Secure Password Generator

Introduction:

Password strength reflects how hard it is for an attacker to guess or brute-force a secret string that guards your accounts, devices, or documents; longer, unpredictable combinations raise difficulty exponentially, discouraging automated cracking attempts without increasing your workload.

This tool creates random passwords on demand, then evaluates each candidate with a client-side strength engine that estimates entropy, expected crack time, and visualises progress so you can balance security against memorability before adopting the result.

You might generate a new passphrase when onboarding to a service, rotating credentials at work, or hardening a personal vault—*always store the output in a safe place and never reuse old secrets across multiple accounts*

Technical Details:

The generator runs entirely in the browser, relying on the Web Crypto API for high-quality randomness, a lightweight strength estimation engine for instant feedback, and progressive enhancement to ensure accessibility without external dependencies or network calls.

Custom Length Control

Specify any value between 1 – 100 characters; the interface validates input and recalculates entropy dynamically.

Character Set Filters

Toggle uppercase, lowercase, numbers, symbols, and ambiguous exclusions to tailor complexity and readability.

Real-Time Strength Meter

A colour-coded progress bar maps entropy to a four-point score, giving clear visual guidance before adoption.

Entropy & Crack-Time Estimate

The engine converts symbol space into bits of entropy and projects offline cracking duration for transparent risk assessment.

Offline Operation

No data leaves your device; generation, analysis, history, and downloads occur locally to protect privacy.

Step-by-Step Guide:

1. Enter the desired Length value.
2. Click the Characters toggle to reveal options.
3. Select Uppercase, Lowercase, Number, or Symbol checkboxes.
4. Enable Exclude ambiguous optional or Unique characters for extra clarity.
5. Press Regenerate to create a password and review strength indicators.
6. Use Copy or Download TXT to save, and browse History or Stats tabs for reference.

FAQ:

Troubleshooting:

• Copy button does nothing—your browser may block clipboard access; refresh permissions or try manual selection.
• Progress bar stays grey—at least one character category must remain enabled to compute strength.
• Entropy shows “0 bits”—set length above one character and regenerate.
• Downloaded file is empty—ensure you regenerated the password after adjusting options.
• History list lost—clearing browser storage or using private mode resets previous entries automatically.

Advanced Tips:

• Set length above 16 characters for services that allow long passphrases.
• Combine unique characters with symbol inclusion to counter rainbow-table attacks.
• Use history to compare entropy trends across multiple generations.
• Download and store TXT files in an encrypted vault for long-term safekeeping.
• Rotate passwords every 90 days and avoid patterns across different accounts.

Glossary:

Entropy

Quantifies randomness in bits; higher numbers indicate stronger passwords.

Strength Score

Four-level rating that reflects how resistant a password is to cracking.

Ambiguous Characters

Visually similar symbols that can cause mistyped entries.

Clipboard

Temporary storage area used when copying data within the operating system.

Crack Time

Estimated duration an attacker needs to guess the password with modern hardware.