Downloading and deploying Pyodide

Downloading Pyodide

CDN

Pyodide packages, including the pyodide.js file, are available from the JsDelivr CDN,

channel

indexURL

Comments

REPL

Latest release

https://cdn.jsdelivr.net/pyodide/v0.18.1/full/

Recommended, cached by the browser

link

Dev (main branch)

https://cdn.jsdelivr.net/pyodide/dev/full/

Re-deployed for each commit on main, no browser caching, should only be used for testing

link

To access a particular file, append the file name to indexURL. For instance, "${indexURL}pyodide.js" in the case of pyodide.js.

Warning

The previous CDN pyodide-cdn2.iodide.io is deprecated and should not be used.

Github releases

You can also download Pyodide packages from Github releases (pyodide-build-*.tar.bz2 file) serve them yourself, as explained in the following section.

=(serving_pyodide_packages)

Serving Pyodide packages

If you built your Pyodide distribution or downloaded the release tarball you need to serve Pyodide files with appropriate headers.

Serving locally

With Python 3.7.5+ you can serve Pyodide files locally by starting

python -m http.server

from the Pyodide distribution folder.

Point your WebAssembly aware browser to http://localhost:8000/console.html and open your browser console to see the output from Python via Pyodide!

Remote deployments

Any solution that is able to host static files and correctly sets WASM MIME type, and CORS headers would work. For instance, you can use Github Pages or similar services.

For additional suggestions for optimizing size and load times, see the Emscripten documentation about deployments.