Math Equation Editor

How do I create and render a math equation online?

Open the Math Equation Editor, type LaTeX math (or click symbols and templates from the palette) and it renders live with KaTeX in a display-mode preview. Then copy the LaTeX, copy the MathML, or download the equation as a PNG or vector SVG. Everything runs in your browser — nothing is uploaded.

Type LaTeX math and see it render instantly with KaTeX
Click a categorized symbol & template palette to insert LaTeX at the cursor
Load common equations (quadratic, Euler’s identity, integrals, matrices) in one click
Toggle display vs inline mode and adjust the preview size
Copy LaTeX, copy MathML, or download PNG and SVG — 100% client-side

What is

A math equation editor is a tool that converts LaTeX math syntax into a typeset equation. This editor renders LaTeX with KaTeX (HTML + MathML) live as you type, provides a symbol/template palette that inserts LaTeX at the cursor, and exports the result as LaTeX, MathML, PNG, or SVG.

Math & Typesetting

Related terms

LaTeXKaTeXMathMLEquation to ImageLaTeX to PNG

Frequently Asked Questions

Open the Math Equation Editor and type LaTeX math syntax — fractions are \frac{numerator}{denominator}, superscripts use ^, subscripts use _, and there are commands like \sqrt, \sum, \int, and Greek letters such as \alpha. The equation renders live with KaTeX as you type. If you do not remember a command, click it in the categorized symbol and template palette (Greek, operators, relations, arrows, fractions, roots, integrals, matrices, accents) and the LaTeX is inserted at the cursor; templates like fractions drop the caret inside the first group so you can keep typing. It all runs in your browser.

Type LaTeX math like \frac{a}{b} or x^2 into the editor and it renders live with KaTeX, or click symbols from the palette to insert the LaTeX for you.

In the Math Equation Editor, enter your LaTeX so it renders in the live preview, then use the export buttons. Download SVG produces a crisp vector file (the KaTeX HTML wrapped in a foreignObject with the math fonts inlined, so it stays sharp at any size and opens anywhere). Download PNG produces a high-resolution raster image of the rendered equation. Both are generated entirely on your device — the equation is never uploaded to a server.

Type or paste the LaTeX, then click Download PNG or Download SVG. The PNG is a high-resolution raster and the SVG is true vector with fonts inlined.

KaTeX renders each equation as HTML for display plus MathML for accessibility. The Math Equation Editor pulls the MathML <math> island out of that render and copies it to your clipboard when you click Copy MathML, with the standard MathML namespace added. You can paste it into Microsoft Word, accessible documents, or any MathML-aware application. The conversion happens entirely in your browser.

Yes — click Copy MathML. KaTeX renders MathML alongside the visual HTML, and the editor extracts that <math> markup for you to paste anywhere.

The editor uses KaTeX, a fast and well-supported subset of LaTeX math. It covers the vast majority of everyday math typesetting: fractions, roots, exponents and subscripts, big operators (sums, products, integrals, limits), matrices and cases, Greek letters, accents, arrows and hundreds of relations and symbols. Some rare commands and full LaTeX document packages — TikZ diagrams, custom .cls/.sty styles, arbitrary macros — are outside KaTeX’s scope. When you type something unsupported, the editor shows KaTeX’s own error message in red and keeps working so you can correct it.

It supports a large subset of LaTeX math via KaTeX — fractions, roots, sums, integrals, matrices, Greek, accents and hundreds of symbols — but not full packages like TikZ.

Detailed Explanation

How It Works

A Live LaTeX Math Editor Powered by KaTeX

The Math Equation Editor renders LaTeX math syntax to typeset equations live with KaTeX — the fastest math typesetting library for the web — entirely in the browser. As the user types, KaTeX produces HTML for visual display plus MathML for accessibility, and the preview re-renders on every keystroke in either display mode (centered, large operators) or inline mode (compact). Because KaTeX runs locally and renders synchronously without reflow, there is no server round-trip and no network call; the equation never leaves the device.

LaTeX math rendered live with KaTeX (HTML + MathML) on every keystroke
Display mode and inline mode, with an adjustable preview font size
Runs entirely client-side — no server, no CDN, no upload
KaTeX renders synchronously and is bundled from this origin

Use Cases

Symbol Palette, Templates, and a Common-Equations Library

A categorized palette groups hundreds of LaTeX tokens — Greek letters, operators, relations, arrows, structures (fractions, roots, sums, integrals, limits, binomials, vectors), accents, and environments (matrices, cases, aligned) — and each button inserts its LaTeX at the textarea caret. Insertion is caret-aware: the tool tracks the selection, splices the snippet in, and restores focus and cursor position; template snippets carry a caret marker so a fraction or matrix drops the cursor inside the first group ready for input. A one-click library loads common equations such as the quadratic formula, Euler’s identity, the Gaussian integral, the Basel problem, a matrix product, and piecewise cases.

Palette grouped by Greek, operators, relations, arrows, structures, accents, environments
Buttons insert LaTeX at the cursor; templates place the caret inside the first group
Each palette button shows the rendered symbol, not just its command
One-click common-equations library (quadratic, Euler, Gaussian, matrices, cases)

Technical Details

Exporting to LaTeX, MathML, PNG, and SVG

The editor exports the equation four ways, all generated locally. Copy LaTeX puts the raw source on the clipboard. Copy MathML extracts the <math> island from KaTeX’s htmlAndMathml render (with the standard MathML namespace added) for pasting into Word or accessible documents. Download SVG builds a self-contained vector file — the KaTeX HTML inside a foreignObject with the KaTeX web fonts inlined as base64 data-URIs so glyphs survive rasterization — which stays crisp at any size. Download PNG produces a high-resolution raster: by default it rasterizes the inlined-font SVG via canvas, falling back to html2canvas over the on-screen render.

Copy raw LaTeX source or accessible MathML to the clipboard
Vector SVG with KaTeX fonts inlined (sharp at any size, opens anywhere)
High-resolution PNG rasterized locally from the rendered equation
Every export runs in the browser; the equation is never uploaded

Limitations

Supported LaTeX Subset and Honest Limitations

KaTeX implements a large, well-supported subset of LaTeX math: fractions, roots, exponents and subscripts, big operators (sums, products, integrals, limits), matrices and cases, Greek letters, accents, arrows, and hundreds of relations and symbols. It is not a full TeX compiler — rare commands and document packages such as TikZ diagrams, custom .cls/.sty styles, and arbitrary macros fall outside its scope. The editor handles this gracefully: invalid input is shown in red with KaTeX’s own parse-error message pointing at the problem, and the editor stays usable so the expression can be corrected rather than failing silently.

Covers the vast majority of everyday math typesetting via KaTeX
Not a full LaTeX/TeX compiler — no TikZ, custom packages, or arbitrary macros
Invalid LaTeX shown in red with KaTeX’s precise error message
Honest, standards-based caveat rather than a hidden failure

Math equation editing: in-browser (AnyTool) vs typical online LaTeX editors
Capability	AnyTool	Typical online editors
Processing	Renders in your browser with KaTeX	Often server-side rendering or ad-heavy
Live preview	Re-renders on every keystroke	Sometimes click-to-render
Symbol palette	Categorized, caret-aware insertion	Limited or flat list
Equation library	One-click common equations	Rarely included
MathML export	Copy accessible MathML	Usually not offered
Image export	Vector SVG + high-res PNG	PNG only, often watermarked
Error handling	Red inline KaTeX message	Blank output or vague error
Privacy	Never uploaded, works offline	May transmit or log your input
Cost / signup	Free, no signup	Often gated or rate-limited

AnyTool renders and exports the equation locally and uploads nothing you type.

Cite This Page

Title: Math Equation Editor (live KaTeX LaTeX rendering, categorized symbol & template palette, common-equations library, LaTeX / MathML / PNG / SVG export, 100% client-side)
Author: AnyTool
Published: January 1, 2026
Modified: February 8, 2026
Section: Generators
URL: https://www.anytool.tech/math-equation-editor

Formatted Citation

AnyTool. "Math Equation Editor (live KaTeX LaTeX rendering, categorized symbol & template palette, common-equations library, LaTeX / MathML / PNG / SVG export, 100% client-side)." AnyTool, January 1, 2026. https://www.anytool.tech/math-equation-editor

A privacy-first, 100% client-side math equation editor that renders LaTeX math syntax to typeset equations entirely in the browser with KaTeX — the fastest math typesetting library for the web — with no server call, no CDN and no upload, so the typed LaTeX and every export never leave the device and the tool works offline once cached. As the user types into a textarea, KaTeX produces HTML for the visual display plus MathML for accessibility and the live preview re-renders on every keystroke in either display mode (centered with large operators) or inline mode (compact), at an adjustable preview font size; because KaTeX renders synchronously without reflow there is no flicker and no network round-trip. A categorized symbol and template palette groups hundreds of LaTeX tokens — Greek letters, operators, relations, arrows, structures (fractions, roots, superscripts, subscripts, sums, products, integrals, contour integrals, limits, binomials, vectors), accents, and environments (matrix, bmatrix, vmatrix determinant, cases, aligned, auto-sized brackets) — and each button, which itself shows the rendered glyph rather than just the command, inserts its LaTeX at the current caret. Insertion is caret-aware: the editor reads the textarea selectionStart and selectionEnd, splices the snippet between them, then restores focus and the cursor position, and template snippets carry a caret marker so a fraction, root or matrix drops the cursor inside the first group ready for the next keystroke. A one-click library loads common equations including the quadratic formula, Euler’s identity, the Gaussian integral, the Basel problem, a matrix-vector product, a Maxwell curl equation and a piecewise cases definition. The equation exports four ways, all generated locally: Copy LaTeX places the raw source on the clipboard; Copy MathML extracts the <math> island from KaTeX’s htmlAndMathml output, adds the standard MathML namespace, and copies it for pasting into Microsoft Word, accessible documents or any MathML-aware application; Download SVG builds a self-contained vector file by wrapping the KaTeX HTML in an SVG foreignObject with the KaTeX layout CSS and every KaTeX web font inlined as a base64 data-URI — the classic foreignObject web-font gotcha that, unsolved, makes rasterized glyphs vanish — so the SVG stays crisp at any size and opens anywhere; and Download PNG produces a high-resolution raster, by default rasterizing that inlined-font SVG through a canvas and otherwise falling back to html2canvas over the on-screen render. The tool is explicit and honest that KaTeX implements a large, well-supported subset of LaTeX math rather than a full TeX compiler: it covers fractions, roots, exponents and subscripts, big operators, matrices and cases, Greek letters, accents, arrows and hundreds of relations and symbols, but rare commands and full document packages such as TikZ diagrams, custom .cls/.sty styles and arbitrary macros are out of scope, and when the input is invalid the editor shows KaTeX’s own parse-error message in red pointing at the problem while staying usable so the expression can be fixed rather than failing silently.