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@jupyter-kit

Run Python in the browser

Your code never leaves the browser. Execution happens entirely inside a Web Worker in this page. No network request carries your cell source. The Pyodide runtime itself (about 10 MB compressed) is fetched once from the jsDelivr CDN, then cached — nothing else is sent.

Edit any cell below, then press Shift+Enter (or click the ▶ toolbar button) to run:

What’s running

  • @jupyter-kit/executor-pyodide boots a dedicated Web Worker.
  • The worker loads Pyodide from https://cdn.jsdelivr.net/pyodide/v0.26.2/full/.
  • Cell source is postMessage’d to the worker, evaluated, and the result / stdout / stderr / MIME bundle stream back.
  • autoloadImports: true scans import statements and installs packages via loadPackage before the cell runs (if the package is in Pyodide’s registry).

Setup

Terminal window
pnpm add @jupyter-kit/executor-pyodide @jupyter-kit/editor-codemirror
import { createPyodideExecutor } from '@jupyter-kit/executor-pyodide';
import { createEditorPlugin } from '@jupyter-kit/editor-codemirror';


const executor = createPyodideExecutor({ autoloadImports: true });
const plugins = [createEditorPlugin({ extensions: [pythonEditor()] })];


<Notebook executor={executor} plugins={plugins} ... />

To pin a specific Pyodide version or host it yourself, pass src and indexURL:

createPyodideExecutor({
  src: '/static/pyodide/pyodide.js',
  indexURL: '/static/pyodide/',
});