Generator Create printable CVC word practice sheets with activity and word-family choices plus spelling-pattern review, teacher notes and answer keys.
HTTP Cache TTL Hit Rate Calculator Model hit rate for fixed or sliding cache TTLs and compare target reachability with origin load, latency savings, and freshness pressure.
Coffee Cafe Drink Cost Calculator Price a cafe drink from its full per-cup cost, then round the recommendation upward to meet beverage-cost and gross-margin targets.
Coffee Caffeine Content Calculator Estimate caffeine per serving and session from a label or drink preset, then compare daily intake and a modeled clearance timeline.
Sleep Hygiene Caffeine Cut-off Calculator Plan a caffeine cut-off from dose and bedtime using half-life and a residual target, then check a proposed drink time and daily total.
Baking Cake Pan Conversion Calculator Calculate a cake recipe multiplier for different pan sizes and shapes, with batter-depth and capacity checks against your chosen fill limit.
Baking Cake Servings Calculator Plan cake servings for your guest count and portion style, then compare pan or tier yield with reserve needs and estimate batter and icing.
Date Time Calendar ICS Generator Create an import-ready ICS event with correct date boundaries and time-basis handling, plus escaped text, reminders and validation checks.
Cardio Training Calories Burned Calculator Estimate gross and active calories from activity MET, body weight and duration using a consistent model with target time and weekly totals.
Photography Camera Memory Card Capacity Calculator Plan camera memory cards for photos and video with mirrored-slot capacity plus checks for spare reserve, burst recovery and sustained write speed.
Education Capacitor Calculator Calculate parallel-plate capacitance from plate geometry and dielectric choice, then estimate stored charge and energy plus electric field and voltage margin.
Devops Capacity Upgrade Brief Report Build a capacity upgrade brief from utilization and compounded growth, then compare threshold runway, lead time and ranked upgrade options.
Finance Capital Gains Tax Calculator Estimate U.S. capital gains tax from sale proceeds and adjusted basis with verified losses, federal brackets and an optional NIIT estimate.
Finance Car Loan Calculator Estimate a car loan payment and payoff from deal terms including trade equity and financed charges, then compare interest and total payments.
Diagnostics Car Tire Pressure Calculator Plan front and rear cold tire pressure from placard values and trip load with axle-share, temperature-change and equipment-limit checks.
Nutrition Carb Loading Calculator Plan race-week carbohydrate grams from body weight and event length, then split daily targets across loading days, meal blocks and practiced drinks.
Education Carpet Calculator Estimate carpet order quantity and cost from room size and roll width with a cut-direction plan for seams plus offcuts, pattern repeat and waste allowance.
Text Case Converter Convert headings and identifiers into 13 case styles with per-line scope, acronym rules and accent folding for filenames or slugs before reuse.
Finance Cash Flow Runway Calculator Project how long operating cash lasts month by month, test collection and cost scenarios, and estimate funding needed to protect a reserve floor.
Finance Cash Flow Statement Preparer Prepare a direct-method cash flow statement, classify signed movements by activity, and reconcile opening cash to the closing balance.
Pets Cat Calorie Calculator Estimate daily calories and food-label portions for a healthy adult cat at ideal body condition, with meal splits and a 10% treat ceiling.
Home Systems Ceiling Fan Size Calculator Match a ceiling fan to room area and height, then verify physical fit and airflow performance plus location safety and annual running cost.
Home Improvement Cement Board Sheets Calculator Estimate whole cement board sheets and sheet cost for floors, walls and alcoves with opening deductions plus waste, spares and accessory allowances.
Psychology Center for Epidemiologic Studies Depression (CES-D-20) Check past-week depressive symptom frequency with the 20-item CES-D and review reverse scoring, the 16-point line, and optional answer review.
Devops Ceph Storage Capacity Calculator Estimate recovery-safe Ceph usable capacity for replicated or erasure-coded pools with failure-domain reserve, fullness limits and PG guidance.
PKI Certificate Inventory Expiry Checker Review a certificate inventory CSV locally to rank renewal urgency and flag ownership, manual-process, invalid-date and public-lifetime risks.
Security Certificate Renewal Window Calculator Plan certificate renewal capacity across a safe pre-expiry window with retry reserve and daily load, then check spread and deadline slack.
PKI Certificate Signing Request (CSR) Decoder Decode a CSR locally, check supported self-signatures and requested names, and review key or hostname issues before certificate submission.
Security Certificate Signing Request (CSR) Generator Generate a PKCS#10 RSA CSR and matching private key in your browser, with SAN review and optional encrypted PKCS#8 key export.
Diagnostics Certificate Transparency Checker Check an exact TLS certificate fingerprint against public CT data and compare hostname coverage, issuer evidence and provider revocation flags.
Exam Prep Certified Kubernetes Administrator Concepts Exam Prep Practise CKA v1.37 concepts with unofficial multiple-choice rounds and sourced explanations that help focus your next hands-on study session.
Exam Prep Certified Kubernetes Application Developer Concepts Exam Prep Practice CKAD v1.37 concepts with unofficial questions and explanations, then use missed answers to focus your hands-on Kubernetes study.
Exam Prep Certified Kubernetes Security Specialist Concepts Exam Prep Review CKS security concepts with 26 original, unofficial questions and source-linked explanations to guide separate hands-on Kubernetes practice.
Devops Change Risk Assessment Reporter Assess an IT change with weighted impact and readiness evidence to produce a residual-risk tier, approval route and gate-closing actions.
Productivity Changelog Generator Turn release notes, changelog sections, or Conventional Commit subjects into grouped Markdown with SemVer signals and pre-publish checks.
Productivity Checklist and Log Generator Turn one-item-per-line notes into Markdown checklists or logs while keeping source order and duplicates and adding optional context when needed.
Education Chemical Equation Balancer Balance molecular or ionic chemical equations with smallest whole-number coefficients, then verify atom and supplied-charge conservation.
Date Time Chess Clock Timer Run a two-player chess clock with increment or delay rules, low-time cues, and a move ledger for casual games and timed practice.
Quiz Child Car Seat Safety Quiz Practice U.S. child car seat safety with 28 original scenarios, answer explanations and focused retries to review missed questions.
Quiz Child Poison Prevention Quiz Practice U.S. child poison prevention with 30 household questions, source-linked explanations and focused retries for the answers you miss.
Childcare Childcare Cost Calculator Estimate monthly and annual childcare spending from provider quotes and direct help, with an income comparison and optional 2025 federal care-credit scenario.
Finance China Take-Home Pay Calculator Estimate Mainland China resident take-home pay with cumulative salary withholding, entered employee contributions, and a month-by-month tax ledger.
Text Chinese Pinyin Annotator Add Pinyin to Chinese text in your browser, review polyphonic readings, then choose how tones and syllable boundaries appear before export.
Text Chinese Script Converter Convert Chinese text among Simplified, Standard Traditional and regional Taiwan or Hong Kong phrase profiles using version-pinned local data.
Education Circle Time Routine Planner Build an age-aware circle time routine with balanced movement and participation, then review duration fit and waiting pressure with practical support cues.
Date Time Circuit Training Timer Plan a circuit training session with named stations and realistic transitions while checking round recovery, work density, and the live phase schedule.
Security Cisco ACL Generator Generate Cisco ACL commands from IPv4 flow rows for IOS, NX-OS, and ASA with platform-aware address conversion and safety checks before use.
Exam Prep Cisco CCNA Exam Prep Practise CCNA v1.1 concepts with 42 independent questions and source-linked corrections, then revisit missed answers in focused rounds.
Networking Cisco Interface Config Generator Generate Cisco interface commands for routed, access, or trunk ports with profile-aware syntax plus normalized VLAN lists and review warnings.
Education Citation Generator Build citation drafts from one source record across six common styles with in-text forms, DOI cleanup, and field-by-field review prompts.
Education Classroom Resource Pack Generator Build a lesson plan or another classroom resource with objective-based sections, weighted pacing, and explicit teacher-review checks.
Education Classroom Supply Budget Calculator Build a classroom supply budget from enrollment and shared kits, accounting for stock and pack sizes before discounts, tax and funding limits.
Small Business Cleaning Quote Calculator Price a residential cleaning job with scope-based rates and add-ons while checking labor estimates, planning range, and margin before quoting.
Productivity Click Counter Keep a browser-based tally for repeated events, correct mistakes without losing the session peak, and review action history as you count.
Cloud Cloud Egress Cost Calculator Estimate cloud egress spend from measured traffic and a marginal rate card with verified reductions, peak-month stress testing, and budget variance.
Cloud Cloud NAT Gateway Cost Calculator Estimate monthly cloud NAT cost from gateway time and routed traffic while comparing offload savings, route charges, and budget impact.
Devops Cloud Tag Coverage Analyzer Audit cloud inventory tags against required keys and allowed values, measure whole-resource coverage, and rank the gaps that need cleanup.
Sysadmin Cloud-init Network Config Generator Build cloud-init version 2 YAML for a static VM interface, with CIDR and route validation plus warnings for risky boot assumptions.
Education Cloze Worksheet Generator Turn a passage into a cloze worksheet with targeted or rule-based blanks, reproducible word banks and density checks, plus an answer key.
Coffee Coffee Bag Yield Calculator Calculate how many servings a coffee bag yields and what each costs, then estimate runout and reorder timing from waste and daily use.
Coffee Coffee Brew Planner Plan coffee dose, brew water and timed pours from served volume and ratio with absorption, bloom and projected strength guidance.
Coffee Coffee Brew Suite Plan coffee recipes for pour-over through espresso with mass-balance dose math, strength and extraction checks and controlled dial-in guidance.
Coffee Coffee Catering Quantity Calculator Plan event coffee from attendance and serving assumptions with rounded regular and decaf batches, supply quantities, and station capacity.
Coffee Coffee Cupping Score Calculator Calculate a legacy-style coffee cupping score from quality attributes and affected cups, then apply defect penalties and clear score bands.
Coffee Coffee Drink Calorie Calculator Estimate coffee drink calories from a measured recipe and see which ingredients drive the total before comparing milk, syrup, or cream swaps.
Coffee Coffee Extraction Yield Calculator Calculate coffee extraction yield from dose and beverage mass with TDS or Brix conversion, inclusive targets, and dilution estimates.
Coffee Coffee Extraction and Strength Calculator Calculate coffee strength and extraction yield from dose, beverage mass, and a TDS or Brix reading with method-specific target boxes.
Coffee Coffee Freshness Window Checker Estimate a coffee bag’s roast-date freshness window with adjustments for brewing style and grind plus storage exposure and daily use.
Coffee Coffee Roast Yield Loss Calculator Calculate coffee roast loss and sellable yield from green and roasted weights, then plan target output with QC pulls and unit cost.
Coffee Coffee Strength Calculator Measure coffee strength from TDS or Brix and calculate extraction yield, with clear comparisons against stated filter, immersion and espresso targets.
Coffee Coffee Water Recipe Calculator Build coffee water from GH, alkalinity and TDS with source dilution and exact mineral doses, plus checks for small measurements and equipment risks.
Coffee Coffee to Water Ratio Calculator Plan a repeatable coffee-to-water ratio from a weighed dose or target cup yield, including retained water and method-specific starting ranges.
Game Coin Flipper Flip a fair or biased coin with fresh or seeded randomness, then compare observed counts with expected outcomes and reproducible streak history.
Coffee Cold Brew Dilution Calculator Turn filtered cold brew concentrate into a ready-to-drink batch with water or milk splits, ice allowance, reserve, and serving yield.
Finance College Cost Planner Plan college costs by academic year with separate projections for aid and available funding, then see each year's net price and funding gap or surplus.
Education College GPA Calculator Project college GPA from courses and prior credits with repeat and pass/fail audits, plus clear comparisons for standing, target gaps and grade lift.
Image Color Palette Generator Generate a seeded HEX palette with fixed harmony rules, black-or-white text choices, and WCAG contrast checks for every color pair.
Data Format Comma-Separated Values (CSV) Converter Convert CSV-like text into structured formats, review row alignment and column completeness, and keep sensitive source data in your browser.
Transport Commute Cost Calculator Compare annual driving and transit costs across hybrid schedules, including cash expenses, time value, and current US mileage-rate proxies.
Exam Prep CompTIA A+ Core 1 Exam Prep Review A+ Core 1 hardware and connectivity decisions through 40 original 220-1201 questions with objective-linked corrections and targeted retries.
Exam Prep CompTIA A+ Core 2 Exam Prep Practise A+ Core 2 support decisions with 32 unofficial 220-1202 questions and sourced explanations that distinguish inspection from repair.
Exam Prep CompTIA Network+ Exam Prep Practise CompTIA Network+ N10-009 with 35 original questions, sourced answer explanations and focused retries for missed concepts.
Exam Prep CompTIA Security+ Exam Prep Practise English CompTIA Security+ SY0-701 (V7) with 30 original questions, source-linked explanations and focused retries of missed answers.
Gardening Companion Planting Checker Compare crops for family conflicts and mismatched water or space needs, with evidence cues that keep folklore from overruling real bed conditions.
Gardening Compost Carbon-to-Nitrogen (C:N) Ratio Calculator Estimate compost C:N from material weights, moisture and feedstock values, then check target balance and calculate the brown or green material to add.
Finance Compound Interest Calculator Project compound-interest growth from deposits and a nominal rate, then test how timing, taxes, fees, inflation, and a goal change the outcome.
Devtools Compute Throughput Calculator Estimate theoretical FLOP/s or OP/s from architecture inputs, then compare compute utilization with the memory-bandwidth roof.
Home Improvement Concrete Calculator Estimate concrete for slabs and other common pours with waste, whole-bag counts and ready-mix rounding, plus optional material cost and weight.
Electrical Conduit Fill Calculator Check conductor area against conduit fill limits for EMT, IMC, RMC, or PVC, then find the first same-type trade size that fits.
Automation Config Drift Checker Compare approved and observed configuration snapshots, classify meaningful drift, and prioritize changed or missing security settings.
Finance Construction Loan Draw Calculator Plan construction loan draws using actual-day interest and retainage with reserve use, remaining availability and borrower cash requirements.
Devops Container Image Pull Time Calculator Estimate container image pull time across rollout waves from cache coverage and changed layers, with bandwidth, unpack and retry assumptions.
Security Container Security Scan Analyzer Normalize container scan reports, apply critical and high release limits, and rank fixable findings for a focused remediation queue.
Small Business Contractor Markup Margin Calculator Price or audit a contractor bid with direct cost, overhead and contingency while keeping profit margin separate from cost markup.
Devtools Conventional Commit Messages Checker Check Conventional Commit headers or full messages against repository rules and see each valid message’s release impact before publishing.
Education Convex Hull Algorithm Simulator Trace monotone chain, Graham scan or Jarvis march step by step with exact turn tests and collinear policies, plus area and perimeter.
Cooking Cooked Yield Shrinkage Calculator Calculate cooked yield and shrinkage from measured batch weights, then price finished portions and plan the next as-purchased quantity.
Education Coordinate Distance and Area Calculator Measure an ordered WGS84 path or polygon for geodesic distance and ellipsoidal area, with bearings plus an auditable segment ledger.
Psychology Copenhagen Burnout Inventory (CBI) Assessment Score 19 Copenhagen Burnout Inventory responses into separate personal, work, and client-related means with 50-point and PUMA comparisons.
Gardening Corn Yield Calculator Estimate pre-harvest corn yield from representative ear samples and compare field variability, moisture context and kernel-weight assumptions.
Body Metrics Corrected Age (Preterm) Calculator Calculate a preterm baby’s corrected age from the original due date or gestational age, with chronological context and a two-year guide.
Finance Cost Per Hire Calculator Calculate cost per completed hire from aggregate or itemized recruiting costs, then compare spend mix and performance against your target.
Education Count and Color Sheet Generator Create count-and-color worksheets for numbers 0 through 20 with adjustable outline banks, reproducible prompt mixes, and answer checks.
Date Time Countdown Timer Count down to a deadline using local, UTC, fixed-offset or named time-zone rules with optional buffers plus progress and planning milestones.
Home Improvement Countertop Slab Yield Calculator Estimate countertop slabs to reserve from measured pieces and usable slab size, including layout allowances plus seam-fit and material-cost checks.
Quiz Country Flags Quiz Practice 194 country flags in seeded world, regional, ASEAN, EU, or Commonwealth rounds with flexible feedback and missed-flag review.
Travel Country Information Lookup Find country or territory facts from names and common identifiers, then review ranked matches and source freshness from a frozen dataset.
Finance Country Take-Home Pay Comparator Compare country salary offers after modeled tax and employee contributions, then normalize exchange rates and cost-adjusted buying power.
Nutrition Creatine Loading Calculator Plan optional creatine loading and maintenance from body weight, then check daily grams against label units and available container supply.
Finance Credit Card Calculator Estimate credit card payoff time or solve a target payment from balance and APR, with new charges, lump sums and promotional-rate periods.
Devtools Credit Card Number Generator Generate reproducible Luhn-valid card-shaped fixtures for form testing, with synthetic prefixes and optional CVV or expiry fields.
Diagnostics Credit Card Number Validator Check payment-card test numbers with Luhn and issuer-length rules, review batch verdicts, and keep full PAN handling risks visible.
Game Cricket Scoreboard Tracker Score a cricket innings ball by ball with correct legal-delivery handling and follow scoring pace, wicket buffer, projection and chase status.
Devops Cron Expression Parser Parse five-field Unix cron expressions, preview upcoming runs in local time or UTC, and flag dialect, day-matching, and timezone risks.
Psychometrics Cronbach Alpha Calculator Calculate Cronbach's alpha from survey responses with reverse scoring and missing-data rules, then review item diagnostics and report wording.
Automation Crontab Generator Build a user or system crontab entry from a preset, pasted line, or five-field schedule with syntax checks and host-review warnings.
Gardening Crop Rotation Planner Plan crop rotations from bed history and plant families with conflict scores, capacity-aware assignments and locally grounded caution notes.
Sewing Cross Stitch Fabric Size Calculator Calculate cross-stitch fabric cut dimensions from chart stitches and fabric count, then add allowances and shrink reserve before upward rounding.
Education Crossword Puzzle Generator Turn answer-and-clue lines into a reproducible crossword, then review crossings and unused entries before printing the puzzle and key.
Date Time Current Time Check one browser-clock instant in local and UTC forms, capture stable ISO 8601 and Unix values, and spot a nearby date boundary.
Psychology Cut Down, Annoyed, Guilty, Eye-opener (CAGE) Assessment Score the four lifetime CAGE questions, check the standard two-Yes cutoff, and see separate safety guidance when Eye-opener is endorsed.
PKI DANE TLSA Validation Report Validate DANE TLSA records across mail or direct TLS routes with DNSSEC evidence, record checks, and optional certificate digest comparison.
Database DB Replica Lag Catch-up Calculator Estimate whether a database replica can drain its backlog within a target window, with retained-log risk and throttle or apply-boost scenarios.
Networking DHCP Scope Calculator Size an IPv4 DHCP scope from real pool ranges and peak demand, then test policy choices against growth and target headroom before deployment.
DNS DKIM DNS Record Generator Build a DKIM TXT record from a selector and public key with validation and DNS string splitting, plus rollout checks before publishing.
Diagnostics DKIM Validation Report Check a DKIM selector in public DNS and review its record count, key strength and policy tags with clear testing and resolver evidence.
DNS DMARC DNS Record Generator Build a current or legacy DMARC TXT record with policy inheritance and reporting destinations plus DNS string splitting and rollout review.
Diagnostics DMARC Validation Report Validate a domain's DMARC policy and check syntax, alignment and external report receivers before making stricter mail enforcement changes.
DNS DNS Cache Capacity Calculator Estimate DNS resolver cache memory from insert churn and TTL, then compare budget headroom with upstream QPS and hit-versus-miss latency.
Diagnostics DNS Configuration Report Audit a domain's public DNS for authority, address and mail-policy gaps while comparing TTL horizons and resolver-visible evidence across common records.
DNS DNS Delegation Trace Analyzer Trace a public hostname through DNS delegation and aliases, compare resolver views, and inspect DNSSEC or negative-cache clues.
Diagnostics DNS Denial Proof Report Investigate NXDOMAIN or NODATA using recursive resolver evidence plus NSEC or NSEC3 coverage, DNSSEC clues and negative-cache retry timing.
Diagnostics DNS Glue & Delegation Check Check DNS glue and delegation for a public zone, compare resolver views, and identify missing NS addresses, aliases, or DS evidence.
DNS DNS Propagation Checker Check DNS propagation across public resolvers, compare the intended record set, and identify cache holdouts with TTL and failure evidence.
DNS DNS Record Enumerator Enumerate public DNS records for a domain or IP through Cloudflare or Google, compare query coverage, and flag mail or DNSSEC gaps.
Diagnostics DNS Record Lookup Look up DNS records for a domain, URL or IP through Google or Cloudflare with response codes, returned TTL evidence and DNSSEC flags.
Quiz DNS Record Types Quiz Practice choosing DNS record types from definitions and practical scenarios, with source-linked explanations and retries for missed answers.
DNS DNS TTL Change Window Calculator Plan a DNS TTL cutover window from cache-drain and observation timing, including negative-cache checks and resolver refresh pressure.
Diagnostics DNS Wildcard Behavior Check Test DNS wildcard behavior with random public resolver probes and distinguish broad matches, branch boundaries, mixed views, and cached negatives.
DNS DNS Zone File Generator Draft a BIND or provider-ready DNS zone file with normalized records, SOA and TTL checks, plus mail and DNSSEC review warnings.
DNS DNS Zone File Validator Validate a DNS zone file before import, uncover authority and TTL conflicts, and inspect expanded records without uploading the source.
DNS DNSSEC Validator Validate a domain's DNSSEC trust evidence from parent DS through DNSKEY signatures and resolver AD signals with a focused 15-check report.
File Tools DOCX Compressor Compress a DOCX locally by resizing eligible JPEG and PNG media, preserving unselected package parts, and verifying the rebuilt Word file.
File Tools DOCX Converter Convert one DOCX locally into portable web or document formats, with structure checks and controls for embedded images and review notes.
File Tools DOCX Creator Turn reviewed HTML, Markdown, or plain text into an editable DOCX that preserves safe structure and clearly warns about unsupported content.
Devops DORA Metrics Analyzer Analyze deployment records across five DORA metrics with transparent formulas and adjustable guardrails, plus warnings when recovery evidence is missing.
Devops DR Runbook Report Build a disaster recovery runbook around RTO and RPO goals, accountable recovery steps and evidence-based readiness gates for owner review.
Quiz Data Backup and Recovery Quiz Practise data backup and recovery decisions with 24 original scenarios, answer explanations and focused retries across eight lifecycle topics.
Networking Data Transfer Rate Converter Convert data transfer rates across bit and byte units in SI or IEC notation, with overhead modeling, payload timing and delivery-window capacity.
Database Database Connection Pool Calculator Size database connection pools across replicas and workers while checking reserve-aware headroom, rollout surge risk and per-holder caps.
Database Database Index Rollout Planner Plan a database index rollout with engine-aware SQL and build estimates, then review risk and guardrails for validation and rollback.
Database Database Migration Risk Checker Check SQL migration risk before release with engine and table context, exposing destructive changes plus lock hazards, rewrites and backfills.
Database Database Storage Growth Calculator Forecast database storage runway from projected data growth, then include operational overhead and estimate threshold dates and monthly cost.
Date Time Date & Time Difference Calculator Calculate elapsed time across dates and UTC offsets while separating workdays, business-window hours and holiday-adjusted checkpoints.
Finance Debt Consolidation Comparator Compare current debts with a consolidation quote to see monthly payment and payoff timing alongside fees, durable break-even and modeled lifetime cost.
Finance Debt Repayment Calculator Plan monthly debt payoff from balances and APRs with extra payments and lump sums, then compare timing and interest across strategies.
Education Decibel Calculator Convert pressure or power ratios to decibels and solve dB levels back to voltage or amplitude quantities with fixed and custom references.
Home Improvement Deck Materials Calculator Estimate deck boards and framing alongside footings and railing, stairs and hardware with an illustrative budget for a rectangular layout.
Education Decodable Reading Passage Generator Generate a phonics-aligned reading passage from controlled sentence banks, then review coverage and words needing teacher attention.
Home Systems Dehumidifier Size Calculator Estimate dehumidifier capacity from room size and moisture conditions, then compare portable-unit tiers with drainage and energy needs.
Devtools Dependency License Flags Checker Check dependency license evidence against your release policy, interpret SPDX choices and prioritize packages that are blocked or need review.
Devtools Dependency Update Risk Analyzer Rank dependency updates by release movement, runtime exposure, security and test evidence to plan safer review and merge lanes for your project.
Psychology Depression Anxiety Stress Scales (DASS-21) Assessment Complete the DASS-21 for the past week and review doubled Depression, Anxiety, and Stress scores with exact severity bands and safety context.
Photography Depth of Field Calculator Calculate near and far focus limits, total depth of field and hyperfocal distance, with optional blur tolerance, scene checks and setup comparison.
Education Dew Point Calculator Calculate dew point from air temperature and humidity, then compare a measured surface with condensation margins and moisture details.
Parenting Diaper Usage Calculator Estimate diapers to buy and when to reorder from daily use, current stock and pack details with reserve planning and broad size-fit cues.
Game Dice Roller Roll tabletop dice notation with keep/drop rules, advantage, rerolls, explosions, seeded replay, and empirical target success rates.
Security Diceware Passphrase Generator Generate a Diceware passphrase from the EFF long list with secure browser or manual dice rolls, entropy estimates and policy checks.
Shipping Dimensional Weight Shipping Calculator Calculate parcel dimensional weight from packed dimensions, compare it with scale weight, and screen carrier divisors and rounding rules.
Wireless Dipole Antenna Calculator Calculate half-wave dipole total and per-leg cut lengths from frequency, shortening factor, and trim allowance with practical tuning guidance.
Education Directed Graph Algorithms Simulator Trace topological ordering and cycle evidence or find strongly connected components with four classic directed-graph algorithms step by step.
Finance Discount Calculator Calculate the final checkout after sequential discounts, coupons, shipping and tax with effective savings and budget-gap comparisons.
Education Disk Scheduling Algorithm Simulator Compare classic disk-scheduling policies on one request queue with animated service order, endpoint events, and total head movement.
Finance Dividend Reinvestment Calculator Project dividend reinvestment period by period with contributions and changing price assumptions, including taxes, fees and fractional-share rules.
Devops DoH Query Packet Crafter Build an exact DNS-over-HTTPS query packet, inspect its wire fields and EDNS options, then replay it with GET or POST against a resolver.
Devops Docker Compose Generator Build single-service Docker Compose YAML with safer network and secret defaults plus storage, health-check and restart-policy review.
Devops Docker Compose Healthchecks Checker Check Docker Compose healthchecks for missing commands, timing risks, blocked readiness dependencies, and role-based coverage before release.
Devops Dockerfile Generator Build a Dockerfile and .dockerignore for Node.js, Python, Go or Java using multi-stage patterns plus cache mounts and hardening checks.
Devops Dockerfile Security Basics Checker Check a Dockerfile for risky base images, embedded secrets, broad copies, root users, package residue, and missing runtime safeguards.
Pets Dog Grooming Quote Calculator Plan a dog grooming quote from appointment workload and business costs, with margin protection plus inspect-first safety checks for uncertain cases.
Gardening Drip Irrigation Zone Flow Calculator Calculate drip-zone demand from layout, emitter count or measured flow with pressure correction and checks for supply and lateral capacity.
Home Improvement Drop Ceiling Grid Materials Calculator Estimate suspended-ceiling tile and grid materials from room size and panel module, including hanger wire plus whole-carton and fastener needs.
Home Maintenance Dryer Vent Length Calculator Calculate dryer vent equivalent length from straight duct and fittings, then compare the route with code or dryer-manual limits and safety cues.
Home Improvement Drywall Materials Calculator Estimate drywall sheets and supporting materials for walls or ceilings using measured dimensions or known area, with waste and cost planning.
Text Duplicate Line Remover Remove duplicate lines with precise case and whitespace rules, then verify kept and dropped groups before copying the cleaned list.
Education Dynamic Programming Algorithm Simulator Explore memoization and tabulation for three classic problems through state tables, exact recurrences, and traceable solution choices.
Networking ECMP Path Capacity Calculator Estimate ECMP route capacity from healthy paths and hash efficiency, then test reserve headroom plus member-failure and single-flow limits.
DNS EDNS Client Subnet (ECS) Tester Compare DNS answers with and without an EDNS Client Subnet hint, then inspect answer steering, echoed scope, TTL drift, and privacy clues.
Diagnostics EDNS Options Inspector Inspect EDNS OPT responses from public DNS-over-HTTPS resolvers, compare requested and returned options, and keep replay evidence.
Date Time EMOM Workout Timer Build an EMOM minute plan with repeatable movement targets, estimated rest buffers, pacing warnings, and a live workout timer.
Data Format ENV Converter Convert ENV text into common configuration formats with controlled expansion, duplicate-key handling and secret-like value checks before deployment.
Electrical EV Charger Circuit Load Calculator Size an EV charger circuit from EVSE current and check breaker fit, panel capacity plus conductor ampacity and long-run voltage drop.
Transport EV Range Calculator Estimate reserve-aware EV range from usable battery energy and route consumption, then check trip margin and modeled arrival charge.
Education Early Math Worksheet Generator Create reproducible early-math worksheets with counting and number-sense practice plus teacher guidance and an optional printable answer key.
Pregnancy Edinburgh Postnatal Depression Scale (EPDS) Assessment Screen perinatal distress over the past seven days with the 10-item EPDS, clear follow-up ranges, and priority guidance for Question 10.
Finance Effective Interest Rate Calculator Convert a nominal interest quote to an effective annual rate and compare compounding schedules, equivalent quotes and real or holding returns.
Finance Effective Tax Rate Calculator Calculate effective tax rates from current bracket presets or completed totals with clear income bases, included taxes, and extra-income comparisons.
Transport Electric Vehicle (EV) Charging Time Calculator Estimate EV charging time from battery and power limits with taper and losses, then check added range, session cost and departure fit.
Electrical Electrical Box Fill Calculator Calculate NEC-style box fill from conductors and fittings, then compare required volume with the marked box capacity and available margin.
Electrical Electrical Panel Load Calculator Estimate dwelling electrical service demand from general and major loads, then compare the result with the entered rating and headroom target.
Email Email Header Analyzer Inspect raw email headers locally to trace relay delays and compare recorded SPF, DKIM and DMARC evidence while spotting sender mismatches.
Email Email Signature Generator Build a professional email signature with clean HTML and plain text, normalized contact links, and practical compatibility checks before pasting.
Finance Employee Total Cost Calculator Estimate the full annual employer cost of a role from pay, benefits, payroll burden and support costs with monthly and productive-hour views.
Productivity Employee Turnover Rate Calculator Calculate employee turnover for a defined period, compare separation categories, and catch denominator or headcount reconciliation problems.
Psychometrics Endorsed and Anticipated Stigma Inventory (EASI) Complete the 40-item EASI and compare five stand-alone stigma scales for qualified professional or research review without creating a total score.
Running Endurance Fuel Planner Plan fueling for one run or ride from hourly targets and real bottle or fuel portions, with sodium context and a timed intake schedule.
Devtools Environment Variable Inventory Checker Compare required environment variables with ENV, JSON, or YAML inventories and find missing, blank, placeholder, duplicate, or extra entries.
Networking Ephemeral Port Exhaustion Calculator Estimate ephemeral port pressure for a hot destination from connection churn, held time and source inventory with reserve and capacity thresholds.
Date Time Epoch Time Converter Convert epoch seconds, milliseconds, or a wall-clock date into UTC and selected-zone timestamps with explicit offset and precision rules.
Devops Error Budget Burn Rate Calculator Calculate SLO error-budget burn rate and compare page or ticket thresholds, then estimate runway from the budget that remains.
Devops Error Budget Calculator Calculate SLO error-budget use from observed traffic, compare burn and policy gates, and estimate runway before a release decision.
Coffee Espresso Shot Planner Plan an espresso shot from dose and brew ratio with a target yield, timing and flow reference plus temperature and pressure context.
Networking Ethernet Frame Efficiency Calculator Calculate Ethernet payload efficiency and goodput from frame size plus VLAN and wire-time overhead, then check whether a target rate fits.
Events Event Portable Toilet Calculator Estimate event portable toilets from peak crowd and duration, including accessible units and handwashing plus service and rental costs.
Productivity Event Schedule Generator Build an event run sheet from pasted session rows, keep fixed cues or continuous flow, and catch overlaps and tight handoffs before publishing.
Events Event Seating Capacity Calculator Estimate event guest capacity from usable floor area and layout density, then apply occupancy limits plus staff and reserved seats.
Editor Exchangeable Image File Format (EXIF) Viewer & Editor Inspect EXIF metadata locally, flag location and device details, then export a stripped or selectively edited image with an auditable privacy score.
Finance Expense Policy Checker Check expense rows against your receipt, approval, category, mileage, and duplicate rules while keeping policy exceptions visible for review.
Data Format Extensible Markup Language (XML) Converter Turn XML into structured JSON or record-based tables with local parsing, record-path selection, whitespace controls, and schema checks.
Electrical Extension Cord Voltage Drop Calculator Estimate extension-cord voltage drop and load voltage from copper AWG, length, and current with checks for heat loss and safe run length.
Exam Prep FAA Part 107 Remote Pilot Exam Prep Practice for the FAA Part 107 UAG test with 40 original questions, source-linked explanations and focused review of missed answers.
Exam Prep FAA Recreational Drone TRUST Exam Prep Review U.S. recreational drone safety with original TRUST practice questions and FAA-linked corrections, separate from official completion.
Finance Faraid Calculator Estimate common-heir Sunni Faraid shares after confirmed deductions and capped non-heir wasiat, with 'awl and residue review.
Body Metrics Fat-Free Mass Index (FFMI) Calculator Calculate raw or height-normalized FFMI from body-fat or fat-free-mass readings, with sensitivity ranges and goal projections.
Image Favicon Generator Turn one logo into a local favicon ZIP with profile-sized PNG and ICO assets plus ready-to-copy HTML links and manifest data.
Devtools Feature Flag Cleanup Checker Review feature flag inventories for stale rollouts, usage gaps, code references, dependencies, ownership gaps, and archive-ready cleanup work.
Home Improvement Fence Materials Calculator Estimate fence posts and style-specific infill from a measured run with gates and corners while accounting for waste, footing concrete, and material cost.
Gardening Fertilizer Solution Mix Calculator Build an elemental N-P-K fertilizer recipe from ppm targets and soluble product grades, with blend-fit and stock-concentration checks.
Networking Fiber Link Budget Calculator Calculate fiber link loss and receive power from datasheet and route values, then check operating margin plus reserve, reach and overload risk.
Trades Field Service Trip Charge Calculator Price a field-service trip from travel and onsite costs, then apply margin with minimums, timing premiums and a repair-credit policy.
Photography Field of View Calculator Calculate camera field width, height and angles from sensor size, focal length and distance, with optional target-fit checks and complete lens sweeps.
File Tools File Encryptor & Decryptor Encrypt a local file into an authenticated .stenc envelope or recover it in your browser with AES-GCM, PBKDF2 or Argon2id, and no upload.
Cryptography File Hash Generator Hash one local file in your browser and compare its full digest with SHA-2 or SHA-3 plus required RIPEMD-160 and legacy references.
Networking File Transfer Time Calculator Estimate file transfer time from size and sustained bandwidth while accounting for TCP limits, overhead, compression and a required finish window.
Storage File and Disk Size Converter Convert file and disk sizes between decimal and IEC units, then estimate usable capacity and allocation slack for storage planning.
File Tools File to PDF Converter Turn images and text sources into local PDF output while preflighting Office files for renderer needs, layout risks and fidelity limits.
Devops Filebeat Grok Pattern Generator Turn one representative log line into a Filebeat-ready Grok pattern with ECS-aware fields, local match checks, and optional ingest pipeline JSON.
Education Final Grade Calculator Find the final exam score needed for a target course grade using remaining-work estimates plus optional curves, buffers, and reachability checks.
Transport Finland AIS Vessel Tracker Find vessels in a Finnish AIS snapshot by identity or radius and review reported motion, position quality, speed bands and map context.
Quiz Fire Extinguisher Selection Quiz Practice U.S. fire extinguisher selection and evacuation decisions with 24 safety scenarios and explanations for missed answers.
Mindfulness Fireplace Screensaver Simulator Build a browser fireplace scene with seeded flames and particles, then compare scene-load guidance and actual frame-rate delivery.
Security Firewall Deny Log Analyzer Analyze firewall deny logs into ranked traffic paths using format-aware parsing, CIDR direction checks and transparent priority scores.
Security Firewall Rule Matrix Generator Build a reviewable firewall rule matrix from flow rows with least-privilege findings, deterministic risk cues, and platform handoff guidance.
Security Firewall Rule Review Report Review firewall rules for stale use and broad exposure while scoring expiry, ownership and privileged-service evidence into a cleanup queue.
Security Firewall Shadow Rule Checker Find full and partial firewall rule shadows in ordered IPv4 policy exports, with precedence-aware evidence and safer cleanup priorities.
Quiz First Aid Response Basics Quiz Review UK adult first-aid priorities with 12 original scenarios and answer explanations that help you identify what to practise next.
Education Five Number Summary Calculator Summarize pasted values with five key landmarks using a chosen quartile method and IQR outlier fences, then inspect spread in a clear box plot.
Finance Fixed Annuity Payout Calculator Estimate a term-certain fixed annuity payout from contract rate and payment timing, including fees and a chosen ending balance.
Finance Fixed Deposit Calculator Calculate fixed deposit maturity value from APR or APY using calendar crediting and payout choices plus tax, inflation, and coverage scenarios.
Home Improvement Flagstone Patio Materials Calculator Estimate a flagstone patio order from geometry and supplier coverage, including subsurface layers plus joint-fill and perimeter allowances with cost.
Education Flashcard Sheet Generator Create printable flashcard sheets from pasted or imported pairs with reproducible shuffling, duplex alignment checks, and text-fit warnings.
Aviation Flight Delay Tracker Check one flight and departure date against sample or provider data, then compare schedule differences and select the matching carrier route.
Aviation Flight Emissions Tracker Estimate flight CO2e from airport codes or manual distances and compare cabin, fuel and radiative-forcing scenarios with a leg-by-leg audit.
Aviation Flight Tracker Track an aircraft from an OpenSky state-vector snapshot and verify callsign or ICAO hex matches before comparing position, motion and freshness.
Home Improvement Flooring Calculator Estimate flooring boxes from measured area and carton coverage, then account for waste, full-box rounding, spare stock, tax, and cost.
Devtools Flowchart Generator Turn a reviewed text definition into a validated SVG flowchart, with reachability checks for every start-to-end process path.
Photography Focus Stacking Step Calculator Plan a macro focus stack from magnification and aperture, with a programmable rail step plus frame-count and travel estimates for the measured subject.
File Tools Font to WOFF2 Converter Convert an authorized TTF or OTF font to WOFF2 locally with checks for file size plus glyph, metric, table and variable-axis preservation.
Cooking Food Allergen Safety Quiz Practice U.S. food allergen safety with 24 original true-or-false questions, answer explanations and focused retries of missed questions.
Cooking Food Safety Basics Quiz Practice U.S. home food safety with 24 original scenarios, clear answer explanations and focused retries of the questions you missed.
Small Business Food Waste Cost Calculator Estimate the purchase cost of food waste by item and cause, then compare audit and annual savings under your chosen reduction target.
Quiz Forklift Safety Quiz Review U.S. forklift safety through 24 scenarios with explanations of hazards and training rules to guide further study of missed topics.
Education Fraction Practice Generator Generate reproducible fraction worksheets across eleven practice modes with exact answers and worked reasoning plus repeat checks for tight ranges.
Education Free Fall Calculator Calculate ideal free-fall time, impact speed, path length, peak height, and optional kinetic energy for a chosen gravity field.
Wireless Free Space Path-loss & RSSI Calculator Estimate free-space path loss and received signal strength with link reserve, signal-to-noise ratio and Fresnel clearance for RF planning.
Finance Freelance Hourly Rate Calculator Set a sustainable freelance hourly quote from annual income needs, business overhead and realistic billable capacity with tax and fee reserves.
Finance Freelance Tax Set-Aside Calculator Plan a 2026 freelance tax reserve from receipts and expenses with federal brackets, self-employment tax, safe-harbor options, and buffers.
Shipping Freight Class Density Calculator Calculate packed LTL freight density and screen a reference class, with mixed-unit worksheets and near-boundary quote warnings before carrier review.
Home Systems French Drain Materials Calculator Estimate French drain stone, pipe, fabric, required fall, and material cost from trench dimensions, outlet choice, and order units.
Cardio Training Friel Heart Rate Zone Calculator Turn a sport-specific lactate threshold heart rate into Joe Friel cycling or running zones, with whole-bpm boundaries and session planning.
Transport Fuel Efficiency Converter Convert MPG (US), L/100 km, and km/L with reciprocal formulas, clear direction guidance, and warnings for unusual or mistyped readings.
Finance Futures Contract P&L Calculator Calculate gross and net futures P&L from prices and contract specifications with checks for fees, ticks, margin and notional value.
Aviation G-Force Calculator Calculate acceleration and g ratios for speed changes, braking distance, cornering or rotation with unit conversion and clear safety limits.
Quiz GHS Hazard Pictograms Quiz Practice all nine GHS hazard pictograms with source-backed explanations, repeatable rounds, and focused replay of symbols you miss.
Education GPA Calculator Calculate a transcript-style GPA from course credits and grades with audited treatment of repeats, pass/fail marks and weighted-course bonuses.
Finance GST Calculator Calculate GST from tax-exclusive, tax-inclusive or tax-only amounts with quantity-aware rounding and a side-by-side scope check.
Gardening Garden Bed Planner Plan a raised bed or container garden from crop spacing and root space, then estimate plant capacity, seed needs and soil volume before planting.
Gardening Garden Calendar Planner Build a frost-aware vegetable garden calendar with crop start dates and succession cutoffs, plus weekly workload and generic-profile warnings.
Transport Gas Mileage Calculator Calculate MPG, L/100 km, and km/L from one matched trip or fill-up, then estimate fuel cost, tank range, and a reference gap.
Psychology General Self-Efficacy Assessment Score 10 general coping-confidence statements on the 10–40 GSE scale, with a 1–4 mean and clear guidance against invented high/low labels.
Psychology Generalized Anxiety Disorder (GAD-7) Assessment Score the GAD-7 for the last two weeks and compare anxiety symptom severity with the separate impact on work, home tasks, and relationships.
Energy Generator Watts Calculator Size generator running and starting wattage from a load inventory, with startup overlap and site-derating assumptions for equipment comparison.
Psychology Geriatric Depression Scale (GDS-15) Assessment Screen past-week depression-related responses in older adults with GDS-15, strict follow-up thresholds, and separate safety cues.
Devtools Git Branch Staleness Analyzer Review a dated Git branch inventory locally to find stale or diverged work, protect important names, and build a safer cleanup queue.
Devtools Git Diff Risk Analyzer Rank Git diff files by churn and repository risk signals, with transparent scores that guide owner review without claiming merge safety.
Quiz Git Fundamentals Quiz Practise Git commands and repository state with immediate explanations and repeatable rounds, without accessing your repositories.
Automation GitHub Actions Cache Config Generator Generate GitHub Actions cache YAML from ecosystem and lockfile choices, with ordered restore keys and security checks before you commit it.
Automation GitHub Actions Matrix Generator Build a GitHub Actions matrix workflow with accurate job expansion, exception rules, cache choices, and review checks before you commit.
Devops GlusterFS Volume Capacity Calculator Plan GlusterFS usable capacity from brick sizes and protected-set layout while checking stranded space, arbiter needs, and recovery headroom.
Devtools Go Struct Generator Generate Go structs from representative JSON or one PostgreSQL or MySQL table definition, with explicit field mappings and review notes.
Pets Goat Gestation Calculator Estimate a goat kidding window from an exact service date or exposure range, with published gestation profiles and optional herd milestones.
Photography Golden Hour Calculator Plan golden and blue hour windows for a location and date with custom sun-angle boundaries, ready-by times, direction and horizon cautions.
Game Golf Handicap Index Estimator Estimate a golf Handicap Index from 3 to 20 adjusted 18-hole scores using Rule 5.2 selection, differential math, and a clear audit trail.
Cardio Training Good VO2 Max by Age Lookup Find the Good VO2 max range for an adult age cohort and reference sex, then rate a measured value with exact source-table boundaries.
Exam Prep Google Associate Cloud Engineer Exam Prep Prepare for the standard Google Cloud Associate Cloud Engineer exam with 32 original scenarios, focused domain rounds and Google documentation links.
Exam Prep Google Cloud Digital Leader Exam Prep Practise Cloud Digital Leader business decisions with 48 independent questions, answer explanations and focused retries across six domains.
Exam Prep Google Professional Cloud Architect Exam Prep Practice Google Cloud Professional Cloud Architect decisions with original cases, immediate feedback and explanations of design trade-offs.
Exam Prep Google Professional Cloud DevOps Engineer Exam Prep Practise Google Cloud DevOps exam decisions with 30 original scenarios, source-linked explanations and focused retries for missed answers.
Exam Prep Google Professional Cloud Security Engineer Exam Prep Review Google Cloud Professional Cloud Security Engineer decisions with 25 original scenarios, blueprint-weighted rounds and source-linked explanations.
Exam Prep Google Professional Data Engineer Exam Prep Study Google Cloud Professional Data Engineer v4.2 with 30 original architecture scenarios, documented explanations and a domain-weighted practice score.
Education Grade Calculator Calculate a course grade from points, percentages or letters and test weighting rules, dropped work and the average needed on remaining work.
Running Grade-Adjusted Pace Calculator Estimate flat-equivalent running pace and time from a steady uphill or downhill grade, with an optional same-effort slope comparison.
Devtools GraphQL Formatter Format GraphQL operations and schema SDL locally, with readable or compact output, definition inventory and lexical checks for review.
Home Improvement Gravel Calculator Estimate gravel volume and mass from area and depth using bulk density, then apply supplier minimums, order increments and material costs.
Exam Prep Great Britain Car Driving Theory Exam Prep Practise Great Britain car theory with 42 original Highway Code questions and source-linked explanations in untimed study rounds.
Gardening Greenhouse Heating Load Calculator Estimate greenhouse heat loss and delivered heater capacity, with covering and leakage breakdowns plus fuel-use and cost scenarios.
Gardening Greenhouse Supplemental Light Runtime Calculator Estimate greenhouse lamp runtime from daily light targets, with fixture sizing and energy use that account for sunlight and allowed hours.
Gardening Greenhouse Ventilation CFM Calculator Estimate greenhouse exhaust airflow and intake area from a summer or custom air-change target, then compare candidate fan ratings.
Coffee Grind Size Chooser Choose a coffee grind size from brew method and measured time with taste feedback, calibrated grinder mapping, and clear dial-in warnings.
Gardening Growing Degree Days Calculator Calculate growing degree days from dated weather rows, compare averaging methods and temperature caps, and track progress toward stage checkpoints.
Body Metrics Growth Chart Report Generator Review pediatric growth visits with estimated percentiles, height velocity, BMI flags, and clear prompts to confirm results on official charts.
Body Metrics Growth Percentile Trend Calculator Review a child's height, weight or BMI percentile path across visits with WHO/CDC references plus band-crossing alerts and trend context.
Body Metrics Growth Screening Flag Checker Screen serial child growth measurements for percentile drift and low height velocity, with age-routed adiposity checks and data-quality flags.
Body Metrics Growth Velocity Calculator Calculate child height or weight velocity across visits, compare intervals with a clearly labeled screening model, and flag sustained change patterns.
Body Metrics Growth Z-Score Calculator Place a child's height, weight or BMI on age- and sex-specific WHO or CDC curves with z-score, percentile and reference-gate context.
Education Guided Reading Groups Planner Build flexible guided reading groups from roster evidence and available texts, then test weekly teacher-table capacity before using the draft.
Small Business Gutter Cleaning Quote Calculator Build a gutter cleaning quote from measured run length and job conditions, with labor-cost checks, margin floors and a site-risk review.
Home Improvement Gutter Downspout Calculator Size and place gutter downspouts using roof area and rainfall, check leader capacity and spacing, then estimate gutter and hardware quantities.
HTTP Gzip Compression Checker Check a public URL or pasted headers for gzip, Brotli, or identity compression with cache-variation checks and measured byte savings.
Encoding Gzip Text Decompressor Decompress gzip, zlib or raw deflate into readable text in your browser with wrapper checks, byte counts and strict encoding options.
Devops HA Failover Budget Calculator Calculate a serial HA failover budget, compare every recovery phase with an RTO and safety reserve, and identify the longest delay.
Networking HA Pair Role Consistency Checker Check HA peer snapshots for ownership drift, standby readiness, stale synchronization and heartbeat failures with service and priority evidence.
HTTP HAProxy Backend Config Generator Build an HAProxy backend block from server rows with health checks and TLS trust choices, then review capacity limits and deployment warnings.
Data Format HCL Converter Convert Terraform-style HCL into JSON or flat configuration text, with path and type checks that expose lossy handoffs before reuse.
Finance HELOC Payment Calculator Model a HELOC draw-to-repayment schedule with rate scenarios and dated balance changes, then see payment shock, fees and any balloon.
Date Time HIIT Workout Timer Plan and run a HIIT workout with named exercises plus warm-up and cooldown phases, work-density checks, and clear live interval cues.
Security HMAC Generator Generate and verify HMAC values from text or local files with exact byte encodings, SHA choices, header prefixes, and local secret handling.
Devtools HTML Boilerplate Generator Build an HTML starter document with semantic body structure and escaped metadata, then review script loading choices and publication warnings.
Devtools HTML DOM Comparator Compare two HTML documents or fragments as parsed DOM trees and review path-level changes with explicit whitespace and attribute rules.
Encoding HTML Entity Lookup Look up an HTML entity or Unicode value, then compare named and numeric forms with context-safe escapes for copying into markup and code.
Encoding HTML Escape and Unescape Tool Escape HTML for text or quoted attributes, decode nested character references locally, and flag unresolved, markup, or script-shaped output.
Devtools HTML Formatter Format HTML documents or fragments as inert local text, with selectable indentation and balance signals for tags that still need review.
Devtools HTML Minifier Minify HTML locally with configurable spacing and comment rules, byte-savings metrics, and warnings for risky markup changes.
Text HTML Tag Stripper Turn HTML into readable plain text in your browser while preserving useful structure and reviewing links, image text and hidden content.
Encoding HTML Unescaper Decode escaped HTML text or small local files with multi-pass reference tracking plus strict review, Unicode normalization, and safety signals.
Devtools HTML Validator Check pasted or local HTML in document or fragment mode with line-aware findings and strict review signals without executing code in your browser.
Devtools HTML to JSX Converter Turn HTML or SVG into reviewable JSX with local parsing, React attribute mapping, style policies, and warnings for copied event code.
Text HTML to Markdown Converter Turn HTML into destination-ready Markdown with dialect and table controls plus warnings when complex structure may not survive conversion.
HTTP HTTP Access Latency Log Analyzer Analyze NGINX, Apache, or ALB access logs locally for endpoint P95 and 5xx rates with clear parse-gap evidence and SLA findings.
HTTP HTTP Security Headers Checker Audit pasted HTTP security headers for browser policy, session protection and exposure risks with local scoring and a prioritized fix order.
HTTP HTTP Status Codes Quiz Practice 32 HTTP status codes with recognition questions and web scenarios, then review explanations and retry the distinctions you missed.
Education HVAC Sizing Calculator Estimate room or zone cooling capacity from area and ceiling height with exposure and envelope adjustments plus people and equipment heat.
Quiz Handwashing Basics Quiz Test everyday handwashing knowledge with 24 true-or-false statements on technique and sanitizer limits, then review explanations and retry misses.
Trades Handyman Quote Calculator Build a handyman quote from labor and materials, apply fees and tax rules, then check contribution margin before sending the price.
Education Hash Table Operations Simulator Trace hash-table insert, search, and delete operations across chaining and probing strategies with collision and tombstone evidence.
Cryptography Hash Type Identifier Identify likely hash formats from pasted values or local text files with confidence labels, cleanup clues and browser-local analysis.
Exam Prep HashiCorp Vault Associate Exam Prep Practise HashiCorp Vault Associate (003) for Vault 1.19 with 36 original questions across nine objective groups and versioned documentation links.
Productivity Headcount and FTE Calculator Calculate headcount and weekly FTE from roster rows with contractor and overtime policies, then compare capacity by group and audit rejected rows.
Education Heap Operations Simulator Build min or max heaps and trace insert, peek, and extract operations with synchronized array and tree views plus comparison and swap counts.
Quiz Hearing Protection Quiz Practice hearing-protection decisions with 20 scenarios on noise controls and protector fit, then review explanations for missed answers.
Cardio Training Heart Rate (HR) Zones Calculator Calculate heart-rate zones from age or a measured maximum using percentage-of-max or heart-rate-reserve methods and optional session planning.
Breathwork Heart Rate Variability (HRV) Resonance Finder Estimate a starting HRV resonance breathing pace from resting profile inputs, with cycle timing, nearby trials and clear comfort warnings.
Quiz Heat Illness Prevention Quiz Practise heat illness prevention with 18 workplace scenarios and explanations that help you review unsafe actions and emergency responses.
Energy Heat Pump Savings Calculator Estimate heat pump operating savings and simple payback using fuel use and seasonal efficiency, with utility rates and backup heat included.
Electrical Heatsink Thermal Resistance Calculator Size or check a heat sink from power, ambient and junction limits using the full thermal-resistance path plus airflow planning factors.
Body Metrics Height-for-Age Percentile Calculator Check a child’s height-for-age percentile and z-score against WHO or CDC references, with measurement-method alignment and uncertainty.
Devops Helm Values Schema Validator Validate values.yaml against values.schema.json, separate blocking schema errors from hygiene warnings, and inspect root-key coverage before CI.
Education High School GPA Calculator Calculate weighted and unweighted high school GPA from transcript rows, then audit course policies and estimate the lift toward a target.
Electrical Home EV Charger Install Cost Calculator Estimate a home EV charger installation budget from circuit size and wire route with panel work, labor, permits and uncertainty included.
Quiz Home Electrical Safety Quiz Practice recognizing U.S. home electrical hazards with 24 scenarios and explanations of safer choices and when to seek qualified help.
Household Home Emergency Preparedness Quiz Practice U.S. home emergency decisions with 32 original questions and explanations to help you review gaps in preparedness knowledge.
Finance Home Equity Calculator Estimate home equity, combined loan-to-value and borrowing headroom, then test how property-value changes affect every result.
Quiz Home Fire Escape Planning Quiz Check your home fire escape planning knowledge with 28 original U.S.-based questions, explanations and focused practice on missed answers.
Finance Home Office Deduction Calculator Compare 2025 U.S. home office deduction methods using eligibility, business-use allocation and income-limit checks for a filing-focused estimate.
Psychometrics Hospital Mental Health Risk Screen (HMHRS) Score ten HMHRS responses and identify the VA Low, Medium or High risk range with non-diagnostic context for qualified hospital use.
Sysadmin Hostname Naming Standard Checker Audit hostname inventories against RFC and Kubernetes syntax, organization regex rules and duplicate policy with browser-local evidence.
Home Improvement House Wrap Rolls Calculator Estimate house wrap rolls from wall geometry and printed roll size with whole-roll rounding plus seam, flashing-tape, and fastener checks.
Devtools Hreflang Tag Generator Build reciprocal hreflang clusters from locale and URL rows with HTML, sitemap, or HTTP output plus self-reference and duplicate checks.
Home Systems Humidifier Size Calculator Estimate humidifier output from room conditions and air replacement, separating first-day moisture demand from ongoing maintenance.
Quiz Hurricane Preparedness Quiz Check your U.S. hurricane preparedness knowledge with 32 original questions and explanations covering evacuation, shelter and recovery.
HTTP Hypertext Transfer Protocol (HTTP) Header Checker Check a public URL’s HTTP headers across redirects and review security, cache behavior, browser state and cross-origin exposure.
Diagnostics Hypertext Transfer Protocol (HTTP) Redirect Checker Trace a public HTTP redirect chain hop by hop to identify loops and HTTPS downgrades, compare timing and generate a replayable cURL command.
Security IAM Policy Permissions Analyzer Review AWS IAM policy JSON for wildcard breadth, privilege paths, and policy-shape issues before validating effective access in AWS.
Security IAM Policy Wildcards Checker Check AWS IAM policy JSON for wildcard permissions and broad PassRole exposure, then rank the statements that need least-privilege remediation.
Quiz ICAO Phonetic Alphabet Quiz Practice all 26 ICAO spelling words in either direction with text questions, corrective explanations and focused retries of missed answers.
Data Format INI Converter Convert INI or CFG into structured or flat configuration text with explicit duplicate handling, type inference, and skipped-line review.
Storage IOPS / MBps / GB-per-day Converter Convert IOPS, throughput, and daily volume from I/O size and active hours, then check reserve-adjusted ceilings and cloud disk limits.
IP Addressing IP Address to Decimal Converter Convert one IPv4 value across dotted, integer and bit-oriented forms with special-range labels plus optional signed and byte-order checks.
Networking IP Overlap Checker Check IPv4 CIDRs and ranges for exact duplicates, containment, partial overlap, host-bit corrections, and duplicate address coverage.
Wireless IP3 and SFDR Calculator Estimate IIP3 and OIP3 with IM3 clearance and SFDR for an equal-tone RF test based on gain, noise bandwidth and detection margin.
Psychology IPIP Big-Five Factor Markers (50-Item) Complete the 50-item IPIP Big-Five markers and compare five separately keyed trait totals and means without invented types or population norms.
Psychology IPIP Interpersonal Circumplex (32-Item) Complete the 32-item IPIP Interpersonal Circumplex and compare eight continuous octant totals without invented types, norms, or cutoffs.
Psychology IPIP Personality Inventory (IPIP-NEO-60) Assessment Build a 60-item Big Five profile with reverse-keyed domain means and two-item facet clues, while keeping non-normative limits clear.
Psychometrics IPIP Potential Emotional Intelligence Components Complete 68 IPIP items and compare seven emotional-component totals and averages without inventing an overall EQ score, cutoff, or ability rank.
Networking IPsec Overhead Calculator Calculate a safe IPsec inner MTU and TCP MSS from the ESP profile and path budget, including NAT-T, padding and optional reserve bytes.
IP Addressing IPv4 Allocation Planner Allocate IPv4 subnets in an ordered parent CIDR, with exact usable ranges and checks for VLSM fit, alignment gaps and remaining space.
Networking IPv4 Renumbering Planner Build dependency-ordered IPv4 renumbering waves with CIDR and DNS/DHCP timing checks, window-fit rules and rollback-ready runbooks.
IP Addressing IPv4 Subnet Allocation Planner Size and place IPv4 child subnets from host demand, with growth headroom and reservation rules that expose gaps, overflow and usable ranges.
Quiz IPv4 Subnetting Quiz Practice IPv4 subnetting from /0 to /32 with explained answers and repeatable rounds that let you retry only the questions you missed.
Networking IPv4 Supernet Calculator Summarize IPv4 CIDR blocks as one cover route or an exact aggregate set, with normalization and clear warnings for addresses exposed by gaps.
IP Addressing IPv6 Address Compressor / Expander Normalize one IPv6 literal into canonical compressed and expanded forms with preserved prefix and zone context plus binary and reverse-DNS views.
IP Addressing IPv6 Address and Subnet Calculator Calculate an IPv6 network from an address and prefix, then review canonical boundaries, child-prefix capacity and reverse DNS or EUI-64 guidance.
Networking IPv6 Prefix Plan Calculator Plan site and LAN prefixes from an assigned IPv6 CIDR, check demand against bit capacity, and build a normalized allocation ledger.
Coffee Iced Coffee Flash Brew Calculator Plan flash-brew iced coffee with a balanced coffee dose and hot-water-to-ice split plus pour timing and an idealized chill estimate.
Body Metrics Ideal Weight Calculator Compare four classic ideal-weight formulas by adult height, then place their spread beside a BMI corridor and optional current-weight context.
Image Image Annotation Editor Annotate common raster images locally with drawing marks and callouts, then control layer order and export the finished PNG without uploading the source.
Image Image Background Remover Remove simple image backgrounds in your browser, tune color and edge masking, and review transparency before downloading a PNG cutout.
Image Image Color Adjuster Adjust image color in your browser, review brightness and hue changes with clipping evidence, then export a transparent PNG or WebP or a JPEG.
Image Image Color Picker Pick colors from local images using exact coordinates and area averaging or median sampling, with alpha handling and reusable CSS tokens.
Image Image Comparator Compare two equal-size images locally using channel tolerance and transparency rules, then inspect a highlighted diff with exact pixel-change metrics.
Image Image Compressor Compress one image locally in your browser, compare size and visual quality, then download a resized or reformatted copy with metadata controls.
Editor Image Cropper Crop one image locally with exact aspect and pixel controls, then review upscaling and transparency along with quality or file-budget risks.
Image Image Format Converter Convert one image locally with format, resize, crop, quality, and transparency controls while checking the actual output and byte size.
Image Image Grid Splitter Split one local image into an ordered ZIP of whole-pixel tiles with gutter and remainder controls plus PNG, JPEG or WebP output.
Image Image Merger Merge two to twelve local images into one ordered composition, with contain-or-crop fitting plus controllable spacing and background.
Image Image Metadata Stripper Strip hidden metadata from an image in your browser and create a clean JPEG, PNG, or WebP copy with a check for remaining privacy markers.
Image Image Region Obscurer Obscure selected areas of a local image with pixelation, blur, or opaque covers, then flatten and review the result before sharing.
Image Image Resizer Resize one image locally, compare fit or crop geometry, and tune format quality against a file-size target before downloading.
Image Image Watermarker Add text or logo watermarks to up to ten images in your browser, preview every result, and keep the source files private and unchanged.
Encoding Image to Base64 Encoder Turn an image into Base64 or a Data URI in your browser, preserve the original bytes or optimize the image, and judge whether inline use fits.
Image Image to SVG Vectorizer Turn raster artwork into editable SVG paths in your browser with monochrome or limited-color tracing, local processing, and geometry checks.
Image Images to GIF Maker Build an animated GIF from ordered images in your browser with per-frame timing, canvas fit and palette control plus verified size checks.
Productivity Images to Slideshow Creator Turn ordered images into an editable PowerPoint slideshow with chosen slide proportions, image placement and captions plus crop review.
Electrical Impedance Calculator Calculate ideal series RLC impedance from reactances or component values with phase, power factor, current and resonance results.
Security Incident Action Items Tracker Turn incident action rows into due-state and owner follow-up views with blocker, missing-detail, stale-overdue and workload checks.
Devops Incident MTTx Metrics Calculator Calculate incident MTTx metrics from lifecycle CSV rows, then compare means and tail percentiles with strict acknowledgement and recovery targets.
Devops Incident Timeline Report Turn incident notes into a sorted chronology with phase coverage, evidence gaps and response-cadence checks for a review-ready handoff report.
Finance Income Tax Calculator Estimate income tax with current tables for four jurisdictions or a custom table and compare bracket slices with an added-income scenario.
Exam Prep Infrastructure as Code Exam Practice Practise Terraform Associate (004) concepts with original single-answer questions and source-linked explanations to guide your next study session.
Education Insulation Calculator Estimate insulation packages from measured area and label coverage, then compare added R-value with climate references and modeled heat loss.
Networking Interface Description Standard Checker Check network interface descriptions for endpoint evidence and policy gaps, then prioritize duplicates or length issues before cleanup and change review.
Nutrition Intermittent Fasting Planner Plan daily intermittent fasting windows from a first-meal time with weekend shifts, personal duration ceilings and safety-focused checks.
Finance Internal Rate of Return Calculator Calculate periodic IRR for ordered cash flows and inspect every validated root, comparison NPV and convergence result before making a decision.
Psychometrics International Adjustment Disorder Questionnaire (IADQ) Complete the 19-item IADQ to review symptom severity and its five-requirement probable-pattern algorithm with in-tab processing.
Psychometrics International Anxiety Questionnaire (IAQ) Record IAQ anxiety symptoms over several months and review the 0–32 severity total alongside the published diagnostic-rule conditions.
Psychometrics International Prolonged Grief Questionnaire (IPGDS) Record 14 past-week grief responses and review the 13-item severity sum, impairment, and cultural context without applying a diagnostic cutoff.
Psychometrics International Trauma Questionnaire (ITQ) Complete the finalized ITQ and review PTSD and DSO symptom scores with the published algorithm and a provisional PTSD/CPTSD pattern.
Psychometrics International Trauma Questionnaire with Clinical Checks (ITQ-CC) Complete the public-domain ITQ-CC with conditional clinical checks, two symptom totals, and a provisional PTSD or CPTSD requirement trace.
Psychometrics International Trauma Questionnaire — Child and Adolescent Version Administer the ITQ-CA for ages 7–17 to trace symptom domains, impairment, and the PTSD/CPTSD questionnaire algorithm under supervision.
IP Addressing Internet Protocol (IP) Geolocation Finder Check a public IP, hostname or URL for approximate location and network-owner clues with optional reverse DNS and clear evidence limits.
IP Addressing Internet Protocol version 4 (IPv4) Subnet Calculator Calculate an IPv4 subnet boundary from CIDR or a dotted mask, then check usable hosts, special-purpose ranges and reserve-adjusted capacity.
IP Addressing Internet Protocol version 4 (IPv4) Subnet Split Calculator Split an IPv4 parent block into equal CIDR children and check usable hosts, gateway placement and capacity fit across the complete subnet plan.
Productivity Interview Questions Generator Build a structured interview guide from a role or research brief with tailored questions, timed probes, scoring anchors, and bias checks.
Ecommerce Inventory Carrying Cost Calculator Calculate annual inventory carrying cost from average stock and measured component rates, then compare margin drag and reduction scenarios.
Small Business Inventory Reorder Point Calculator Calculate when to reorder a SKU and how much to buy using demand and lead-time variability, current inventory position, and supplier pack rules.
Finance Invoice Due Date Calculator Calculate an invoice due date from Net, end-of-month or business-day terms with explicit weekend and holiday rules plus an auditable date path.
Finance Invoice Late Fee Calculator Calculate an invoice late fee from the outstanding balance and chargeable days, with your rate method plus any minimum, cap and rounding rule.
Gardening Irrigation Runtime Calculator Calculate sprinkler or drip runtimes from crop water demand and measured delivery, including efficiency losses, rainfall and cycle-soak limits.
Data Format JSON Converter Convert JSON or JSON Lines into tables and handoff text with record-path selection, flattening controls and warnings for sparse or risky data.
Data Format JSON Diff Comparator Compare JSON as parsed structures with configurable array matching and ignored paths, then review exact changes through path and patch evidence.
Data Format JSON Formatter Format JSON for review or transport, inspect its structure and byte size, and flag duplicate keys or precision risks before reuse.
Data Format JSON Repair Tool Turn malformed JSON-like text into strict JSON locally, with selectable repair modes and clear warnings for inferred changes and data risks.
Data Format JSON Schema Breaking Changes Checker Compare released and proposed JSON Schemas to find contract-breaking validation and reference changes before clients or stored data are affected.
Data Format JSON Schema Generator Turn sample JSON into a draft-aware JSON Schema with explicit inference choices and review warnings for assumptions that need broader test data.
Data Format JSON Sorter Sort JSON and clean JSONC in your browser with repeatable key rules, duplicate-name warnings, and optional record-array ordering.
Data Format JSON Validator Validate strict or human-friendly JSON locally, catch syntax and interchange risks, and produce a reviewable strict JSON artifact for handoff.
Data Format JSON to CSV Converter Turn JSON or JSON Lines into spreadsheet-ready CSV or TSV with controlled record selection, nested-value shaping and formula-risk warnings.
Data Format JSON to Dart Converter Turn representative JSON into reviewable Dart model classes with configurable null safety, exact key mappings and actionable inference warnings.
Data Format JSON to TypeScript Converter Turn JSON or JSON Lines samples into TypeScript declarations with configurable null and optional-property policies plus array inference and runtime guards.
Devtools JSON-LD Generator Generate page-matched JSON-LD for common article, product, organization and FAQ pages with a property audit and copy-ready script tag.
Data Format JSONPath Tester Test JSONPath expressions on local JSON, inspect matched values with paths and pointers, and distinguish empty results from syntax errors.
Devtools JUnit Test Report Analyzer Analyze JUnit XML locally for pass rates and release gates with focused triage for failures, retries, skipped cases and slow tests.
Encoding JWK To PEM Converter Convert one JWK or a selected JWKS key into SPKI public or PKCS#8 private PEM with local processing and auditable key fingerprints.
Security JWT Claims Risk Checker Check JWT headers and claims against issuer, audience, time, algorithm, replay, exposure, and token-profile rules without uploading the token.
Security JWT Decoder Decode a compact or Bearer JWT locally and inspect readable claims with focused checks for timing, identity, lifetime and unverified signatures.
Devtools JavaScript Formatter Format JavaScript locally without running it and control indentation, brace placement, preserved newlines, and preferred line wrapping.
Devtools JavaScript Minifier Minify JavaScript locally with Terser profiles and raw-versus-gzip size comparisons, plus syntax diagnostics and source-map exposure warnings.
Devtools JavaScript Obfuscator Obfuscate JavaScript locally with repeatable profiles, runtime targets, reserved names, and size checks while keeping secrets out of source.
Devtools JavaScript Validator Check JavaScript syntax and selected defect rules by ECMAScript edition and environment without executing or rewriting the source.
Networking Jumbo Frame Savings Calculator Estimate how jumbo frames reduce packet rate and repeated Ethernet overhead for eligible traffic, with path-risk and optional CPU relief checks.
Small Business Junk Removal Quote Calculator Estimate a junk removal quote from load volume and job conditions, including disposal costs, payload checks and modeled contribution margin.
Devops Kafka Partition Count Calculator Plan a Kafka topic partition count from throughput and consumer parallelism, then check broker spread and keying risk before rollout.
Networking Keepalived VRRP Config Generator Generate a Keepalived VRRP configuration for one node with validated peer settings, health tracking, and an estimated failover interval.
Psychology Kessler Psychological Distress Scale (K10) Assessment Measure distress frequency over the past four weeks with K10, compare two published band guides, and review the complete response pattern.
Psychology Kessler Psychological Distress Scale (K6) Screener Screen past-30-day psychological distress with the six-item K6 total, clear 5 and 13 cutoffs, and non-diagnostic follow-up guidance.
Data Format Key-Value Config Converter Convert INI, Java properties, and dotenv text into reviewable structured or line-based configuration with path and duplicate checks.
Game Knockout Advancement Calculator Work out which team advances from a two-leg tie, with configurable away-goals, extra-time and penalty-shoot-out rules plus a scoreline map.
Devops Kubernetes Cluster Capacity Calculator Estimate a rollout-safe Kubernetes replica ceiling from allocatable resources and pod requests, then test node loss and disruption limits.
Devops Kubernetes Deployment Generator Build Kubernetes Deployment YAML with optional Service and policy resources, plus checks for rollout, probes, resources, and security choices.
Devops Kubernetes Deprecated APIs Checker Check Kubernetes manifests for APIs removed by a target release, distinguish blockers from later cleanup, and review documented migration cues.
Devops Kubernetes Events Timeline Analyzer Turn Kubernetes Event text or JSON into a repeat-aware timeline with warning concentration, reason groups, and object hot spots.
Devops Kubernetes NetworkPolicy Generator Build Kubernetes NetworkPolicy YAML from pod labels and allow rules with selector checks, rollout guidance, and security review warnings.
Devops Kubernetes Pod Security Context Checker Check Kubernetes workload YAML for inherited security contexts, Pod Security gaps, weighted findings, and a hardening fragment for manual review.
Devops Kubernetes Resource Requests Checker Check Kubernetes manifests for missing resource requests and invalid limits, with QoS clues and scheduler-footprint evidence before rollout.
Devops Kubernetes Upgrade Skew Calculator Check Kubernetes component version skew for the next minor upgrade hop, with compatibility windows, blockers and an ordered rollout plan.
Exam Prep Kubernetes and Cloud Native Associate Exam Prep Practise KCNA concepts with original questions and blueprint-weighted rounds, then use explanations to review mistakes across four domains.
Networking LACP Bundle Capacity Calculator Calculate usable LACP bundle capacity after failed links, reserve, and hash-efficiency discounts while checking aggregate and single-flow headroom.
Energy LED Savings Calculator Estimate annual LED energy and bill savings from your lighting schedule, then compare upgrade cost, simple payback and long-term net benefit.
Editor LaTeX Editor Write and preview LaTeX equations with useful notation menus, native source exports, structural checks, MathML and supported AsciiMath conversions.
LaTeX LaTeX Table From CSV Generator Turn delimited rows into LaTeX table source with quoted-field parsing, special-character escaping, and warnings for uneven data.
Education Laboratory Dilution Calculator Build a direct or equal-factor serial dilution plan with unit-aware stock and diluent quantities plus staged replicate totals for protocol review.
Tools & Equipment Ladder Reach Calculator Choose a ladder size for roof access or elevated work using reach geometry and standing limits, with load-rating and electrical-hazard checks.
Quiz Ladder Safety Quiz Practise U.S. construction ladder safety with original questions and explanations to review inspection, setup and load decisions.
Ecommerce Landed Cost Per Unit Calculator Calculate landed cost per unit across goods and import charges, then test gross margin and the selling price required for a chosen target.
Gardening Landscape Rock Coverage Calculator Estimate how much landscape rock to order from bed area and installed depth, then account for bulk density, reserve and supplier rounding.
Devtools Large Language Model (LLM) Usage Cost Calculator Estimate monthly LLM API cost from token use, caching and retries with budget checks plus same-workload model price comparisons.
Crafts Laser Cut Settings Estimator Estimate laser-cut starter settings for CO2 or diode machines and compare power-speed-pass variations with focus, kerf, and safety guidance.
Education Late Work Penalty Calculator Apply a course late-work policy to due and submission times with grace and counting rules plus deduction limits and final-score rounding.
Gardening Lawn Fertilizer Bags Calculator Calculate lawn fertilizer bags from label coverage or a nitrogen target, then audit N-P-K rates and see bundle-rounded cost and leftovers.
Small Business Lawn Mowing Quote Calculator Build a lawn mowing quote from turf area and service scope using route and operating costs, then protect the minimum charge and gross margin.
Gardening Lawn Seed Calculator Calculate grass seed and whole bags for a new lawn, overseeding or repairs with label-rate, pure-live-seed and bundle adjustments.
Body Metrics Lean Body Mass Calculator Estimate adult lean body mass from height and weight, compare four published equations, or use body-fat routes with FFMI and method-spread checks.
Education Learning Quiz Pack Generator Build repeatable visual-literacy quiz packs from flags and map outlines plus semaphore, maritime signals and Braille with seeded answer keys.
Photography Lens Equivalence Comparator Match framing across camera formats through exact focal length and depth-of-field look, with crop adjustments and a practical lens choice.
Education Letter Tracing Sheet Generator Create printable letter tracing sheets with learner-sized guides, case and practice choices, formation cues, and repeatable seeded versions.
Psychology Life Orientation Test-Revised (LOT-R) Assessment Reflect on general future expectations with the 10-item LOT-R and receive a continuous 0-to-24 optimism score with no invented cutoff.
Education Linear Data Structure Operations Simulator Trace list, stack, queue, and deque operations across linked and bounded-array representations with endpoint and invariant evidence.
Shell Linux Command Line Quiz Practise Linux command choices and predict their effects with 48 GNU/Linux questions, explanations and retries without executing commands.
Exam Prep Linux Foundation Certified System Administrator Concepts Exam Prep Review LFCS concepts with 34 unofficial multiple-choice questions and source-linked explanations before separate hands-on Linux practice.
Networking Load Balancer Failover Time Calculator Estimate user-visible load balancer failover time across health checks, routing changes, DNS cache exposure, and an RTO target.
Networking Load Balancer Pool Capacity Calculator Estimate weighted load balancer pool capacity from measured backend RPS and routing weights, with bottleneck and N+ failure-reserve checks.
Quiz Lockout/Tagout Safety Quiz Review U.S. lockout/tagout principles with 30 original practice questions and explanations to identify gaps in hazardous-energy knowledge.
Devops Log Sampling Rate Calculator Calculate a log sampling rate that fits a daily storage target while reserving critical records and accounting for bursts and index overhead.
Puzzles Logic Grid Puzzle Generator Generate a replayable logic grid puzzle from equal-sized categories with seeded clues, a printable sheet, and a uniqueness check.
Education Long Division Calculator Calculate whole-number long division with quotient and remainder, decimal continuation plus repeat detection and an exact answer check.
Text Lorem Ipsum Generator Generate repeatable lorem ipsum for layout testing with paragraph, sentence, or word targets and adjustable vocabulary and formatting.
Education Lumber Calculator Plan how many stock boards to buy for repeated cuts with saw kerf and waste allowance, then price the rounded supplier quantity.
Diagnostics MAC Address Details Lookup Inspect a MAC or EUI address with normalized forms and first-octet flags plus special-use checks and optional vendor assignment evidence.
Networking MAC Address Generator Generate repeatable MAC address batches for labs and fixtures with prefix control and address-class flags, plus notation and duplicate checks.
DNS MTA-STS Validator Check an email domain's MTA-STS TXT and HTTPS policy, then review MX patterns and the policy-host certificate before enforcement.
Networking MTU MSS Calculator Calculate a TCP MSS clamp from path MTU and encapsulation overhead, with IPv4 or IPv6 header budgets, floor checks and probe guidance.
Diagnostics MX Record Lookup Inspect a domain's MX route and compare public DNS answers while catching Null MX conflicts, unresolved exchanges, and alias targets.
Crafts Macrame Cord Length Calculator Plan macrame cord cuts and spool purchases from finished size and mount style, including knot-density estimates plus fringe and reserve.
Nutrition Macro Target Calculator Calculate daily calories and protein, carbohydrate, and fat targets from body metrics with selectable energy formulas and planning safeguards.
Devops Maintenance Window Conflict Checker Check maintenance schedules for time overlap, shared services or owners, blackout conflicts, guard-buffer near misses, and concurrency spikes.
Finance Malaysia PCB Calculator Calculate 2026 Malaysia PCB/MTD for salary and bonus payroll using TP1/TP3 records, EPF values and auditable statutory formula variables.
Finance Malaysia Tax Deductions and Reliefs Calculator Estimate Malaysia YA 2024 or 2025 chargeable income, applying resident relief limits and the 10% cap for qualifying donations.
Quiz Map Outlines Quiz Practice US state, territory, and world-country silhouettes in seeded rounds with immediate corrections and focused missed-outline replay.
Cardio Training Marathon Pace Predictor Predict marathon finish time and pace from an eight-week training block, with study-range context and even-effort checkpoint splits.
Running Marathon Training Schedule Planner Build a race-date marathon schedule from your current base with capped progression, cutbacks and taper weeks plus clear training guardrails.
Quiz Maritime Signal Flags Quiz Practice all 26 ICS letter flags and ten numeral pennants with repeatable rounds, immediate feedback, and missed-signal replay.
Text Markdown Formatter Format Markdown locally under CommonMark or GFM rules while protecting code fences and controlling prose wrapping with targeted review notes.
Text Markdown Linter Check Markdown against CommonMark or GFM rules, tune severities and overrides, and review line-level findings without changing the source.
Text Markdown Previewer Preview Markdown locally with GFM or CommonMark rules and sanitized HTML, plus structure checks and review notes before reusing the markup.
Text Markdown Table Generator Turn delimited text into clean Markdown tables with automatic header and alignment choices plus parsing warnings for ambiguous or uneven rows.
Text Markdown to HTML Converter Convert Markdown into a reusable HTML fragment or full document with flavor selection, raw-HTML controls and a sanitized local preview.
Education Marking Time Calculator Estimate total marking hours and daily pace from a timed sample, then compare buffered workload with focused capacity before the deadline.
Finance Markup Calculator Calculate markup and margin from unit costs and selling price, then solve break-even or target list prices with fees, discounts and upward rounding.
Education Math Function Plotter Plot up to four Cartesian or polar functions with bounded expression parsing, adjustable sampling, and audits for invalid or clipped points.
Editor MathML Editor Edit and preview MathML locally with native notation menus, complete markup checks, source and image exports, and supported LaTeX or AsciiMath conversions.
Education Matrix Operations Calculator Run bounded matrix arithmetic and linear solves with dimension checks, then review pivot tolerance, residuals and condition evidence.
Game Matrix Screensaver Simulator Tune seeded Matrix-style code rain, balance motion and contrast, then compare measured frame delivery with the selected FPS target.
Cardio Training Maximal Oxygen Uptake (VO2 Max) Calculator Estimate VO2 max from four field-test methods and compare aerobic capacity with adult age-sex reference bands, METs, and oxygen use.
Date Time Meditation Timer Plan a fixed or open-ended meditation sit with a prep countdown, interval chimes, visual cues, and a browser-based live timer.
Productivity Meeting Agenda Generator Build a timeboxed meeting agenda from outcomes and owned topic rows, with exact overrun minutes and practical facilitation checks.
Finance Meeting Cost Calculator Estimate the labor cost of one meeting and its yearly recurrence, then compare a shorter or smaller scenario using loaded hourly rates.
Productivity Meeting Minutes Generator Turn rough meeting notes into structured Markdown minutes with decisions, accountable action items, and circulation-readiness checks.
Education Memory Allocation Algorithm Simulator Compare contiguous memory fit policies through stepwise placements, coalescing and failure reasons alongside external fragmentation metrics.
HTTP Meta Tag Generator Build search and social meta tags from page facts with canonical and robots checks, preview-image warnings, and escaped copy-ready HTML.
Exam Prep Microsoft Azure Administrator Exam Prep Practise AZ-104 with 30 original Azure administration questions, documented explanations and repeatable rounds to focus your study.
Exam Prep Microsoft Azure Data Fundamentals Exam Prep Practise DP-900 data concepts with 36 original questions, source-linked explanations and focused rounds across Azure data and analytics domains.
Exam Prep Microsoft Azure Fundamentals Exam Prep Practise AZ-900 with 36 original questions and sourced explanations that help you review mistakes across the three exam domains.
Exam Prep Microsoft Azure Network Engineer Exam Prep Practise AZ-700 networking with 35 unofficial scenarios, source-linked explanations and focused reviews of missed answers by skill area.
Exam Prep Microsoft Azure Solutions Architect Exam Prep Practise AZ-305 architecture decisions with 32 original scenarios and source-linked explanations, then review missed answers by domain.
Exam Prep Microsoft DevOps Engineer Exam Prep Practise AZ-400 with 40 original DevOps scenarios, documentation-linked explanations and focused retries to review missed answers by domain.
Exam Prep Microsoft Power BI Data Analyst Exam Prep Practise PL-300 Power BI skills with 32 original questions, source-linked explanations and focused retries across four data analyst domains.
Exam Prep Microsoft Power Platform Fundamentals Exam Prep Practise PL-900 Power Platform concepts with original questions, answer explanations and focused or weighted rounds to guide your next study session.
Exam Prep Microsoft Security, Compliance, and Identity Fundamentals Exam Prep Review July 2026 SC-900 concepts with original practice questions, source-linked explanations and focused retries of missed answers.
Electrical Microstrip Impedance Calculator Estimate PCB microstrip impedance or solve finished trace width from stackup geometry, compare IPC-2141 and Hammerstad-Jensen, and test tolerance.
Cooking Microwave Cooking Time Converter Estimate microwave cooking time for a different wattage and power level, with early-check reminders and standing time kept separate.
Body Metrics Mid-Parental Target Height Calculator Estimate a child's family target height from biological parent heights, compare three methods, and read the midpoint within a chosen band.
Productivity Mind Map Builder Turn an indented outline into a browser-local mind map with balanced or directional layouts, branch counts, and a reusable hierarchy.
Psychology Mini-IPIP Big Five Assessment Explore a 20-item Mini-IPIP Big Five profile with reverse-keyed trait means, response consistency cues, and clear non-normative limits.
Education Minimum Spanning Tree Algorithm Simulator Compare Kruskal and Prim on weighted graphs with deterministic edge decisions, cycle rejections, and minimum spanning forest results.
Education Missing Number Sheet Generator Create customizable missing-number worksheets for counting practice with forward, backward, or skip-counting patterns plus seeded versions and answer keys.
Automotive Mobile Detailing Quote Calculator Build a mobile detailing quote from service scope and job costs with travel pricing, margin safeguards and an inspection-aware range.
Education Molarity Calculator Solve molarity and related quantities from the values you know with unit conversion, purity adjustment and formula-based atomic weights.
Education Mole Gram Particle Converter Convert grams, moles, or representative entities into matching chemistry values with molar-mass math and exact or classroom constants.
Finance Monthly Budget Calculator Plan a monthly budget from take-home income, compare needs, wants and goals with three guides and check your cushion and emergency runway.
Finance Monthly Retainer Capacity Calculator Test whether a monthly retainer fits delivery capacity and margin targets after response reserve, rollover exposure, and existing commitments.
Education Morse Code Decoder Decode written Morse locally into readable text, check unknown groups and separators, and hear practice audio with adjustable character and spacing speeds.
Education Morse Code Generator Encode text or TXT files as International Morse code with unsupported-character checks and Farnsworth timing, plus local playback and WAV output.
Quiz Morse Code Quiz Practice visual International Morse letters and digits in seeded rounds with immediate corrections, pattern totals, and missed-symbol replay.
Finance Mortgage Calculator Estimate a fixed-rate mortgage payment, cash to close and full payoff schedule with escrow, PMI and extra-principal interest savings.
Finance Mortgage Refinance Break-Even Calculator Compare a current mortgage with a fixed-rate refinance to find the cash-flow break-even month and check the balance-adjusted result.
Diagnostics Motorcycle Tire Pressure Calculator Plan cold motorcycle tire pressures from a manual or profile baseline while accounting for ride load and temperature change within clear safety limits.
Moving Moving Box Calculator Estimate moving boxes and packing supplies from your rooms, subtract reusable stock, and budget purchases using your own prices.
Moving Moving Labor Hours Calculator Estimate moving labor hours and booking time using move size, crew and access conditions plus the mover’s minimum-hour rules before reserving.
Gardening Mulch Coverage Calculator Calculate mulch volume and bag count from bed area and top-up depth, then compare bagged and bulk orders with supplier rounding.
Education Multiple Choice Sheet Generator Build print-ready multiple-choice worksheets from delimited rows or Aiken blocks with reproducible versions, answer keys, and item-quality checks.
Database MySQL Slow Query Log Analyzer Analyze MySQL slow query logs locally to group SQL fingerprints and rank accumulated or tail cost with scan, lock and temp-table findings.
Productivity NAICS Code Lookup Find a 2022 NAICS code from an activity phrase or known code, compare ranked candidates and hierarchy paths, then verify the official definition.
Productivity NASA Task Load Index (NASA-TLX) Rate six workload dimensions after a task and calculate the official pairwise-weighted NASA-TLX score alongside the unweighted Raw TLX mean.
Networking NAT Pool Capacity Calculator Size a NAT or SNAT public address pool from client sessions, planning reserve and hot-destination demand with headroom and failure checks.
Photography ND Filter Exposure Calculator Calculate the external ND stops needed for a metered scene, then compare fixed, stacked or variable filters for stills and video settings.
HTTP NGINX Proxy Headers Checker Audit an NGINX proxy block for unsafe forwarded headers and trust-boundary gaps with checks for WebSocket, timeout and upstream TLS risks.
Psychometrics NIMH Adult Brief Suicide Safety Assessment Document the clinician-led NIMH Adult BSSA after a positive ASQ screen, with immediate safety rules and setting-aware disposition guidance.
Psychometrics NIMH Youth Brief Suicide Safety Assessment Document the clinician-led NIMH Youth BSSA after a positive ASQ screen, including guardian safeguards and setting-aware disposition guidance.
Productivity NIST Are We Making Progress? (40 Statements) Compare workforce or leader responses across seven Baldrige categories using transparent 1–5 means for the Revised 2011 NIST questionnaire.
Finance NIST Sustainable Manufacturing Cost Assessment (CATS) Reproduce NIST CATS Example 10 and see how investment budget and environmental expenditure limits change the preferred manufacturing option.
Date Time NTP Config Generator Generate NTP configuration for Linux daemons or Cisco devices with source compatibility checks and warnings for unsafe fallback settings.
Date Time NTP Offset Log Checker Review NTP or chrony peer evidence for clock offset and uncertainty with configurable gates for stratum, reach, and source selection.
Education Name Tracing Sheet Generator Create printable name tracing sheets from a roster with adjustable practice support and handwriting guides plus layout and privacy checks.
Diagnostics Nameserver Health Check Check a domain’s resolver-visible nameserver set and verify address coverage, SOA presence, and cross-resolver drift before a DNS cutover.
Childcare Nanny Payroll Taxes Calculator Estimate 2026 nanny payroll taxes and household employer cost from cash wages with FICA, FUTA, state unemployment and withholding.
Childcare Nanny Share Cost Calculator Estimate each family’s nanny-share cost across weekly to annual budgets using shared care, solo time, overtime and host-credit terms.
Networking NetFlow Top Talkers Analyzer Rank NetFlow or IPFIX rows to find dominant endpoints and services while comparing byte, packet and flow patterns with local processing.
Devtools Netcat Command Generator Build shell-quoted Netcat or Ncat commands for authorized socket tasks with variant compatibility checks and warnings for risky options.
Sysadmin Netplan Config Generator Build Netplan YAML for Ubuntu static interfaces with CIDR addresses, DNS, routes, and warnings for gateway or priority mistakes.
Networking Network Audit Findings Report Turn network audit findings into a ranked remediation register with escalation counts, due-state checks, owner gaps, and browser-local reporting.
Networking Network Change Plan Report Build a network change plan with readiness gates and ordered cutover steps, then review rollback evidence and residual-risk guidance.
Networking Network Diagram Designer Build a logical or physical network diagram from device and link records, flag missing or isolated endpoints, and prepare a reviewed handoff.
Education Network Flow Algorithm Simulator Simulate Edmonds-Karp or Dinic on an editable capacity network and verify the maximum flow with residual traces and a minimum-cut certificate.
Networking Network Throughput Calculator Estimate useful network throughput and transfer time from link capacity and RTT with TCP window, loss and packet-rate bottleneck checks.
Devops Nginx Server Block Generator Generate an NGINX server block for static sites, PHP-FPM apps, or reverse proxies with TLS routing plus safety and activation checks.
Wireless Noise Figure Cascade Calculator Calculate cascaded RF noise figure and receiver sensitivity from ordered gain and loss stages plus bandwidth, temperature and SNR.
Education Number Tracing Sheet Generator Create printable number tracing worksheets with guided-to-independent practice, readable quantity cues, and repeatable shuffled versions.
Quiz Nutrition Facts Label Quiz Practice reading U.S. Nutrition Facts labels with 24 original questions and explanations for serving-size calculations and nutrient comparisons.
Security OAuth Redirect URI Policy Checker Compare OAuth redirect URI registrations with observed requests to find exact-match drift, unsafe schemes and wildcard or nested-redirect risk.
File Tools OCR PDF Tool Extract text from native or scanned PDFs in your browser, with per-page OCR fallback, confidence clues, range guards, and local file handling.
Networking OSPF Interface Cost Calculator Calculate OSPF interface cost from reference and link bandwidth, compare a manual override, and reveal fast links that collapse to cost 1.
Quiz OTC Medicine Label Quiz Practise reading U.S. Drug Facts labels with fictional medicine excerpts and answer explanations, then revisit the questions you missed.
Quiz OWASP Top 10 Quiz Practise OWASP Top 10:2025 risk categories and mitigations with original scenarios, explained answers and focused retries of missed questions.
Cloud Object Storage Cost Calculator Estimate monthly object storage cost from capacity and request volume with retrieval, egress, lifecycle and editable provider rate assumptions.
Devops Observability Event Volume Calculator Estimate observability storage from event volume and retention with compression, replica copies and reserve plus optional quota headroom.
Diagnostics Observability Ingest Cost Calculator Estimate monthly observability ingest cost from measured telemetry and model collector reduction across vendor meters with retention discounts and growth.
Small Business Office Cleaning Bid Calculator Build or audit a recurring office cleaning bid using workload and labor costs with overhead, minimum-visit protection and target margin.
Devops On-call Handover Report Prepare an on-call handover with normalized incident rows, ownership checks, readiness rules, and warnings for risky or incomplete transfers.
Strength Training One Rep Max (1RM) Calculator Estimate one-rep max from a completed set, compare seven named formulas, and build rounded training loads with clear confidence cues.
Game Online 2048 Game Merge matching tiles toward 2048 with repeatable seeded boards and one-move undo to practice a different route from the same opening.
Game Online Block Puzzle Game Play an untimed block puzzle, preview placements and line clears, and replay the same piece sequence to try for a higher score.
Game Online Bomberman Game Play a seeded Bomberman-style maze, clear enemies with timed blast lanes, and replay the same arena across three difficulty and scoring modes.
Game Online Breakout Game Play a seeded Breakout-style run with adjustable speed and paddle settings, then compare brick progress with streak scoring and browser bests.
Game Online Bubble Shooter Game Clear seeded bubble fields by matching colors and dropping unsupported clusters, with symbol-coded bubbles and a reflected guide for bank shots.
Game Online Checkers Game Play American checkers against a casual computer or a friend on the same device, with forced-jump guidance and repeatable computer replies.
Game Online Chess Game Play untimed chess against a friend on one device or a seeded computer, with legal-move guidance and focused practice positions.
Date Time Online Clock Compare one instant across local, UTC, and IANA time zones, check handoff work windows, and prepare calendar-ready UTC event text.
Game Online Digger Game Play a seeded Digger-style tunnel chase, collect 16 emeralds, and compare routes across difficulty and scoring modes with exact replay.
Game Online Dots and Boxes Game Play Dots and Boxes against a seeded computer or a friend on the same screen, with capture previews to help plan and compare your moves.
Game Online Drift Racing Game Race clockwise through checkpoints and build drift chains on seeded circuits, then replay the same course to improve your time and score.
Game Online Endless Runner Game Dodge obstacles and build diamond streaks in a three-lane endless runner, replaying seeded routes to improve your distance and score.
File Tools Online File Compressor Compress one local file into a compatible archive or stream and review size change with split delivery plus SHA-256 integrity before downloading.
Game Online Klondike Solitaire Game Play Klondike solitaire with highlighted legal destinations and repeatable deals that let you try a different approach with the same cards.
Game Online Mahjong Solitaire Game Clear Mahjong Solitaire boards by matching exposed tiles, with solvable seeded deals and keyboard controls for selecting each pair.
Game Online Maze Game Solve seeded mazes with optional breadcrumb trails and replay the same layout to reduce extra steps and improve your local best.
Game Online Memory Match Game Match hidden card pairs with symbols and word labels, then replay the same layout to practise remembering positions in fewer turns.
Game Online Minesweeper Game Play untimed Minesweeper with a safe first reveal and seeded boards you can replay by keeping the same settings and opening cell.
Game Online Pacman Game Play a seeded Pac-Man-style maze with three modes and difficulty levels, then measure pellet progress through power chains and active time.
Game Online Paddle Ball Game Play paddle ball against the computer or a friend on one device, with adjustable pace and repeatable seeded serves for rally practice.
Game Online Penalty Kicks Game Play penalty shootouts as shooter and goalkeeper with repeatable seeds and computer choices locked before you pick a shot or dive.
Game Online Reversi Game Play Reversi with a friend on one device or practise against a seeded computer, checking every captured line before placing a disc.
Game Online Rock Paper Scissors Game Challenge a friend on the same device or play Rock Paper Scissors against the computer, with best-of scoring and repeatable computer throws.
Game Online Snake Game Play a seeded Snake route, choose wrap-through or solid walls, and replay the same food pattern to improve your score and path planning.
Game Online Space Invaders Game Play a seeded Space Invaders-style defense across three challenge levels and compare score, accuracy and threat with locally saved bests.
Game Online Sudoku Game Play classic Sudoku puzzles at your own pace with pencil marks and optional cell reveals, then reuse a seed to play the same grid again.
Game Online Table Tennis Game Play table tennis against a computer opponent, time each return after one bounce and replay the same seed with win-by-two scoring.
Game Online Tetris Game Play a seeded Tetris-style stacking run, tune entry speed and assists, and replay the same seven-piece order to improve lines and score.
Game Online Tic Tac Toe Game Play tic tac toe against a second player or seeded computer, practise set openings, and use minimax hints to compare every legal move.
Game Online Word Guess Game Solve a hidden word in six guesses with repeated-letter clues and optional strict hard mode, then replay seeded puzzles for practice.
Electrical Op-Amp Gain Calculator Calculate closed-loop op-amp gain or solve a resistor value and check output swing against speed limits and resistor tolerance under the entered load.
HTTP Open Graph Tag Generator Generate Open Graph and X card tags for a public page with useful image hints, article fields, and crawler-focused review warnings.
HTTP Open Graph Tag Previewer Preview social share cards from pasted HTML or a public URL and check metadata fallbacks, image fit and canonical identity with advisory scores.
HTTP OpenAPI Operation Coverage Checker Compare OpenAPI operations with test evidence to measure scoped coverage and find missing routes, unmatched rows or duplicate operation IDs.
Devops OpenTelemetry Collector Config Generator Generate OpenTelemetry Collector YAML for OTLP pipelines with memory and batch controls, endpoint checks, and rollout warnings.
Security OpenVPN Client Config Generator Generate an OpenVPN client profile with matched routing, TLS, cipher, and credential choices plus import and security review warnings.
Psychometrics Oregon Avocational Interest Scales (ORAIS) Complete the public-domain ORAIS survey and compare 33 activity-frequency scales with common-range means and answer-level review.
Education Oregon Vocational Interest Scales (ORVIS-92) Rate 92 work activities to compare eight ORVIS vocational-interest domains, with transparent scoring and no ability or career-fit claim.
Cooking Oven to Air Fryer Converter Convert conventional or fan-oven directions into air-fryer starting temperatures and times with a separate early-check reminder.
Finance Overtime Pay Calculator Estimate gross overtime pay from entered hours and hourly rate using daily or weekly thresholds with premium tiers, rounding rules, and allowances.
Pregnancy Ovulation Calculator Estimate likely ovulation and fertile-window dates from cycle timing, with recent-cycle variability cues and clear calendar limits.
Education P-Value Calculator Calculate a p-value from normal, Student's t, chi-square or F statistics using the declared tail and degrees of freedom with clear interpretation limits.
File Tools PDF Compressor Compress a PDF locally in your browser, compare structural and production estimates, and catch encryption or image-quality risks before download.
File Tools PDF Document Comparator Compare two text-bearing PDFs locally with content-aware page alignment and review page-level changes, movement, and text-extraction gaps.
File Tools PDF Merger Merge PDF files locally in your browser, arrange their page order, enforce file and size guards, and download one combined document.
File Tools PDF Metadata Editor Edit PDF Document Info fields locally for cataloguing or privacy cleanup and verify page content plus XMP preservation before downloading.
File Tools PDF Page Cropper Crop selected PDF pages by exact margins in your browser, preserve hidden page content, and verify every rewritten CropBox before download.
File Tools PDF Page Deleter Delete selected PDF pages in your browser, verify source-to-output renumbering, and catch range or document-integrity warnings before download.
File Tools PDF Page Extractor Extract selected PDF pages in your browser, keep a custom order or remove repeats, and verify every output page against its source.
File Tools PDF Page Manager Reorder or extract PDF pages and rotate or split them locally in your browser with typed ranges, page-flow checks, and a source-to-output manifest.
File Tools PDF Page Marking Planner Add page numbers and watermarks to selected PDF pages in your browser, then verify sequence and placement plus coverage before download.
File Tools PDF Page Numberer Add page numbers to selected PDF pages locally with custom sequences and mirrored facing-page placement, then download the stamped copy.
File Tools PDF Page Reorderer Reorder PDF pages locally with ranges and presets, then verify duplicate or omitted pages through an exact output-to-source manifest.
File Tools PDF Password Workflow Planner Plan open and owner passwords for a PDF, check effective search space, and produce a redacted handoff without uploading or encrypting the file.
File Tools PDF Protector Protect a PDF locally with AES encryption, separate open and owner passwords, permission choices, and password checks before download.
File Tools PDF Redactor Plan PDF redactions locally, inspect selectable text and hidden-data risks, and prepare a handoff for true removal and final-file verification.
File Tools PDF Repair Tool Inspect and repair a damaged PDF in your browser, compare structural warnings, and create a normalized copy when its page tree can be read.
File Tools PDF Rotator Rotate selected PDF pages locally, combine new turns with saved angles, and download a corrected copy without uploading the document.
File Tools PDF Signer Add a typed, drawn or image signature mark to one PDF in your browser, verify placement and download a visual-only signed copy.
File Tools PDF Splitter Split one PDF locally into custom ranges, single-page files or fixed-size packets, then verify overlaps before downloading a ZIP.
File Tools PDF Unlocker Unlock an authorized PDF locally with a known password, verify the rewritten copy, and keep document bytes and credentials in your browser.
File Tools PDF Watermarker Add a text watermark to selected PDF pages in your browser, control single or tiled placement and visual weight, then download the marked copy.
File Tools PDF to File Converter Convert a PDF locally into editable text or page-faithful images with page-range checks, document handoffs and no source-file upload.
Data Format PEM Bundle Extractor Split a PEM bundle into complete certificates, requests, and keys while preserving line spans and adding SHA-256 evidence through local file handling.
Devtools PHP Formatter Format PHP locally for a chosen language version and style profile, with mixed-template handling and bounded compatibility checks.
Devtools PHP Serialized Data Decoder Decode PHP serialized data into a local typed tree with byte offsets, reference checks, and binary-safe display without object instantiation.
File Tools PPTX Compressor Compress a PPTX locally by shrinking eligible JPEG and PNG images, then verify package integrity and keep unrelated presentation parts unchanged.
Productivity PTO Accrual Calculator Project a PTO balance across accrual periods with used and planned leave, then model caps and carryover checkpoints in a period ledger.
Psychometrics PTSD Checklist for DSM-5 (PCL-5) Complete the 20-item PCL-5 for a past-month symptom profile with total and cluster scores, screening context and qualified-review cautions.
Sysadmin PXE Boot Menu Generator Build matched PXELINUX, iPXE and GRUB boot menus from one entry list with default and fallback checks for safer network-boot handoffs.
Running Pace & Speed Converter Convert running pace and speed between metric and imperial units, with constant-speed times for common distances and optional custom splits.
Running Pace Band Generator Build a race pace band with cumulative checkpoints and adjustable pacing, including stop-time planning and display-only rounding controls.
Shipping Package Shipping Cost Calculator Compare modeled parcel costs from packed weight and dimensions using billable weight, carrier-style surcharges, account discounts and customer margin.
Networking Packet Capture Size Calculator Estimate packet capture storage from traffic rate and duration with snapshot limits, file overhead, compression and capacity reserve checks.
Education Page Replacement Algorithm Simulator Compare four page-replacement policies with step-by-step frame traces and see how fault counts, hit ratios and frame capacity change.
Home Improvement Paint Calculator Estimate wall and ceiling paint from measured area and openings using coat count, product coverage, waste allowance and whole-container rounding.
Trades Painting Quote Calculator Price a painting job from measured area and job assumptions with paint and labor costs plus overhead, margin and a minimum quote.
Shipping Pallet Load Plan Calculator Plan identical-carton pallet loads against footprint, height and gross-weight limits while checking TI-HI capacity, partial pallets and handling warnings.
Education Parent Daily Report Generator Turn daily child care notes into a family-ready report with timed routines, learning highlights, reminders, and completeness warnings.
Events Party Food Calculator Plan party food and non-alcoholic drinks for adults and children with editable portions, cooking yield and whole-package shopping quantities.
Events Party Ice Calculator Estimate party ice for drinks and coolers with editable allowances and whole-bag purchase options that include your chosen reserve.
Travel Passport Photo Preparer Crop a local portrait to current U.S. or UK paper-passport dimensions, check manual head size, and prepare a 300 ppi JPEG or print sheet.
Travel Passport Photo Size Lookup Find passport, visa, or ID photo dimensions and check head-size fit before estimating print pixels or sheet capacity for the final crop.
Security Password Strength Calculator Check a password against predictable patterns and attack scenarios, compare estimated crack times, and keep the candidate in your browser.
Quiz Password and MFA Security Quiz Practise password and MFA security with 30 original account scenarios, answer explanations and targeted retries for the questions you miss.
Cooking Pasta Servings Calculator Calculate dry pasta to cook and whole packages to buy, with adjustable adult and child portions and cooked-volume estimates by shape.
Devops Patch Window Duration Calculator Estimate a sequential patch window from fleet size and concurrency, then test phase timing and reserves against fit, slack and rollback needs.
Education Pathfinding Algorithm Simulator Compare four pathfinding algorithms on an editable weighted grid and inspect route cost, exploration order, diagonal rules and no-path outcomes.
Psychometrics Patient Health Questionnaire (PHQ-15) Assessment Rate how much 15 physical symptoms bothered you over four weeks, then review the 0–30 PHQ-15 total and its symptom-burden band.
Psychology Patient Health Questionnaire (PHQ-9) Assessment Score the nine PHQ-9 symptoms, keep functional impact separate, and flag any Item 9 response for direct follow-up regardless of the total.
Education Pattern Practice Sheet Generator Create printable repeating-pattern worksheets with varied task types, matched answer keys, and reproducible seeded versions for class use.
Education Paver Calculator Estimate pavers for a rectangular, round or measured area and include joint spacing and waste before checking pack quantity, surplus and cost.
Finance Paycheck Calculator Estimate 2026 U.S. take-home pay for hourly or salaried work with federal income tax, FICA and deductions plus user-entered local withholding.
Finance Payment Processor Fee Calculator Calculate processor fees or gross up a charge for a target deposit using cent rounding, editable rate rules and current provider comparisons.
Finance Payroll Proration Calculator Calculate partial-period gross pay by calendar or workday policy, then compare fixed and custom denominators with final rounding.
Psychometrics Perceived Social Intelligence Scales for Robots Rate one robot with the 80-item PSI full form to review 20 perceived social-intelligence scales and three descriptive composite totals.
Education Percentage Calculator Solve five common percentage problems from part-of-whole to reverse change with clear formulas, denominator checks and precision controls.
Education Percentile Calculator Calculate sample percentiles, compare three rank methods, and inspect sorted values or tied reverse ranks before using a cutoff.
Energy Personal Carbon Budget Analyzer Estimate your annual carbon footprint against a chosen budget, compare major sources, and test local emission factors or verified offsets.
Quiz Personal Finance Basics Quiz Practice personal finance basics with 48 original US-focused questions and explanations, then retry missed answers to check your understanding.
Finance Personal Loan Calculator Compare a fixed-rate personal loan's monthly payment, fees, total borrowing cost, and payoff savings before you accept an offer.
Pets Pet Travel Crate Size Calculator Calculate minimum internal pet travel crate dimensions from body measurements, then compare clearance and flag limits that need carrier review.
Quiz Phishing Awareness Quiz Practice spotting phishing cues and choosing safer responses in 30 fictional scenarios, with answer explanations and focused retries for missed questions.
Education Phonics Worksheet Generator Create phonics worksheets from your word list with targeted activities and reproducible prompt order plus answer keys and sound-coverage checks.
Image Photo Print Resolution Calculator Check whether a photo has enough usable pixels for a chosen print size and framing choice, with crop reserve and practical PPI guidance.
Education Picture Word Matching Sheet Generator Create picture-word matching sheets from cue and word rows with reproducible shuffling plus cue checks, answer keys and print-ready pages.
Networking Ping Results Analyzer Analyze saved ping output for packet loss and unstable round-trip times, then compare sequence gaps and jitter with your own limits.
Baking Pizza Dough Ball Calculator Scale pizza dough balls by target mass and baker's percentages to get ingredient weights plus a proof plan with yeast and handling checks.
Networking PoE Budget Calculator Plan a PoE switch from endpoint demand and cable loss, then check reserve capacity against powered ports, startup surge and shedding priority.
Home Improvement Polymeric Sand Calculator Estimate polymeric sand bags from paver geometry and product yield, then test how joint width and installation conditions affect the plan.
Date Time Pomodoro Timer Plan focus rounds and short or long breaks, estimate a goal finish time, and run a browser-based Pomodoro countdown with quiet cues.
Pool & Spa Pool Filter Size Calculator Size a pool filter from turnover or known flow, then compare sand, cartridge and DE media area against pump, pipe and cleaning limits.
Pool & Spa Pool Volume Calculator Estimate pool water volume from shape and depth, then plan fill time and turnover flow with label-dose scaling and measurement sensitivity.
Security Port Exposure Summary Checker Turn firewall, scanner, or cloud-rule port rows into a local exposure review that prioritizes risky public listeners and missing ownership.
Networking Port List Checker Normalize mixed TCP and UDP port lists into compact ranges and target strings with IANA bands, duplicate checks and service exposure cues.
Home Improvement Post Hole Concrete Calculator Estimate concrete bags for round post holes after post displacement and gravel depth, with bag yield, waste allowance and optional cost.
Database PostgreSQL EXPLAIN Plan Analyzer Inspect PostgreSQL EXPLAIN plans for costly nodes and row-estimate drift with browser-local parsing of scan, spill and buffer clues.
Database Postgres Work Mem Calculator Size PostgreSQL work_mem from server RAM and active query demand with hash weighting, safety margins and scoped spill guidance.
Psychology Posttraumatic Stress Disorder Checklist (PCL-5) Assessment Complete the 20-item past-month PCL-5, see the 0 to 80 total and DSM-5 cluster counts, and review screening cut points with safety context.
Electrical Power Factor Calculator Calculate power factor from kW and kVA, size leading or lagging reactive correction, and estimate per-phase capacitance when voltage is known.
Breathwork Pranayama Sequence Planner Build a timed pranayama sequence from custom breath ratios and pace scaling with rests, safety warnings, and a live visual rehearsal.
Education Pre-Writing Strokes Sheet Generator Create printable pre-writing stroke sheets with adjustable practice support and direction cues plus page-density checks and repeatable versions.
Pregnancy Pregnancy Caffeine Limit Calculator Count caffeine from drinks, foods, and medicines during pregnancy and compare the day total with a 200 mg or clinician-set planning limit.
Pregnancy Pregnancy Due Date Calculator Estimate a pregnancy due date using LMP or conception records, IVF transfer details or ultrasound dating with gestational age and term dates.
Pregnancy Pregnancy Weight Gain Range Calculator Compare pregnancy weight gain with BMI-based ranges for one baby or twins, including a week-to-date planning band and clinical cautions.
Psychometrics Preliminary IPIP AB5C Facet Scales Map 486 IPIP responses into 45 preliminary AB5C facet means with exact keying and clear limits on norms, diagnosis, and selection.
Psychometrics Preliminary IPIP ADHD Syndrome Scale Complete the 12-item preliminary IPIP ADHD scale and review its continuous raw score with clear non-diagnostic limits and scoring details.
Psychometrics Preliminary IPIP Dissociation Scale Record 31 IPIP dissociation ratings and review one continuous raw score with exact scoring, answer context, and non-diagnostic limits.
Psychometrics Preliminary IPIP Hypomanic Traits Scales Review two separate preliminary IPIP hypomanic-trait scores from 24 ratings with exact keying, editable response links, and non-diagnostic limits.
Psychometrics Preliminary IPIP Physical Attractiveness Scale Complete the nine-item IPIP self-perceived physical attractiveness scale with reverse-keyed scoring and clear non-normative guidance.
Psychometrics Preliminary IPIP Sensation-Seeking Facets Compare Dangerous, Impulsive, and Calculated thrill-seeking with three separate IPIP raw scores and transparent reverse-keyed scoring.
Psychology Preliminary IPIP Seven-Factor Scales (70-Item) Explore seven preliminary IPIP trait totals from 70 responses with exact keying and clear limits on norms, types, and diagnosis.
Tools & Equipment Pressure Washer Nozzle Size Calculator Match pressure washer nozzle size to pump flow and working pressure, then compare stocked tips with component ratings and wear effects.
Small Business Pressure Washing Quote Calculator Estimate a pressure washing quote from measured scope, production costs, access, minimum charge, and a configurable gross-margin floor.
Psychology Primary Care PTSD Screen (PC-PTSD-5) Check a lifetime trauma gate and five past-month PTSD symptoms, then see how the 0–5 PC-PTSD-5 score compares with 3+ and 4+ cut points.
Education Process Synchronization Simulator Trace producer-consumer and dining synchronization with repeatable mutex and semaphore evidence for blocking, wakeups, progress and deadlock.
Finance Profit Margin Calculator Calculate profit margin and markup from revenue and direct cost, then test target pricing plus optional expenses and percentage fees.
Date Time Progressive Muscle Relaxation (PMR) Coach Build a paced progressive muscle relaxation routine that sequences body regions with tense-and-release timing, comfort reminders, and live cues.
Finance Project Budget Burn Calculator Forecast project budget burn from spend, commitments, dates, and progress, then compare runway and earned-value signals across four methods.
Small Business Project Quote Calculator Build a project quote from labor and expenses, choose margin or markup pricing and check cost recovery before sending fixed-fee terms.
Body Metrics Projected Adult Height Calculator Estimate a child's projected adult height from current stature and parent heights, with an uncertainty range and sensitivity comparisons.
Diagnostics Prometheus Cardinality Cost Calculator Estimate Prometheus monthly cost from active series and retention, then model cleanup savings and growth with editable managed or self-hosted rates.
Devops Prometheus Retention Storage Calculator Estimate Prometheus local storage from series or sample rate, then account for retention and compression plus WAL reserve and disk budget.
Devops Prometheus Scrape Config Generator Build Prometheus scrape YAML from target rows and labels with timing, grouping, limits and validation cues to review before a live reload.
Shell Prompt String 1 (PS1) Generator Build or import a Bash PS1 prompt with ordered tokens and safe ANSI styling plus a terminal preview and setup text for real-shell testing.
Tools & Equipment Propane Tank Runtime Calculator Estimate propane burn time from tank fuel and appliance BTU load, then check reserve-adjusted runtime, fuel cost and limited vapor flow.
Transport Propeller Slip Calculator Calculate apparent propeller slip by comparing measured and theoretical boat speed, with an optional range based on speed uncertainty.
Data Format Properties Converter Convert Java properties into structured or line-based configuration with decoded escapes, scalar handling, and clear duplicate-key checks.
Nutrition Protein Intake Calculator Plan daily protein grams from body size and training goals with practical meal targets, intake comparisons, and medical-context cautions.
Networking Proxy Server Checker Review pasted or current-request proxy headers, trace the trusted edge from the right, and flag spoofable client-IP evidence and disclosure clues.
Devtools Pull Request Cycle Time Calculator Measure pull request cycle time from CSV timestamps, compare median and slow-tail percentiles, and flag pickup delays or dirty rows.
DNS Punycode IDN Converter Convert Unicode hostnames and xn-- Punycode labels in your browser with DNS length checks, normalization choices and mixed-script warnings.
QR QR Batch Generator Generate named QR images from pasted rows or CSV/TXT files, then catch capacity and scan-readiness risks before downloading the batch.
QR QR Label Sheet Generator Create printable QR label sheets from CSV or text rows with stock presets and placement planning plus density warnings and local processing.
Mindfulness Qibla Finder Find the Qibla from city search, GPS, IP or manual coordinates with true or magnetic bearings and clear turn guidance for prayer setup.
Networking QoS Bandwidth Allocation Calculator Allocate a QoS parent rate across traffic classes and check reserved bandwidth, best-effort headroom, burst ceilings and priority pressure.
Finance Quarterly Estimated Tax Calculator Estimate 2026 U.S. federal tax, compare safe-harbor targets, and spread the remaining amount across active Form 1040-ES due dates.
Devops Queue Buffer Delay Calculator Calculate queueing delay from buffer depth and bottleneck rate, then compare occupancy and target buffer size with optional BDP context.
Devops Queue Worker Capacity Calculator Size a queue worker pool from busy-period arrivals, measured throughput, backlog drain time, utilization headroom, and worker limits.
Diagnostics Quick Response (QR) Code Decoder Decode a QR image locally, inspect the recovered payload, and flag suspicious links or sensitive OTP and Wi-Fi data before opening.
Devtools Quick Response (QR) Code Generator Create a QR code for links and common actions with payload-capacity and contrast checks plus quiet-zone, logo, and scan-readiness guidance.
Productivity RACI Matrix Generator Build a RACI matrix from activity rows and find missing owners or overloaded roles before the project handoff reaches the wider team.
Security RADIUS Client Config Generator Build FreeRADIUS client stanzas from NAS rows with device-specific secret checks, address-scope warnings, and hardened security settings.
Networking RADIUS Request Load Calculator Estimate RADIUS request load from access, accounting, retries, and bursts, then check per-server budgets and N-1 failover headroom.
Storage RAID Capacity and Sizing Calculator Calculate planned RAID capacity after spares, protection, overhead, and reserve, then check target fit, drive size, and bay count.
Storage RAID Performance Calculator Estimate RAID IOPS and throughput from drive benchmarks and workload mix, with write penalties, reserve, controller caps, and degraded scenarios.
Storage RAID Planning Suite Compare RAID capacity, workload headroom, rebuild exposure, recovery pressure, and three-year growth under one set of assumptions.
Storage RAID Reliability and MTTDL Calculator Estimate RAID MTTDL and fleet loss from AFR, rebuild exposure, spares, correlation, and URE pressure with comparable mitigation scenarios.
Storage RAID Sizing Calculator Plan RAID and RAID-Z capacity from drive geometry, parity, hot spares, fill headroom, metadata reserve, and physical chassis limits.
Psychometrics RAND SF-36 Health Survey (SF-36) Map 36 health responses to eight RAND 0–100 domain scores, keeping the one-year health-change item separate from the current-health profile.
Devtools README Generator Draft a repository README from project facts, then check setup and usage instructions plus licensing and contribution guidance before publishing.
Finance ROI Calculator Calculate total and annualized ROI from cost and recovered value, then compare optional payback and a benchmark without hiding negative returns.
Devops RPO/RTO Gap Calculator Compare RPO and RTO targets with measured recovery evidence, flag data-loss and restore-time gaps, and estimate added change or downtime exposure.
Cryptography RSA Keys Converter Rewrap an existing RSA key for PKCS#1, PKCS#8 or SPKI consumers with optional encrypted output and local public-identity checks.
Data Format RSS & Atom Feed Validator Validate RSS 2.0 or Atom 1.0 XML locally with format detection and line-aware errors plus empty-feed warnings and clear repair guidance.
Finance RSU and Stock Option Tax Calculator Estimate U.S. tax for RSU vests and NSO or ISO events, including withholding gaps, payroll tax, AMT exposure, and sell-to-cover needs.
Running Race Finish Time Calculator Estimate race finish time from distance and pace or speed, then compare splits, planned stops, pacing profiles, and cutoff margin.
Running Race Finish Time Predictor Predict a race finish from a recent result using the Riegel formula, then compare condition scenarios with target paces and even splits.
Running Race Pace and Finish Time Suite Build race pace and finish-time plans from a goal, recent result, or training block with stop-aware splits and scenario comparisons.
Running Race Timer Suite Track live race laps or review pasted splits with pace-by-segment comparisons and finish-time checks across kilometre, mile or 100 m views.
Sysadmin Rack Power Density Calculator Plan rack power density from device loads and feed limits, with failover headroom, heat output, occupancy, and watts-per-U guidance.
Automation Random Number Generator Generate random integers or decimals from a stepped range with secure or seeded draws, weighted profiles, exclusions, and repeat controls.
Education Random Picker Pick random names or rows with reproducible seeds and optional weights, then review group limits and estimated inclusion chances before sharing the draw.
Home Systems Range Hood CFM Calculator Estimate a range hood airflow target from cooking load and capture geometry, then screen a real hood for duct and makeup-air concerns.
HTTP Rate Limit Backoff Schedule Calculator Plan API retry waits with capped backoff, Retry-After floors, jitter envelopes, caller-budget checks, and shared-client pacing.
Strength Training Rate of Perceived Exertion (RPE) Calculator Convert Borg, CR10 or lifting RPE into relative effort with scale equivalents, sRPE load bands and optional heart-rate estimates.
Text Readability Checker Check English readability in your browser with five grade estimates and reading-ease bands plus audience fit and sentence-level revision cues.
Education Reading Fluency WCPM Calculator Calculate words correct per minute from a timed oral-reading probe, then compare accuracy and grade-season benchmark context.
Education Reading Level Checker Check an English passage across five grade formulas, compare its target grade band, and find sentences or words worth revising.
Home Improvement Rebar Calculator Estimate a rectangular slab rebar grid from cover and spacing, then calculate cut length, full stock bars, steel weight, and optional cost.
Cooking Recipe Food Cost Calculator Calculate recipe cost per serving from pack prices and usable yields, then compare a current selling price with your food-cost target.
Cooking Recipe Scaling Calculator Scale a recipe to a new yield and compare unrounded ingredient amounts with practical measuring fractions, keeping recipe-specific cautions in view.
Cooking Recipe Weight and Volume Converter Scale recipe ingredients and convert weight or kitchen volume with exact unit factors, sourced density assumptions, and controlled rounding.
Productivity Recruiting Pipeline Metrics Calculator Calculate recruiting funnel conversion and hire yield from stage counts, with offer-response coverage and data-quality checks.
Education Recursion & Backtracking Simulator Trace four recursion and backtracking presets step by step with synchronized call stacks, branch choices and clear return and undo events.
Database Redis Memory Size Calculator Size Redis maxmemory, per-process host RAM, and replica capacity from measured key costs, growth headroom, buffers, and shard plans.
Storage Redundant Array of Independent Disks (RAID) Calculator Calculate planned RAID capacity from drive sizes and layout, including spares, mixed-drive loss, operating reserves, and rebuild exposure.
Household Refrigerator Size Calculator Estimate refrigerator capacity for your household and storage habits, then compare measured kitchen space with model-specific allowances.
Devtools Regex Sample Matches Checker Test a JavaScript regex against lines that should match or fail with whole-line checks plus match evidence, input caps and backtracking guards.
Devtools Regex Tester Test JavaScript regular expressions against text or files with match and capture-group evidence, replacement previews, and timeout-protected runs.
Devops Release Cutover Window Calculator Budget a release cutover against its maintenance window, preserving rollback time while safely testing contingency and gate margin.
Productivity Release Notes Generator Turn commits, pull requests, or release bullets into audience-ready Markdown with grouped changes, parser warnings, and publication checks.
Finance Rent Split Calculator Split rent, utilities, and deposits across roommates with premium-room weights, exact cent reconciliation, and optional rounded collection.
Finance Rental Property Cash Flow Calculator Estimate rental property cash flow after vacancy, operating costs, reserves, and financing, with return targets and downside tests.
Storage Replication Backlog Time Calculator Estimate replication backlog catch-up time from sustained write rate, outage volume, usable throughput, apply limits and recovery targets.
Electrical Resistor Color Code Decoder Decode resistor colors for 4- to 6-band parts and get resistance, tolerance limits, reading direction plus first-order temperature drift.
Electrical Resistor Combination Finder Find practical resistor networks for a target value, rank nominal error, and screen stock tolerance and per-part power stress before building.
Diagnostics Resolver Policy Difference Comparator Compare public DNS answers across open and filtered profiles to separate policy splits from cache or DNSSEC drift with repeatable evidence.
Education Resonant Frequency Calculator Calculate LC resonant frequency from inductance and capacitance, then check tolerance limits, loaded Q, bandwidth, and reactance.
Small Business Restaurant Break-Even Covers Calculator Calculate restaurant break-even covers and profit targets by day or service, then compare expected sales with costs and your margin of safety.
Small Business Restaurant Labor Cost Calculator Calculate restaurant labor cost and its share of net sales from payroll totals or role groups, with employer costs and target comparisons.
Gardening Retaining Wall Block Calculator Estimate retaining wall blocks and hidden base or drainage materials from project dimensions with product sizing, waste allowances and pricing.
Finance Retirement Tax Savings Calculator Model a 2026 retirement contribution against IRS limits, tax treatment, federal savings, Saver's Credit, employer match, and growth.
Diagnostics Reverse DNS (PTR) Checker Check PTR records for an IP or hostname, verify forward-confirmed reverse DNS, and compare expected names or public resolver views.
DNS Reverse DNS Zone Generator Generate an IPv4 reverse DNS zone with PTR records and SOA validation plus RFC 2317 classless delegation and parent-zone CNAME guidance.
Education Revision Schedule Planner Build a revision timetable around exam dates and weekly availability, with subject coverage plus spaced priorities and capacity warnings.
Cooking Rice Water Ratio Calculator Calculate water for dry rice using package-based ratios and cup conversions, with adjustable cooked yield and portion estimates.
Education Ring Size Converter Convert ring diameter or circumference into matched regional sizes with nearby-row deltas, sold-size increments, and practical fit guidance.
Productivity Risk Register Generator Build a risk register from pasted rows or CSV with inherent and residual scores, owner-gap priorities, treatment cues, and review dates.
Quiz Road Signs Quiz Practice 25 common US MUTCD regulatory and warning signs with repeatable rounds, immediate feedback, and focused review of misses.
Devops Robots.txt Generator Generate a robots.txt policy with crawler-specific path rules and sitemap declarations plus import checks and warnings before publication.
Home Improvement Roof Sheathing Sheets Calculator Estimate whole roof sheathing sheets from footprint or measured deck area, with pitch, waste, panel size, H-clip, surplus, and cost checks.
Home Improvement Roofing Calculator Calculate roof surface area and whole shingle bundles from footprint or measured area with pitch, waste, product coverage and accessory estimates.
Energy Rooftop Solar Fit Calculator Estimate how many solar panels fit one roof face after pitch, setbacks, keepouts, frame gaps, and orientation, then screen DC size and annual energy.
Psychology Rosenberg Self-Esteem Scale (RSES) Assessment Score the 10-item Rosenberg Self-Esteem Scale, verify reverse-keyed responses, and read the 0 to 30 total against non-diagnostic guide bands.
Education Rounding Calculator Round exact decimal text by places, significant figures, named values, or custom increments with explicit tie rules and error traces.
Networking Route Table Longest Match Checker Find the IPv4 or IPv6 route that wins for a destination using longest-prefix lookup, selectable tie-break rules, and CIDR cleanup warnings.
Education Rubric Generator Build an analytic, single-point, or holistic rubric with observable criteria, balanced point allocation, descriptor drafts, and design checks.
Running Run-Walk Interval Calculator Plan run-walk intervals from route distance and separate segment paces, including exact finish clipping plus marker-stop and cue-load checks.
Running Running Age Grade Calculator Calculate your running age grade with the 2025 road tables and find the finish time and average pace needed for a chosen percentage.
Education Running Record Accuracy Calculator Score running-record accuracy, error and self-correction ratios, reading pace, and classroom bands while keeping comprehension in view.
Running Running Training Pace Calculator Turn a recent race result into estimated training paces, with repetition split times and equivalent race performances for comparison.
Aviation Runway Crosswind Component Calculator Calculate runway wind components and gust margins with true-to-magnetic conversion, runway comparisons, and profile-adjusted thresholds.
Security S3 Bucket Policy Public Access Checker Review an S3 bucket policy for public or cross-account grants, test trust boundaries, and prepare the live AWS checks needed before approval.
Storage S3 Lifecycle Policy Generator Build an Amazon S3 lifecycle policy with scoped transitions and expiration checks plus version cleanup and matching infrastructure output.
Security SAML Assertion Timing Checker Check SAML assertion timing from XML or encoded captures, apply clock-skew and expiry rules, and separate bearer from replay and session evidence.
Security SAML Metadata Validator Review SAML metadata XML for import blockers across roles and endpoints with local checks for certificate dates, refresh validity and signature presence.
Security SARIF Security Findings Analyzer Analyze SARIF logs into a local release gate with prioritized findings plus hotspot and tracking-coverage checks for security review.
Security SBOM Component Risk Analyzer Review SBOM components with a transparent risk score and separate queues for vulnerabilities, licenses, and incomplete package identity.
Devtools SCSS to CSS Compiler Compile a self-contained stylesheet locally as SCSS, indented Sass, or CSS and review output with LibSass compatibility warnings.
Devops SLA Availability Calculator Calculate SLA availability and downtime allowance with planned-maintenance policy, then check budget use, burn rate and breach projection.
Devops SLO Burn Rate Alerts Generator Generate multi-window Prometheus SLO burn-rate alerts with budget math and routing labels, then review thresholds before loading the YAML.
DNS SMIMEA / OPENPGPKEY Lookup Look up SMIMEA or OPENPGPKEY records for a mailbox and derive its RFC owner name with DNSSEC and resolver evidence plus cache and payload details.
Networking SNMP Polling Load Calculator Estimate SNMP polling pressure from devices and OIDs with interval and packing effects plus security, MTU and per-poller capacity checks.
DNS SPF Record Generator Build an SPF TXT record from real sender paths with ordered mechanisms and lookup-budget planning plus DNS packaging and rollout checks.
Diagnostics SPF Validation Report Check a domain's SPF record, trace include and redirect dependencies, and flag duplicate policies or lookup-budget risks from public DNS.
Database SQL Formatter Format SQL in your browser with dialect-aware layout and an audit that flags fallback output, unbalanced parentheses, and risky reuse.
Database SQL Fundamentals Quiz Practise SQL fundamentals with original query questions and explanations, then retry missed answers across portable SQL and PostgreSQL 18.
Database SQL INSERT Generator Turn pasted rows or a local delimited file into reviewable SQL INSERT statements with dialect-aware identifiers, literal handling, and row checks.
Database SQL Schema Designer Design and validate a relational schema locally before generating reviewed DDL for PostgreSQL, MySQL, or SQLite from one portable model.
Database SQL Validator Check SQL structure and selected dialect rules for PostgreSQL, MySQL, or SQLite without connecting to a database or executing statements.
Database SQL to Java Entity Generator Turn one MySQL or PostgreSQL CREATE TABLE statement into a reviewable Java persistence entity with explicit mapping choices and notes.
Database SQLite Manager Open a SQLite file in your browser and inspect schema or rows before running guarded SQL and saving deliberate edits as a new local copy.
Diagnostics SRV / NAPTR Service Discovery Check Trace SIP/SIPS, XMPP, or LDAP discovery through NAPTR and SRV to terminal addresses with optional public resolver comparison.
Storage SSD Endurance (DWPD/TBW) Calculator Calculate SSD endurance from DWPD or TBW, size the rating for per-drive host writes, and forecast SMART-based wear and replacement timing.
SSH SSH Algorithm Policy Checker Check SSH algorithms from configs or scans against a chosen policy and review blockers, exceptions and a safer configuration baseline.
SSH SSH Config Snippet Generator Build OpenSSH Host blocks from CSV inventory rows with inherited defaults and warnings for risky keys, jump hosts or connection sharing.
Diagnostics SSL CA Matcher Match a TLS leaf certificate to a candidate issuer with signature verification, CA checks, expiry horizons, and policy-based review guidance.
Diagnostics SSL Certificate Chain Checker Check a live TLS host or pasted PEM chain for broken issuer links, hostname and expiry problems, then build a root-aware install bundle.
Diagnostics SSL Checker Check a public hostname across SSL Labs endpoints for weak protocols and trust gaps, then prioritize certificate renewal and TLS fixes.
Diagnostics SSL Expiry Checker Check a live TLS listener for certificate expiry and SAN coverage, then verify renewal timing plus the served serial number and fingerprints.
Diagnostics SSL Matcher (Certificate, CSR, and Key) Compare a TLS certificate with a CSR or RSA private key in your browser, using exact SHA-256 SPKI identity checks without uploading secrets.
Diagnostics SSL OCSP Checker Check a public TLS host or pasted certificate for OCSP status and responder timing with freshness warnings and independent-verification evidence.
Image SVG Optimizer Reduce SVG file size through conservative cleanup and reference checks with precision controls plus a local preview before downloading revised markup.
Image SVG Path Editor Edit SVG path commands and transforms in your browser, sanitize unsafe markup, and review command structure before copying or downloading.
Image SVG Placeholder Generator Create an SVG placeholder with exact pixel dimensions and readable labels, then copy accessible markup or CSS with contrast warnings for layout work.
Cardio Training SWOLF Analyzer Analyze swim splits and stroke counts into comparable SWOLF trends with lap drift, segment changes, and pace cues for one pool course.
Quiz Safe Food Storage Quiz Practise U.S. food-storage decisions with 32 original questions, source-linked explanations and focused review of missed answers.
Finance Salary Raise Budget Calculator Plan salary raises by employee row or pooled salary base, with fiscal-day proration, employer burden, budget fit, and scenario comparisons.
Finance Sales Tax Calculator Calculate sales tax from a pre-tax price, tax-included total, or receipt tax line with clear cent-rounding and taxable-base checks.
Electrical Sallen-Key Filter Calculator Analyze Sallen-Key low-pass, high-pass, or band-pass stages from real R/C values with f0, Q, GBW headroom, tolerances, and response checks.
Small Business Salon Booth Rent Calculator Compare salon booth rent with commission income and find the weekly clients needed to cover costs or reach a cash goal after reserves.
Small Business Salon Service Price Calculator Calculate salon service prices that cover owner pay and booked chair costs, with fee allowances and upward rounding to meet your profit margin.
HTTP SameSite Cookie Policy Checker Check Set-Cookie headers for SameSite delivery and find Secure or HttpOnly gaps, prefix mistakes, partitioned-cookie issues and flow breakage.
Diagnostics Satcom Status Tracker Check public satellite TLE age, orbit class, and optional SatNOGS status before choosing a record for pass planning or fleet review.
Diagnostics Satellite Pass Tracker Forecast observer-relative satellite passes from TLE data and compare rise times, elevation filters and sky direction in calendar-ready windows.
Finance Savings Goal Calculator Plan a savings goal by solving the time, monthly deposit, or ending balance with compound-growth assumptions and dated checkpoints.
Travel Schengen 90/180 Day Calculator Count Schengen short-stay days across moving 180-day windows, test a proposed trip, parse passport stamps, and plan a compliant re-entry date.
Psychology Schutte Self-Report Emotional Intelligence Test (SSEIT) Score all 33 SSEIT responses, verify the three reverse-keyed items, and read the 33 to 165 total without invented cutoff bands.
Education Scissor Skills Sheet Generator Create printable scissor skills worksheets with leveled paths, guide widths, start and stop cues, adult setup notes, and repeatable seeds.
Education Score Distribution Analyzer Analyze score lists or CSV marks as percentages and compare center and spread with grade bands, pass rate and potential outliers.
Education Search Algorithm Simulator Compare four search methods with repeatable probe traces and see how candidate ranges, data order and duplicates affect first-match or miss results.
Education Seating Chart Generator Build a reproducible classroom seating chart from names or CSV data with fixed seats and blocked desks, plus capacity checks and a printable plan.
Security Secret Pattern Sample Checker Scan config, log and ticket samples for secret-like values with masked findings plus provider signatures, entropy scoring and rotation guidance.
Security Secrets Rotation Planner Plan a secret rotation with staged cutover timing and consumer validation, rollback gates, and a transparent risk score without entering credentials.
Randomness Secure Password Generator Generate a unique password in your browser with adjustable character rules, unbiased random selection, and clear strength estimates.
Devtools Secure Shell (SSH) Client Config Editor Edit an SSH client config locally, test Host wildcards, preserve Match and Include text, and flag risky or duplicate directives before use.
SSH Secure Shell (SSH) Key Fingerprint Checker Check an SSH public key locally, compare modern or legacy fingerprints, and review host-key identity warnings before trusting the key.
Data Format Secure Shell (SSH) Public Key Converter Convert SSH public keys among OpenSSH, SSH2 and PEM locally while verifying key identity through matching SHA-256 fingerprints and safety checks.
Data Format Secure Shell (SSH) Public Key Extractor Extract a supported SSH public key locally, verify its SHA-256 fingerprint, and assemble a reviewed authorized_keys entry from key material.
Data Format Secure Sockets Layer (SSL) Certificate Converter Convert PEM/DER/P7B/PFX certificates in your browser and inspect chain expiry plus private-key requirements before downloading.
PKI Secure Sockets Layer (SSL) Certificate Decoder Decode X.509 certificate text or files locally and review validity, DNS coverage and key details alongside fingerprints and chain entries.
Psychology Self-Compassion Scale Short Form (SCS-SF) Assessment Score the 12-item SCS-SF, apply reverse keying correctly, and read the 1 to 5 overall mean with cautious paired orientation cues.
Devtools SemVer Bump Required Checker Check release notes and commit subjects for the required SemVer bump, then verify whether a planned version covers the strongest change signal.
Quiz Semaphore Signals Quiz Practice sender-oriented A-Z semaphore recognition with reproducible rounds, pose-specific feedback, and focused replay of missed letters.
Devtools Sequence Diagram Generator Turn a bounded participant-and-message definition into an inert sequence diagram with line-level validation and an ordered interaction ledger.
Sewing Sewing Thread Consumption Calculator Estimate sewing thread by operation and stitch class, then turn garment demand into whole-package quantities with leftovers and cost.
Education Shape Tracing Sheet Generator Create a printable shape tracing worksheet with learner-sized outlines and repeatable ordering, plus activity prompts and page-density warnings.
Body Metrics Shoe Size Converter Convert foot length or a regional shoe label into cross-system sizes with adjustable allowance, retail rounding, and fit-drift guidance.
Electrical Shop Lighting Lumens Calculator Plan a shop lighting grid from room size and work-plane lux with fixture counts and spacing checks that allow for losses and energy use.
Education Sight Word Practice Sheet Generator Create sight-word practice sheets from classroom lists with repeatable activities, teacher review cues, and local TXT or CSV import.
Education Significant Figures Calculator Count significant figures in written decimals or scientific notation, resolve trailing-zero ambiguity, and preview half-up rounding error.
Finance Simple Interest Calculator Calculate flat simple interest from principal, annual rate, term and day-count basis with gross and net maturity amounts plus accrual checkpoints.
HTTP Sitemap URL Extractor Extract page and child-sitemap URLs from XML, text files or a public source and produce a normalized crawl list with row-level audit evidence.
HTTP Sitemap XML Generator Turn same-host URLs or paths into sitemap XML with normalization and exclusion checks, then review protocol limits before publishing.
Sleep Hygiene Sleep Debt Calculator Calculate recent sleep debt from a 7- or 14-night log with chronological deficits, optional surplus credit, recovery days and bedtime guidance.
Sleep Hygiene Sleep Hygiene Gap Checker Find the sleep habits adding the most routine friction, rank a focused reset plan, and retest the same changes over a chosen window.
Sleep Hygiene Sleep Hygiene Path Planner Rank sleep-hygiene priorities from completed screeners and diary estimates, with safety holds and cautious time-in-bed comparison rows.
Education Sleep Sound Generator Build a browser-based sleep masking sound with colored-noise recipes, adjustable filters and a conservative relative-volume cap plus timers.
Date Time Sleep Window Adjustment Planner Turn weekly sleep-efficiency values into a fixed-wake adjustment plan with explicit thresholds, bounded changes, and daytime-safety guidance.
Text Slug Generator Turn titles into readable slugs for URLs and identifiers with Unicode-aware cleanup plus length controls and collision-safe batch suffixes.
Home Maintenance Smoke Detector Placement Calculator Plan preliminary smoke alarm locations for bedrooms, sleeping areas and each level with purchase needs plus cooking, age and accessibility checks.
Storage Snapshot Storage Growth Calculator Estimate snapshot reserve from changed-block churn and retention, then test reduction and headroom against growth, burst load and current capacity.
Small Business Snow Plowing Seasonal Contract Calculator Build or audit a seasonal snow contract price from service and deicing costs, then test weather reserve, margin and event caps across winter scenarios.
Gardening Sod Pallet Calculator Estimate sod pallets from measured lawn area and supplier coverage, then apply waste and sales policy with optional load and installation checks.
Gardening Soil Amendment Calculator Plan compost, lime, sulfur, and gypsum amounts from bed size and soil-test targets, with product-strength, package, and cost estimates.
Gardening Soil Volume Calculator Calculate soil volume for raised beds and top-ups, then compare whole bags with bulk-order rounding and optional delivery-weight checks.
Energy Solar Panel Array Size Calculator Estimate solar module count and DC array size from electricity use, sun hours, losses, available area, and optional inverter sizing.
Energy Solar Payback Period Calculator Estimate rooftop solar cash payback from net cost and annual energy value, including tariff treatment plus degradation and maintenance assumptions.
Education Sorting Algorithm Simulator Step through eight sorting algorithms on entered or seeded arrays with verified order, stability and operation counts for each deterministic run.
Baking Sourdough Feeding Schedule Calculator Plan a sourdough feeding backward from peak time or forward from feeding time, with exact ingredient weights and a practical peak window.
Education Spelling Test Generator Turn a weekly word list into a reproducible spelling test with context prompts and teacher review cues, plus optional answers and challenge words.
Game Sports Scoreboard Tracker Keep a live multi-sport scoreboard with preset scoring actions, editable counters, undoable event history and clear manual-correction checks.
Home Improvement Spray Foam Kit Coverage Calculator Estimate spray foam kit coverage from area and installed depth, then adjust label yield for field loss and waste before whole-kit rounding.
Education Square Footage Calculator Calculate square footage for common shapes, then include deductions, waste, package coverage, material cost, and tax in one order estimate.
Devtools Stack Trace Signature Analyzer Group stack traces into repeatable fingerprints, compare frame evidence across common runtimes, and keep sensitive trace text in your browser.
Home Improvement Stair Stringer Calculator Lay out straight stair stringers from finished rise and tread run with checks for code limits, throat depth, stock length and support spacing.
Energy Standby Power Cost Calculator Estimate annual standby energy cost from measured watts and schedules, then test cuttable savings with payback plus bill and emissions context.
Game Starfield Screensaver Simulator Create a seeded starfield screensaver, tune perspective and motion, and check scene intensity against measured browser performance.
Networking Static Route Commands Generator Generate reviewed static-route commands across host and network CLIs with CIDR normalization plus priority checks and rollback-ready delete output.
Cardio Training Steps to Calories Calculator Estimate active calories from steps using distance and pace with body weight, load and terrain plus target steps and an adjustable uncertainty range.
Sleep Hygiene Stimulus Control Steps Planner Build a stimulus-control plan for insomnia with a rough leave-bed cue and fixed wake time, plus a quiet fallback activity and review checkpoints.
Storage Storage Cost per Pallet Calculator Compare warehouse and 3PL storage costs per average pallet, with handling fees and invoice minimums included on a 30-day monthly basis.
Moving Storage Unit Size Calculator Estimate a storage unit size from furniture and boxes, with separate floor allowances for bulky pieces and room to reach your belongings.
Strength Training Strength Progression Planner Project a week-by-week strength block with your chosen progression model plus plate rounding, deload rules and clear review flags.
Strength Training Strength Standards Calculator Compare a tested or estimated 1RM with bodyweight-based standards for four barbell lifts, including target gaps and plate-ready loads.
Education String Matching Algorithm Simulator Compare four exact string-matching methods with Unicode traces showing preprocessing and shifts plus overlap and hash-collision handling.
Home Improvement Stud Wall Framing Calculator Estimate lumber and cost for one stud wall run with openings and plates, plus cut lengths, waste allowance and whole-board purchase rounding.
Quiz Subdivision Flags Quiz Practice 802 curated state, province, region, and territory flags by country set with seeded rounds, corrections, and missed-flag replay.
Home Improvement Subfloor Sheets Calculator Estimate a full-sheet subfloor order from dimensions or measured area with waste and accessory quantities plus blocking checks and panel cost.
IP Addressing Subnet Planning Suite Plan IPv4 child subnets from a parent CIDR, compare post-reserve host capacity, and pack ordered VLSM demands into valid boundaries.
Education Substitute Teacher Plan Generator Build a substitute teacher packet from schedules and lesson notes with readiness checks for routines, safety details and return guidance.
Home Systems Sump Pump Size Calculator Size a sump pump by combining peak inflow with total dynamic head, then compare manufacturer-rated capacity and check cycling risk at that duty point.
Productivity Survey Questions Generator Draft survey questions for a specific goal and audience with a controlled response mix plus completion, wording, and pilot checks.
Networking Switchport Config Generator Build access or trunk switchport CLI for IOS, NX-OS, and Arista EOS with normalized VLAN lists plus platform-aware syntax and paste-safety checks.
Transport Switzerland Rail Service Tracker Check Swiss station departures or arrivals with public timetable data and follow platform, delay, and route-stop changes for one service.
Sysadmin Syslog Severity Mix Analyzer Classify pasted syslog and application logs by RFC severity, measure the error-plus share, and spot emitters that cross your review threshold.
Sysadmin Syslog Storage Calculator Estimate searchable syslog storage from EPS and event size with retention, compression and index overhead plus stored copies and disk reserve.
Storage TB/TiB/GB/GiB Converter Convert TB/TiB/GB/GiB through exact byte totals and compare decimal vendor labels with binary system readouts without mistaking the gap for loss.
HTTP TLS Handshake Load Calculator Estimate TLS handshake CPU demand from request rate, connection reuse, full and resumed costs, surge traffic, and the available core budget.
Diagnostics TLS Handshake Trace Trace a live TLS handshake to review protocol and cipher, certificate identity and trust, plus DNS-to-negotiation timing from one remote probe.
DNS TLS-RPT Record Validator Validate a TLS-RPT policy from live DNS or pasted text, check report destinations and RFC rules, then build a reviewable TXT record.
Data Format TOML Converter Convert TOML into structured or flat configuration text with parse checks and warnings when the target cannot preserve types or nesting.
Data Format Tab-Separated Values (TSV) Converter Convert TSV and delimiter-separated text into typed table formats with local processing plus clear header, row-width and column-profile checks.
Date Time Tabata Workout Timer Plan and run classic 20/10 or custom Tabata-style intervals with exercise rotation and work-density totals, phase cues, and set recovery.
Data Format Table Data Converter Convert pasted or local table data into clean documents with repaired headers and row previews while checking missing cells and spreadsheet formulas.
Game Table Tennis Scoreboard Tracker Run a table tennis scoreboard with deuce-aware service rotation and game commits plus match formats, point cues, and an undoable rally record.
Events Tablecloth Size Calculator Calculate finished tablecloth dimensions by shape and desired drop, then compare stock sizes with floor-clearance and sewing allowances.
Home Systems Tank Capacity Calculator Calculate ideal tank capacity, partial liquid volume, headspace, and reserve allowance for rectangular or cylindrical geometry.
Education Tap-Tempo Beats Per Minute (BPM) Calculator Tap a rhythm to estimate quarter-note BPM, compare instant and rolling tempo, and judge timing stability from jitter and drift.
Cardio Training Target and Maximum Heart Rate Calculator Calculate a target heart-rate window from age or a known maximum, compare percent-max and Karvonen methods, and check a current reading.
Finance Tax Refund Estimator Estimate a 2025 or 2026 U.S. federal refund or balance due using ordinary income and the selected year's credits, payments, and safe-harbor rules.
Finance Tax Withholding Calculator Calculate 2026 U.S. federal paycheck withholding, compare a paystub with W-4 worksheet rules, and plan a per-check adjustment for the year.
Automation Tempo Generator / Metronome Set a metronome pulse and build a bounded practice ramp with tap tempo and swing timing plus beat-duration tables and local audio playback.
Education Ten-Frame Counting Sheet Generator Generate printable ten-frame practice for numbers 0 to 20 with task-aware filtering, repeatable mixes and optional answer keys for class use.
Psychology Ten-Item Personality Inventory (TIPI) Assessment Complete the official English TIPI to calculate five Big Five trait means, inspect each scored pair, and keep the brief profile in context.
Game Tennis Scoreboard Tracker Keep tennis score point by point across advantage or no-ad games with configurable tiebreaks plus server-first calls, undo and pressure-point cues.
Devops Terminal Installer Simulator Build a repeatable installer terminal rehearsal with synthetic timing and warning lines, package-manager vocabulary, and a seeded transcript.
Devops Terraform Plan Summary Analyzer Analyze Terraform plan JSON or text before apply, flag destructive changes and drift, and rank resources by review risk without uploading plan data.
Devops Terraform Variable Defaults Checker Review Terraform variable blocks for unsafe defaults and secret-like values, then prioritize type mismatches, version conflicts and fixes.
Devtools Test Case Generator Turn one feature workflow into traceable manual, Gherkin, or automation-ready test cases with risk coverage and focused review cues.
Education Test Curve Calculator Curve raw test scores with seven transparent methods, then review averages, caps, rounding, skipped rows, and grade-band changes.
Education Test Score Calculator Calculate a test percentage from correct, missed or earned points and check the grade band plus the exact points needed for the next cutoff.
Devtools Test Shard Runtime Calculator Estimate CI test shard wall time and runner minutes from suite work, setup overhead, split balance, efficiency, and job concurrency.
Devtools Text Diff Comparator Compare original and revised text locally through unified hunks and line alignment, with audited ignore rules and clear change counts.
Cryptography Text Encryptor & Decryptor Encrypt or decrypt small text locally with AES-GCM, Argon2id or PBKDF2, portable recovery metadata, and integrity checks for safer handoffs.
Encoding Text File Encoding Converter Re-encode a local text file as UTF-8, UTF-16, or Windows-1252 with BOM and line-ending controls plus recorded replacement details.
Security Text Hash Generator Hash exact UTF-8 text in your browser with SHA-2 or SHA-3 and verify byte counts, salt rules, and fixed-width digests before comparison.
Editor Text Sorter Sort pasted or file-loaded text with locale-aware and natural order, cleanup filters, repeatable shuffle and local browser processing.
Education Theoretical Yield Calculator Find the limiting reagent and calculate theoretical product, excess remaining, and percent yield from a verified reaction and material basis.
Home Improvement Thinset Bag Calculator Estimate whole thinset bags from tile area and product coverage, including waste and back-buttering plus bag-size scaling and optional spares.
Devtools Thread Pool Saturation Calculator Estimate thread pool saturation from arrival rate and task time plus queue pressure, with wait-target checks, headroom warnings and capacity scenarios.
Transport Tie Down Strap Capacity Calculator Plan cargo tie-down count and capacity from weight, WLL, strap path, blocking, and length rules with weak-link and margin checks.
Home Improvement Tile Calculator Calculate full tile boxes from measured area and tile module size, then add waste, spare stock and cost checks for a practical buying plan.
Home Improvement Tile Grout Bags Calculator Estimate tile grout packages from area and joint geometry, then account for product factor, waste, whole-package rounding, and leftover.
Date Time Time Calculator Calculate elapsed time or shift a clock value with overnight handling and break deductions, plus exact results or optional policy rounding.
Date Time Time Zone Meeting Overlap Calculator Find meeting windows across supported IANA time zones, then compare full work-hour overlap with weighted fallback times for each participant.
Photography Time-lapse Plan Calculator Calculate time-lapse frames, interval, clip length or shoot duration, with optional storage, battery, exposure and scheduling checks.
Date Time Timecode Duration Calculator Calculate frame-accurate timecode spans with drop-frame validation and endpoint rules, then add 24-hour wrap or pull handles when needed.
Devtools Timing Diagram Generator Turn strict WaveJSON into a browser-rendered timing diagram with bounded lane validation, source-order review, and SVG or image output.
Finance Tip Calculator Calculate a restaurant tip from the right receipt base, include tax or service charges, and split the final total with visible rounding checks.
Automotive Tire Replacement Cost Calculator Estimate installed tire replacement cost for one, two or four tires with tax and fees plus rebates, mileage value and shop-quote comparison.
Automotive Tire Size Comparison Calculator Compare tire sizes for diameter, width, ride-height and speedometer changes with fitment screening and measured-clearance checks.
Diagnostics Trace CNAME Alias Chain Trace every visible CNAME hop for a public hostname and compare resolver views before verifying the terminal DNS answer and provider suffix.
Networking Traceroute Hops Analyzer Parse traceroute, tracert or MTR output locally and compare hop delays with no-reply or downstream-loss patterns before escalating a route issue.
Education Tracing Worksheet Generator Create printable tracing worksheets for names and early-writing practice with adjustable support progression, formation cues, and page planning.
Transport Trailer Payload Capacity Calculator Calculate trailer cargo capacity from GVWR and measured weight, then compare reserve, axle and tire limits to find the controlling margin.
Automotive Trailer Tongue Weight Calculator Calculate trailer tongue weight from direct or lever readings and vehicle-scale tickets with checks for balance, hitch capacity and payload.
Electrical Transformer Calculator Calculate transformer turns and full-load current from RMS voltage and VA inputs, with impedance-ratio checks plus single- or three-phase review.
Text Translation Quote Calculator Build a translation quote from source words and CAT leverage, then check delivery pressure, project fees and gross margin before setting tax or deposit.
Travel Travel Per Diem Calculator Estimate daily travel per diem from verified M&IE rates and lodging caps, including travel-day proration plus provided-meal deductions.
Travel Travel Time Calculator Plan segmented travel time, stops, a schedule allowance, and time-zone-aware arrival from entered distances and average speeds.
Cooking Turkey Thawing Time Calculator Plan a whole turkey's thawing schedule from weight and cooking time, with refrigerator or cold-water estimates and handling checkpoints.
Text Two List Comparator Compare two lists as sets or duplicate-aware multisets using explicit separators and Unicode normalization, with count deltas in an item ledger.
Devtools TypeScript Formatter Format TypeScript or TSX locally with explicit grammar and style choices, syntax feedback, and line-width checks before copying the code.
Devtools TypeScript Validator Check one TypeScript or TSX file with pinned compiler diagnostics, target and strictness choices, and explicit project-context limits.
Psychometrics U.S. Adult Food Security Survey Module Classify adult household food security from the official 10-item USDA module with three-stage screeners, raw-score bands, and local scoring.
Exam Prep U.S. Amateur Radio Extra Exam Prep Prepare for U.S. Amateur Extra with 50-question exam-shaped rounds and answer review from the 2024–2028 pool with February 2026 errata.
Exam Prep U.S. Amateur Radio General Exam Prep Prepare for the U.S. General amateur radio exam with unofficial pool study, 35-question rounds and explanations for missed answers.
Exam Prep U.S. Amateur Radio Technician Exam Prep Practice for the U.S. Technician amateur radio exam with unofficial 2026–2030 pool study, 35-question rounds and missed-answer review.
Quiz U.S. Boating Safety Quiz Review U.S. boating safety through motorboat and paddlecraft scenarios, with explanations of equipment, navigation and weather decisions.
Exam Prep U.S. Citizenship Civics Exam Prep Practice U.S. citizenship civics with typed answers and missed-question review, using the 2025 study list with dated officeholder checks.
Quiz U.S. Consumer Scam Awareness Quiz Recognize U.S. consumer scam tactics in realistic scenarios and learn why independent checks and safer responses matter before acting.
Psychometrics U.S. Food Security Survey Module — Six-Item Short Form Score the USDA six-item household food-security short form with official branching, status bands, and a privacy-aware answer review.
Psychometrics U.S. Household Food Security Survey Module Classify household food security with official USDA screeners and thresholds that adapt to whether children under 18 are present.
Finance UK Take-Home Pay Calculator Estimate UK take-home pay for 2026/27 using PAYE and National Insurance with pension, tax-code, student-loan and pay-frequency rules.
Electrical UPS Runtime Calculator Estimate UPS runtime from real load and battery energy while applying efficiency and health factors, reserve, watt and VA limits and shutdown margin.
Security URL Blacklist Status Lookup Check a suspicious URL with Safe Browsing and SURBL plus weighted string clues, then review every source's scope and gaps before choosing a safer next step.
Encoding URL Encode and Decode Tool Encode or decode URL text by context, handle form-style plus signs and nested escapes, and check round-trip or double-encoding risks locally.
HTTP URL Parser Parse a URL or query string locally, inspect components and duplicate parameters while masking token-like values for a safer review copy.
HTTP UTM URL Generator Build a campaign URL with consistent UTM tags while preserving useful query values and flagging naming, channel, or length issues.
Encoding Unicode Character Lookup Inspect a character or escape and compare its U+ value with UTF encodings and normalization forms while revealing invisible text and grapheme structure.
Encoding Uniform Resource Locator (URL) Decoder Decode percent-encoded URLs or text, inspect characters and query structure, and clean trackers or duplicate parameters without fetching the destination.
Encoding Uniform Resource Locator (URL) Encoder Encode URL components, complete links, form values, or paths with context-aware percent escapes, UTF-8 byte details, and local query checks.
Data Format Unit Converter Convert measurements across 21 categories with auditable base-unit formulas, flexible precision, and checks for temperature and fuel economy.
Finance Unit Price Calculator Compare two package prices on the same usable unit basis, accounting for multipacks and expected waste plus shared discounts or checkout fees.
Encoding Universally Unique Identifier (UUID) Decoder Decode a UUID into canonical text and inspect its version, variant, bit fields and embedded time with checks for sentinel or legacy layouts.
Devtools Universally Unique Identifier (UUID) Generator Generate random, name-based or time-ordered UUIDs and inspect canonical form with version semantics, bit allocation and privacy tradeoffs.
Quiz Unix File Permissions Quiz Translate Unix permission bits between symbolic and octal modes, then practise file, directory and special-bit rules with explanations.
Finance Uppercase RMB Amount Converter Convert an RMB amount into uppercase Chinese financial numerals, with exact fen handling and a digit-by-digit review before using the wording.
Devops Uptime Calculator Calculate allowed downtime and budget use from an SLA or SLO target, with burn pace and projected availability under a chosen maintenance policy.
Productivity User Story Generator Draft a user story with a clear role, goal and benefit, then turn acceptance checks into structured criteria with readiness or splitting warnings.
Devtools User-Agent Parser Parse a User-Agent string or header block into a readable browser profile with device, crawler and Client Hints evidence for reliable triage.
Finance VAT Calculator Calculate VAT from net, gross or VAT-only amounts with exact posted-cent arithmetic, then compare per-unit and invoice-total rounding results.
Networking VLAN Capacity Calculator Plan VLAN ID capacity across reserved and existing ranges, then test allocation runway and IPv4 host fit for each new segment.
Networking VLAN Config Consistency Checker Compare switch VLAN evidence with intended trunk and native rules plus database, reserved-VLAN, and VLAN 1 policy before a change.
Networking VLAN Migration Planner Turn pasted port moves into timed VLAN migration waves with risk and native-VLAN checks, validation gates and an explicit rollback plan.
Sysadmin VM Migration Time Calculator Plan a VM migration window from memory and disk payloads, using dirty-page churn and usable bandwidth to estimate total time and downtime.
Networking VPN Tunnel Capacity Calculator Estimate practical VPN concurrent-user capacity from tunnel rate and packet overhead with gateway limits, busy-hour demand, and MTU risk checks.
Wireless VSWR Return Loss Converter Convert VSWR or return loss into exact RF mismatch values and power splits with support for reflection coefficient, reflected watts and review guidance.
Videography Video Audio Extractor Extract one audio track from a local video as compatible MP3, editable WAV, or copied original packets with post-conversion verification.
Videography Video Bitrate Storage Calculator Plan video storage from bitrate and recording duration, including multiple cameras and copies plus headroom and whole-drive capacity checks.
Productivity Video Call Sheet Generator Build a one-day video call sheet with staggered crew calls, schedule conflict checks and calendar-ready events for the production day.
Videography Video Compressor Compress a local video into a smaller MP4 while balancing picture and audio bitrate, then verify playback and measured savings before download.
Videography Video Cropper Crop a video to a fixed rectangle or delivery aspect ratio in your browser, verify the playable MP4, and review how much frame area remains.
Videography Video Format Converter Convert a local video to MP4 or WebM while preserving compatible streams and verifying its codecs, dimensions and playback before download.
Videography Video Frame Extractor Extract one frame or a timed image sequence from a local video, then compare requested and decoded times before downloading the result.
Videography Video Merger Join local video clips into MP4 or WebM, normalize frame and sound handling, verify every join, and keep source files in your browser.
Videography Video Metadata Inspector Inspect one local video for container and stream evidence, with bounded file reads plus clear warnings for sampled or missing metadata.
Videography Video Resizer Resize a local video to exact even dimensions with whole-frame fit or centered crop, optional upscaling and audio control in a verified MP4.
Videography Video Speed Changer Change a local video's speed from 0.25× to 4× in your browser, preview the duration, and choose tape-style retimed audio or a muted MP4.
Videography Video Trimmer Trim a local video to a reviewed interval, preview the playable clip, and keep the source file in your browser instead of uploading it.
Videography Video Watermarker Add a text or logo watermark to every video frame in your browser, preview its placement, and download a re-encoded MP4 with audio when supported.
Videography Video to GIF Converter Turn a short video clip into an animated GIF in your browser with adjustable timing, dimensions and frame rate plus color and looping controls.
Image Virtual Flowers Generator Create a virtual flower card with a personal greeting and repeatable bouquet layout, then verify shared settings before sending the link.
Storage Virtual Machine Storage Calculator Estimate spike-safe VM datastore capacity with provisioning and snapshot pressure plus reserves, protection overhead and current-pool runway.
Devops Virtualization Host Capacity Calculator Estimate safe virtualization host capacity after failure and maintenance reserves, including growth headroom and large-VM placement checks.
IP Addressing Visual IPv4 Subnet Calculator / Splitter Split an IPv4 parent block into visual CIDR leaves, rejoin aligned siblings and verify each range, usable count and complete address coverage.
Education Visual Schedule Cards Generator Create printable visual schedule cards from routine rows with picture cues and first-then options plus timing estimates and page planning.
Education Vocabulary Matching Sheet Generator Create a reproducible vocabulary matching worksheet from term-definition pairs with seeded shuffles, distractor review and a verified answer key.
Game Volleyball Scoreboard Tracker Track volleyball rally points and serving changes with set commits plus timeout counts, rotation cues, and indoor or beach scoring rules.
Electrical Voltage Divider Calculator Size or analyze a loaded voltage divider and check preferred resistor values, output sag plus tolerance, current and power before building.
Security Vulnerability Remediation SLA Calculator Turn vulnerability backlog CSV into policy-based due dates and owner-ready remediation priorities with overdue, due-soon and compliance signals.
Networking WAN Latency Calculator Estimate WAN round-trip latency from route distance and path overhead to compare target headroom, dominant delays and serial application wait.
Quiz WCAG 2.2 Accessibility Quiz Practise WCAG 2.2 through 38 original accessibility scenarios with sourced explanations of criterion boundaries and conformance levels.
Devops WHOIS / RDAP Lookup Check domain registration data through RDAP with WHOIS fallback, then review expiry timing, nameservers and evidence coverage for follow-up.
Storage WWN and NAA Identifier Lookup Extract WWN and NAA values from SAN text and normalize the hex before decoding identifier fields or flagging fragments for operational review.
Body Metrics Waist to Hip Ratio Calculator Calculate waist-to-hip ratio from mixed-unit measurements, compare WHO screening cutoffs, and see whether tape uncertainty crosses a boundary.
Body Metrics Waist-to-Height Ratio Calculator Calculate waist-to-height ratio from mixed units and compare the unrounded result with current NICE central-adiposity bands and waist targets.
Home Improvement Wallpaper Calculator Estimate wallpaper rolls from wall dimensions and full-strip yield while accounting for pattern repeat, openings, waste and cost before ordering.
Storage Warehouse Pallet Capacity Calculator Estimate warehouse pallet positions for back-to-back racks and compare row directions with height limits and blocked positions included.
Household Washing Machine Capacity Calculator Estimate washing machine capacity from household laundry or weighed baskets, with weekly cycle comparisons and optional space allowances.
Home Systems Water Heater Size Calculator Size storage and tankless water heaters from peak-hour volume, overlapping fixture flow and temperature rise with reserve and install checks.
Nutrition Water Intake Calculator Plan a daily drink target from total-water references and exercise sweat with food-water adjustments, serving counts and safety cautions.
Home Systems Water Softener Size Calculator Size a home water softener from tested hardness, iron and softened-water demand with regeneration, salt-use and peak-flow checks.
Home Systems Water Well Pump Size Calculator Size a well pump at the required flow and total dynamic head, then screen well yield plus pipe velocity, tank drawdown and pump-curve fit.
Devtools Web App Manifest Generator Build a web app manifest with scoped launch paths and icon entries plus install markup and static readiness checks before browser testing.
Diagnostics Web Server Detector Detect visible server and application clues at a public URL, including CDN or proxy evidence across redirects and a clear confidence score.
HTTP WebSocket Connection Capacity Calculator Size a WebSocket node pool from peak connections and measured per-node limits with bottleneck, N+ reserve and scale-out checks.
Devtools WebSocket Connection Tester Test an authorized WebSocket endpoint from your browser with bounded traffic and inspect timing, close codes, the selected subprotocol and optional payload previews.
Events Wedding Budget Breakdown Calculator Build a reserve-first wedding budget with category targets and quote pressure, then track paid balances, reserve gaps and near-term cash needs.
Productivity Wedding Invitation Card Generator Design a wedding invitation with format-aware copy checks, RSVP QR support, and checksum-verified guest links for print or phone sharing.
Productivity Weekly Workout Schedule Planner Build a seven-day workout schedule for your goal and available days with equipment-aware sessions, recovery checks and guideline totals.
Body Metrics Weight Loss Calculator Plan an adult weight change from body measurements and timing with an adaptive calorie estimate plus pace warnings and BMI context.
Body Metrics Weight-for-Age Percentile Calculator Calculate a child's weight-for-age percentile from WHO or CDC reference data with corrected-age handling and clear screening limits.
Body Metrics Weight-for-Length Percentile Calculator Calculate weight-for-length percentile from WHO or CDC references with measurement correction, source comparison and growth-context cautions.
Education Weighted Grade Calculator Calculate a weighted course grade from percentage weights or points, then estimate the average needed on remaining work and flag mismatched totals.
Education Weighted Rubric Score Calculator Calculate a weighted rubric score with percent or relative-point weighting and check criterion contributions, grade bands and rounding effects.
Devops Wget Command Generator Build a shell-quoted wget command for single downloads or recursive retrieval, with import parsing and warnings for risky options.
Devtools What Is My Browser Identify your current browser session, check storage and graphics readiness, and review privacy exposure before sharing a support report.
IP Addressing What Is My Internet Protocol (IP) Address? Check the public IPv4 or IPv6 address visible to your browser, with ASN, network owner, approximate location, and provider coverage.
Diagnostics What Is My Screen Resolution Check your current viewport and screen resolution, compare responsive breakpoints, and estimate device-pixel capture size from browser readings.
Automotive Wheel Offset Fitment Calculator Compare wheel width and offset changes to estimate inner clearance and outer poke, then record measured gaps without claiming certified fitment.
Home Systems Whole-House Water Filter Size Calculator Estimate a whole-house water filter class from peak fixture flow and pressure limits, with source-water and replacement timing checks.
Wireless Wi-Fi AP Coverage Capacity Calculator Estimate a preliminary Wi-Fi access point count from coverage and busy-hour capacity with growth reserve, driver comparison and survey warnings.
Wireless Wi-Fi Channel Plan Calculator Build a first-pass Wi-Fi channel plan across 2.4, 5 and 6 GHz access points with DFS filtering, PSC primaries and reuse warnings.
Small Business Window Cleaning Quote Calculator Build a window cleaning quote from scope and site difficulty while protecting labor cost, minimum price and target gross margin.
Energy Window U-value Calculator Compare current and proposed whole-window U-values, then estimate conductive heat-flow and seasonal differences with consistent unit conversion.
Electrical Wire Gauge Calculator Size an AWG conductor with voltage-drop and ampacity checks using current, run length, material and a temperature reference column.
Security WireGuard Config Generator Generate WireGuard server and client configurations with CIDR validation, route-scope warnings, and explicit placeholders for safer key handling.
Education Word Counter Count words and measure readability locally in drafts or TXT files, with configurable token rules and focused repetition checks for editing.
Education Word Scramble Generator Create repeatable word scramble worksheets from words and optional hints with difficulty controls plus answer keys and source-list checks.
Education Word Search Generator Build a repeatable word search from an A–Z list with seeded placement and direction controls plus play mode and a checked answer key.
Education Work and Power Calculator Calculate mechanical work and average power from force acting over a distance and time, with angle-based sign checks and unit conversion.
Finance Working Capital Calculator Classify balance-sheet items and calculate working capital, current ratio, and quick ratio for a consistent reporting-date review.
Strength Training Workout Rounds Tracker Score AMRAP or for-time and interval round logs with rep totals and split pace plus RPE audit flags and browser-saved session snapshots.
Strength Training Workout Volume Calculator Calculate workout tonnage and density from logged sets and bodyweight work, then compare weekly hard sets using consistent RPE and load assumptions.
Quiz Workplace PPE Selection Quiz Review workplace PPE decisions for U.S. general industry through 30 original scenarios on hazard assessment, fit and training duties.
File Tools XLS to XLSX Converter Convert a legacy XLS workbook to XLSX in your browser with structural verification and clear warnings about formulas, macros and visual fidelity.
File Tools XLSX Compressor Compress XLSX pictures in your browser, verify preserved workbook parts, and review exact byte savings before downloading the rebuilt file.
File Tools XLSX to CSV Converter Convert one Excel worksheet to CSV in your browser, choose formula and hidden-data handling, and review warnings before download.
Data Format XML Diff Comparator Compare XML as parsed structure with keyed or positional node matching, namespace and whitespace policies, and exact path-level change evidence.
Data Format XML Schema Validator Validate XML against a supplied XSD 1.0 Core schema with namespace-aware findings and blocked external resource resolution in your browser.
Data Format XPath Tester Test XPath against XML or HTML in your browser, verify namespaces and result types, and inspect matched nodes before copying runtime code.
Data Format YAML Converter Convert YAML locally into structured JSON or normalized YAML and flat configuration text, with path and type checks that expose lossy transformations.
Data Format YAML Diff Comparator Compare two YAML documents as parsed data with schema-aware scalar types and sequence matching, then review path-level changes and ignored paths.
Data Format YAML Formatter Format YAML for review or stable diffs and inspect its document structure while catching comments, aliases or directives that may change.
Data Format YAML Validator Validate YAML locally with selectable scalar schemas, strict duplicate-key checks, and bounded path evidence for single or multi-document input.
Baking Yeast Type Converter Convert dry and fresh yeast amounts into approximate substitute weights with preparation guidance and optional flour-based baker’s percentages.
Storage ZFS Capacity Calculator Calculate planned ZFS capacity after vdev protection, RAID-Z padding and operating reserves before choosing disks or comparing topologies.
Devtools cURL Command Generator Build a shell-ready cURL command from request fields or an existing command with body validation and safe quoting, plus credential warnings.
Devtools cURL to Code Converter Turn one cURL HTTP request into code for eight mainstream clients with local parsing, default secret redaction and compatibility warnings.
Shell chmod Calculator Translate Unix permission bits into octal and symbolic chmod commands, then review baselines plus special-bit, recursion and symlink risks.
DNS dnsmasq DHCP Config Generator Generate a dnsmasq IPv4 DHCP scope with CIDR and pool checks plus reservations, client options and optional PXE lines for a review-ready config.
Sysadmin iptables Rule Generator Build bounded iptables or ip6tables commands for a packet path with explicit CIDR and port matches, persistence choices, and production-safety checks.
Devtools npm Audit Summary Analyzer Analyze npm audit JSON or terminal output into a severity-weighted release gate and prioritized remediation queue with local processing.
Sysadmin systemd Unit Generator Draft a systemd service unit from workload, account, restart and hardening choices with local review findings and host verification commands.

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