# [](https://khan.github.io/KaTeX/) [](https://travis-ci.org/Khan/KaTeX)
KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web.
* **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](http://jsperf.com/katex-vs-mathjax/).
* **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 supports all major browsers, including Chrome, Safari, Firefox, Opera, and IE 8 - IE 11.
## Usage
Download the built files from [the releases page](https://github.com/khan/katex/releases). Include the `katex.min.js` and `katex.min.css` files on your page:
```html
```
Call `katex.render` with a TeX expression and a DOM element to render into:
```js
katex.render("c = \\pm\\sqrt{a^2 + b^2}", element);
```
To generate HTML on the server, you can use `katex.renderToString`:
```js
var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}");
// '...'
```
Make sure to include the CSS and font files, but there is no need to include the JavaScript.
These APIs default to inline math typesetting; for display math you can prepend `\displaystyle` ([#66](https://github.com/Khan/KaTeX/issues/66)):
```js
katex.render("\\displaystyle " + formula, element);
// OR
var html = katex.renderToString("\\displaystyle " + formula);
```
## Contributing
See [CONTRIBUTING.md](CONTRIBUTING.md)
## License
KaTeX is licensed under the [MIT License](http://opensource.org/licenses/MIT).
](https://khan.github.io/KaTeX/) [](https://travis-ci.org/Khan/KaTeX)
KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web.
* **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](http://jsperf.com/katex-vs-mathjax/).
* **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 supports all major browsers, including Chrome, Safari, Firefox, Opera, and IE 8 - IE 11.
## Usage
Download the built files from [the releases page](https://github.com/khan/katex/releases). Include the `katex.min.js` and `katex.min.css` files on your page:
```html
```
Call `katex.render` with a TeX expression and a DOM element to render into:
```js
katex.render("c = \\pm\\sqrt{a^2 + b^2}", element);
```
To generate HTML on the server, you can use `katex.renderToString`:
```js
var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}");
// '...'
```
Make sure to include the CSS and font files, but there is no need to include the JavaScript.
These APIs default to inline math typesetting; for display math you can prepend `\displaystyle` ([#66](https://github.com/Khan/KaTeX/issues/66)):
```js
katex.render("\\displaystyle " + formula, element);
// OR
var html = katex.renderToString("\\displaystyle " + formula);
```
## Contributing
See [CONTRIBUTING.md](CONTRIBUTING.md)
## License
KaTeX is licensed under the [MIT License](http://opensource.org/licenses/MIT).