KaTeX math renderer for JupyterLab

Usage no npm install needed!

<script type="module">
  import jupyterlabKatexExtension from 'https://cdn.skypack.dev/@jupyterlab/katex-extension';



A JupyterLab extension for rendering KaTeX math.

The default LaTeX renderer in JupyterLab uses MathJax, which, while powerful, can be slow to render complex equations. This extension substitutes the MathJax renderer with the KaTeX renderer. KaTeX is much faster, at the cost of being less full-featured than MathJax. If you want faster math processing and the subset of LaTeX provided by KaTeX is sufficient for your purposes, this may be the extension for you!

If you equations are not rendering properly with this extension, you probably will want to fall back to MathJax.


  • JupyterLab >= 3.0


pip install jupyterlab-katex


Development install

Note: You will need NodeJS to build the extension package.

The jlpm command is JupyterLab's pinned version of yarn that is installed with JupyterLab. You may use yarn or npm in lieu of jlpm below.

# Clone the repo to your local environment
# Change directory to the jupyterlab-katex directory
# Install package in development mode
pip install -e .
# Link your development version of the extension with JupyterLab
jupyter labextension develop . --overwrite
# Rebuild extension Typescript source after making changes
jlpm run build

You can watch the source directory and run JupyterLab at the same time in different terminals to watch for changes in the extension's source and automatically rebuild the extension.

# Watch the source directory in one terminal, automatically rebuilding when needed
jlpm run watch
# Run JupyterLab in another terminal
jupyter lab

With the watch command running, every saved change will immediately be built locally and available in your running JupyterLab. Refresh JupyterLab to load the change in your browser (you may need to wait several seconds for the extension to be rebuilt).

By default, the jlpm run build command generates the source maps for this extension to make it easier to debug using the browser dev tools. To also generate source maps for the JupyterLab core extensions, you can run the following command:

jupyter lab build --minimize=False


pip uninstall jupyterlab-katex