LaTeX Equation Editor
Free online LaTeX equation editor with real-time KaTeX preview. Write, edit, and export math formulas instantly.
What is a LaTeX equation editor?
A LaTeX equation editor is a tool that lets you write mathematical formulas using LaTeX syntax and see them rendered in real-time. It supports fractions, integrals, matrices, Greek letters, and more.
How do I write a fraction in LaTeX?
Use \frac{numerator}{denominator} syntax. For example, \frac{1}{2} renders as 1/2. You can also nest fractions like \frac{\frac{1}{2}}{3}.
Can I copy the rendered equation as an image?
Yes, click the "Copy as Image" button to copy the rendered equation to your clipboard as a PNG image, which you can paste into documents or presentations.
What is the difference between inline and display mode?
Inline mode renders equations within text flow (smaller), while display mode renders equations centered on their own line (larger). Toggle between them using the display mode switch.
Do I need to install LaTeX to use this editor?
No, this is a fully online editor powered by KaTeX. Everything runs in your browser, no installation or account required.
Can I export equations as images?
Yes, you can export any rendered equation as a PNG image or copy it directly to your clipboard for use in Word, Google Docs, or presentations.
Does the editor support matrices and systems of equations?
Yes, use the \begin{pmatrix} or \begin{cases} environments to create matrices, vectors, and piecewise functions.
Is this LaTeX editor free to use?
Yes, this LaTeX equation editor is completely free with no usage limits, no registration, and no watermarks on exported images.
Can I use this editor on mobile devices?
Yes, the editor is fully responsive and works on smartphones, tablets, and desktops with the same feature set.
How does KaTeX differ from MathJax?
KaTeX is significantly faster than MathJax because it renders synchronously without reflow. It supports most common LaTeX math commands, making it ideal for real-time editing.
Can I copy the LaTeX code instead of exporting an image?
Yes. Besides copying the formula as a PNG image, you can copy the raw LaTeX code or the MathML markup, and download the equation as an SVG file — a vector format that stays sharp at any zoom level.
Why does my formula show an error instead of rendering?
Usually a curly brace or a backslash is missing somewhere. The editor renders with KaTeX, which supports the common math commands but not every LaTeX package, so an unsupported command stops the preview.
I don't remember all the commands — how do I insert symbols?
Use the quick symbols panel: Greek letters, operators, arrows, relations and more are inserted with one click. There are also ready-made templates for fractions, square roots, integrals and matrices.
Are my formulas saved anywhere?
Recent formulas stay in your browser's local history so you can reopen them later. Everything remains on your device — nothing is uploaded, and you can clear the history at any time.
How to Use LaTeX Equation Editor
Write LaTeX math and see it rendered live with KaTeX. The editor runs entirely in your browser, and nothing you type is uploaded.
- Type a formula in LaTeX syntax — e.g. \frac{1}{2} — and the KaTeX preview updates as you type.
- Toggle 'Display mode' to render the equation centered on its own line instead of inline.
- Use the + and − buttons to adjust the preview's font size until it looks right.
- When you are done, copy or export the formula; 'Clear all' wipes the saved history.
If the preview shows an error, look for unescaped braces — write \{ to print a literal curly brace.
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