LaTeX Formula Editor (KaTeX)
Write maths with LaTeX and watch it render live.
Runs 100% in your browser. Your files are not uploaded to any server.
How to use LaTeX Formula Editor (KaTeX)
- Type or paste LaTeX in the box, or tap one of the examples.
- Check the live preview; tick Display mode for a centred formula.
- Copy the LaTeX or the MathML for your document.
Frequently asked questions
What is KaTeX?
KaTeX is an open-source (MIT) library that renders LaTeX maths quickly in the browser. Many websites and wikis use it.
Can I paste the formula into Word?
Copy the MathML and paste it into a tool that accepts MathML. Or copy the LaTeX into an editor that supports it, such as Overleaf or many note apps.
Is anything uploaded?
No. The formula is rendered in your browser.
Is LaTeX Formula Editor (KaTeX) free?
Yes. LaTeX Formula Editor (KaTeX) is free to use with no sign-up and no watermark.
Are my files uploaded to your server?
No. All processing happens locally in your browser using JavaScript and WebAssembly. Your files never leave your device, which also makes it fast and private.
Does it work on my phone?
Yes. It works in any modern browser on Windows, Mac, Linux, Android and iPhone. Very large files may be slow on older phones.