---
id: jupyterlite-pyodide-kernel
version: "0.8.3"
license: BSD-3-Clause
license_treatment: permissive
maintenance: active
---

# jupyterlite-pyodide-kernel — Python kernel for JupyterLite powered by Pyodide

License: permissive · Maintenance: active · Downloads: 161.4K/mo

## What it is and what it does

jupyterlite-pyodide-kernel is a JupyterLite extension that adds a Python kernel powered by Pyodide, allowing Python code to run directly in the browser as WebAssembly. It integrates with the JupyterLite build system via CLI addons and labextension assets, enabling interactive notebooks without a backend server.

The kernel depends on jupyterlite-core and pkginfo. It supports configuring the Pyodide distribution, managing runtime-installable wheels via %pip, and customizing the Pyodide lockfile for automatic package imports. Optional features like the [lock] extra provide tools for managing local or PyPI packages and their dependencies in the lockfile.

Use it for:

- Build a shareable, serverless Jupyter notebook that runs entirely in the browser for teaching or demos.
- Create offline-capable interactive documentation or tutorials that require no backend infrastructure.
- Develop and test Python code in a lightweight, browser-based environment without setting up a Jupyter server.
- Customize the Pyodide environment by adding local wheels or PyPI packages to the lockfile for specific use cases.
- Deploy interactive notebooks to static hosting (GitHub Pages, Netlify) with full Python execution capability.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Provides a Python kernel for JupyterLite that runs Python code in the browser via Pyodide, enabling interactive notebooks without a server.

Yes. The package is actively maintained, has low install friction, carries a permissive license, and solves a real problem—running Python in the browser without a server. It integrates cleanly into JupyterLite's build system and supports current Python versions. Install it if you need to build serverless Jupyter notebooks or interactive browser-based Python environments.

## Install

pip install jupyterlite-pyodide-kernel
uv add jupyterlite-pyodide-kernel
poetry add jupyterlite-pyodide-kernel

## Installing jupyterlite-pyodide-kernel

Before you install: Low install friction with a pure-Python wheel. Actively maintained with a release 3 days old and recent commits. Supports current Python versions (3.10–3.14).

License in practice: BSD-3-Clause is permissive; you may use, modify, and distribute this package with minimal restrictions, provided you retain the license notice.

Quickstart:

pip install jupyterlite-pyodide-kernel
jupyter lite build

Requires jupyterlite-core and a JupyterLite site structure to build; the kernel integrates as a labextension and CLI addon, not a standalone library.

Verify before relying:

- Whether the optional [lock] extra (pyodide-lock, uv) is necessary for typical workflows or only for advanced package management.
- Performance characteristics and browser compatibility across different environments.
- Whether pre-built Pyodide wheels cover the packages you need or if custom wheel management is required.

## Package facts

- License: BSD-3-Clause (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 161.4K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

jupyter browser kernel pyodide, jupyterlite python kernel, run python in browser notebook, serverless jupyter environment, wasm python kernel, jupyterlite pyodide, browser-based jupyter, jupyter-extension, wasm, browser-python

[View on SkillFed](https://skillfed.io/packages/jupyterlite-pyodide-kernel) · [View on PyPI](https://pypi.org/project/jupyterlite-pyodide-kernel/)