- Fast: KaTeX renders its math synchronously and doesn't need to reflow the page. See how it compares to a competitor in this speed test.
- Print quality: KaTeX's layout is based on Donald Knuth's TeX, the gold standard for math typesetting.
- Self contained: KaTeX has no dependencies and can easily be bundled with your website resources.
- Server side rendering: KaTeX produces the same output regardless of browser or environment, so you can pre-render expressions using Node.js and send them as plain HTML.
KaTeX is compatible with all major browsers, including Chrome, Safari, Firefox, Opera, Edge, and IE 9–11.
KaTeX supports much (but not all) of LaTeX and many LaTeX packages. See the list of supported functions.
Try out KaTeX on the demo page!
<!-- KaTeX requires the use of the HTML5 doctype. Without it, KaTeX may not render properly --><!-- The loading of KaTeX is deferred to speed up page rendering --><!-- To automatically render math in text elements, include the auto-render extension: -->...
You can also download KaTeX and host it yourself.
For details on how to configure auto-render extension, refer to the documentation.
katex.render to render a TeX expression directly into a DOM element.
katex.renderToString to generate an HTML string of the rendered math,
e.g., for server-side rendering. For example:
var html = katex;// '<span class="katex">...</span>'
The examples above use the
throwOnError: false option, which renders invalid
inputs as the TeX source code in red (by default), with the error message as
hover text. For other available options, see the
options documentation, and
handling errors documentation.
Demo and Documentation
Learn more about using KaTeX on the website!
KaTeX is licensed under the MIT License.