LaTeX Editor

LaTeX Preview

{{ displayModeLabel }} · Updated {{ renderedAtLabel }}

{{ charCount }} chars {{ lineCount }} lines {{ macroCount }} macros {{ uniqueMacroCount }} unique Undefined {{ unknownMacroNames.length }} {{ renderStatusMeta.label }}

LaTeX source:

Type LaTeX math or load one .tex/.txt file; examples: \frac{a}{b}, \alpha, \begin{matrix}.

Check macro {{ nearestUnknownMacro().name }} near position {{ nearestUnknownMacro().index }}.

Display style:

Choose Display for centered equations or Inline for formulas inside prose.

Snippet search:

Examples: fraction, alpha, matrix, align, cases.

Insert tools:

Place the cursor first; star snippets you reuse often.

Export background:

Choose White, Soft gray, or Transparent before downloading PNG, WEBP, JPEG, or PDF.

Export scale:

Choose 1x to 4x; use 2x or 3x for sharper slides and documents.

Error near position {{ renderErrorDetails.position }}.

Check macro: {{ renderErrorDetails.macro }}

Start typing to see the equation render.

Loading MathJax...

Preview unavailable. Check your LaTeX and try again.

Rendering failed. Adjust your LaTeX input.

Metric	Value	Copy
{{ row.label }}	{{ row.value }}

Check	Status	Finding	Action	Copy
{{ row.check }}	{{ row.status }}	{{ row.finding }}	{{ row.action }}

Macro	Status	Count	Share	Copy
{{ row.macro }}	{{ row.status }}	{{ row.count }}	{{ row.share }}

Macro statistics will appear once your LaTeX includes commands such as \frac or \alpha.

{{ asciiSource }}

{{ asciiError || 'AsciiMath output will appear once the expression can be converted.' }}

MathML not available yet. Render the preview to populate this tab.

{{ trimmedLatex }}

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Introduction

LaTeX is a compact way to write mathematical notation as text. That is useful when you need fractions, roots, matrices, aligned steps, accents, or custom operator names in a form that can be copied, revised, and versioned. It also means a missing brace, a mistyped macro, or an unfinished environment can change the rendered result immediately.

This editor is built for that snippet-level drafting work. You can type directly, paste from the clipboard, load a local .tex or .txt file, insert structures from toolbar menus, search symbol groups, keep favorite snippets close, and watch the expression render as you work. The same page also exposes summary metrics, macro counts, MathML, AsciiMath, and the raw source so you can inspect more than the visual output alone.

It fits the part of the workflow where one equation has to move between lecture notes, assignments, slide decks, documentation, or manuscript drafts. A rendered image may be enough for a slide. A structured markup export may be better for a web pipeline. A short CSV or DOCX summary may be better when you are reviewing a formula with someone else and want a simple handoff artifact rather than a screenshot.

The scope stays focused. This page helps with expressions and math fragments, not full document builds. It does not manage bibliographies, page layout, package installation, or complete multi-file projects. If your work depends on a full preamble and document compilation, this page is better used as a staging area for the math itself than as the final publishing environment.

The privacy model is mostly local to the browser after the page loads. File reads, rendering, conversions, clipboard writes, and downloads happen on the page itself. Favorites and recent snippets are saved in this browser profile, and a shared page URL can include the current expression and display mode when they differ from the defaults. That makes repeat visits convenient, but it also means the link can reveal the formula text if you send it to someone else.

Technical Details

The editing model is source-first. The page keeps your LaTeX snippet as the primary state, waits briefly for input to settle, then rebuilds the preview from that text. A successful render produces a preview image in SVG form and a MathML representation. The AsciiMath tab is then filled either from a direct conversion path or from a fallback pass over the generated MathML. If the expression does not render, the markup exports stay unavailable because they depend on the same successful conversion step.

Display math and inline math are separate output states, not just cosmetic labels. Display math treats the expression as a stand-alone block, which is usually easier to read for larger formulas. Inline math keeps the expression tighter so it can sit inside running text. If you are preparing material for both a paragraph and a slide, switching between those modes before export is a practical way to check spacing and balance.

One snippet drives every result tab, so a structural problem usually affects the preview, markup tabs, and image exports together.

Structural checks performed by the LaTeX editor
Check	What the page looks for	Why it matters
Brace balance	Opening and closing braces, with escaped braces ignored	Catches broken grouping before a fraction, root, or text block spreads the error further down the expression.
Environment pairing	Matching `\begin{...}` and `\end{...}` names	Flags unfinished matrix, cases, align, and similar block structures that often fail to render cleanly.
Macro classification	Separates structural commands, user-defined commands, and possible unknown macros	Helps distinguish a real custom command from a typo or a command the current snippet never defines.
Macro frequency	Counts non-structural macros and calculates each command's share of the total	Shows which commands dominate the expression, which is useful when reviewing a dense formula or comparing revisions.

Export and output choices in the LaTeX editor
Output	What you receive	Best use
SVG	A vector copy of the rendered preview	Best when the formula needs to stay sharp in slides, documents, or scaled layouts.
PNG, WEBP, JPEG	Raster exports made from the preview with selectable background and scale	Useful for messaging apps, learning systems, quick embeds, or image-first workflows.
PDF	An A4 page containing a rasterized preview image	Useful when someone expects a document-style file rather than a standalone image.
MathML	Structured math markup	Useful when the expression needs to move into web or accessibility-oriented markup workflows.
AsciiMath	Plain-text math notation produced directly or from the MathML fallback path	Useful for text-first systems where rich math markup is not the target format.
CSV, DOCX, and source	Summary metrics, macro tables, or the raw snippet	Useful for reviews, handoff notes, or keeping the exact source beside the rendered result.

The summary tab is source-driven rather than appearance-driven. It counts characters, lines, macros, unique macros, and possible undefined macros from the current snippet text. The macro table then turns that into a usage ledger, which is often more revealing than the rendered formula when you are auditing repeated commands or checking whether a custom shorthand is actually being used consistently.

A few limits are worth keeping in mind. The PDF file is not a vector math export; it wraps a rasterized preview on a page. The DOCX summary can include the same kind of preview image when available. If your downstream workflow depends on scale-independent graphics or later styling, the SVG and markup exports are usually the stronger choices.

Everyday Use & Decision Guide

Start with the question you actually need to answer. If you only need to know whether the math looks right, the Live preview tab is enough. If you are preparing a formula for a website or another math-aware system, go straight to MathML or AsciiMath. If you are reviewing complexity, repeated commands, or a suspected typo, the Summary and Macros tabs are the fastest read.

The editing aids are strongest when you use them for structure, not decoration. Toolbar actions wrap an existing selection in a fraction, root, delimiter pair, text block, matrix, or accent. Snippet menus help when you remember the kind of symbol you need but not the exact command. The reference buttons for package lines and \newcommand stubs are useful when you are drafting a reusable snippet and want the standard scaffolding close at hand.

For exports, choose the format by what must survive after the formula leaves this page. SVG keeps sharp edges and is usually the safest graphic export. PNG, WEBP, and JPEG are convenient when the next stop is an image slot. PDF is mainly a page-shaped wrapper. MathML keeps structure. AsciiMath keeps portability as plain text. CSV and DOCX matter when the metrics or macro table are part of the review, not just the rendered equation.

Use Display math when the formula stands on its own and line breaks or operator spacing matter visually.
Use Inline math when the expression needs to sit inside a sentence and you want to check the tighter layout first.
If a warning mentions an undefined macro, add the missing definition to the snippet when that command is truly custom instead of immediately assuming the renderer is wrong.
If you reuse the same symbols often, saving favorites is faster than rebuilding the same insertion pattern each time.

There is one sharing caution. Favorites and recents stay in local storage on this browser, which is convenient but local to this device. The current snippet can also appear in the page URL. That makes repeat work easy, yet it also means a copied link can carry the equation text with it.

Step-by-Step Guide

Type a LaTeX expression, paste one from the clipboard, or load a local .tex or .txt file.
Use the toolbar and snippet groups to insert structures such as fractions, roots, matrices, delimiters, accents, operators, or common symbols.
Watch the summary badges and warning area while the expression renders, especially if the snippet includes custom commands or environments.
Switch between Display math and Inline math before export if the final placement context matters.
Open Summary, Macros, AsciiMath, MathML, or LaTeX source based on whether you need appearance, diagnostics, alternate markup, or the raw text.
Export only after the preview and the result tab you care about both look correct for the destination you have in mind.

Interpreting Results

The render badge is the first status to trust. Rendered means the preview, SVG copy, and MathML output are available. Loading and Rendering are temporary states. Error means the conversion did not finish, so the preview and markup tabs cannot be treated as complete.

How to read common outputs and warnings in the LaTeX editor
Visible cue	Best first reading	What to check next
Possible undefined macros	The page found command names that are neither built in nor defined in the current snippet.	Check for typos first, then add the missing `\newcommand` only if the macro is genuinely custom.
Unbalanced braces	One group opens or closes in the wrong place.	Look near the most recent edit, especially around fractions, text blocks, and nested superscripts or subscripts.
Mismatched environments	A block such as `align`, `cases`, or a matrix form starts or ends incorrectly.	Check the matching `\begin{...}` and `\end{...}` names before changing anything else.
High macro count with low unique count	The expression repeats a small set of commands many times.	Open the macro table if you want to confirm that the repetition is intentional and not copied clutter.
AsciiMath differs from the LaTeX source	The notation changed because the target format is a different plain-text math language, not because the math necessarily changed.	Read it as a transport format, then confirm the meaning on the preview or MathML tab if the expression is delicate.
Preview looks correct but a warning remains	The snippet is renderable, but there may still be structural debt that could matter later.	Clear the warning before treating the snippet as final, especially if it will be reused in a larger document.

A clean render is not the same as mathematical correctness. This page can tell you a lot about structure, macro use, and output formats. It cannot tell you whether a derivation is conceptually right, whether the notation is standard for your field, or whether a copied expression uses the intended symbols. Use the structural checks as drafting help, then apply subject knowledge before publishing.

Worked Examples

A lecture-slide equation

Enter \int_{0}^{1} x^2 \, dx = \frac{1}{3} in Display math. The preview gives you a centered block equation, the MathML tab exposes structured markup, and the SVG export is usually the cleanest choice for a slide deck because it scales better than a raster image.

A custom vector command

Try \newcommand{\vect}[1]{\mathbf{#1}} \vect{u} + \vect{v}. The page detects the custom command from the snippet itself, so \vect should appear in the macro counts without being treated as undefined. That makes the editor useful for short snippets that rely on your own shorthand.

A broken environment

Enter \begin{align} a &= b + c without the closing line. The warning area should report a mismatched environment, and the preview may fail or stay incomplete. That is the kind of problem the structural checks are meant to surface before you export the result or paste it into a larger draft.

FAQ:

Does this handle complete LaTeX documents?

No. It focuses on math snippets and related exports. Full document compilation, bibliography management, and broad package handling are outside the scope here.

Why can the preview fail even though the text box accepts the snippet?

Text entry is broad, but rendering still depends on valid math structure and recognized commands. Missing braces, unfinished environments, or unsupported macros can stop the conversion.

Which export is safest for a sharp formula image?

SVG is usually the best first choice when sharp scaling matters. PDF here is a page wrapper around a rasterized preview, so it is less useful for truly scale-independent math graphics.

What is stored between visits?

Favorite snippets and recent snippets are stored in this browser profile. The current expression and display mode can also appear in the page URL when they differ from the defaults.

Should I expect AsciiMath to look exactly like the LaTeX source?

No. It is a different notation system. The goal is portability as plain text, not a character-for-character rewrite of the original LaTeX snippet.

Glossary:

Display math: An equation layout that stands on its own line with wider spacing.
Inline math: An equation layout meant to sit inside running text.
Macro: A backslash command such as \frac or a user-defined shortcut created with \newcommand.
MathML: A markup language for mathematical notation that preserves structure as well as appearance.
AsciiMath: A plain-text math notation that uses ordinary keyboard characters to express mathematical content.

References:

LaTeX Project documentation index, LaTeX Project.
User's Guide for the amsmath Package, American Mathematical Society.
MathML Core, W3C.
AsciiMath, AsciiMath.