# pyodide/pyodide

Pyodide is a Python distribution for the browser and Node.js based on WebAssembly

Repository: https://github.com/pyodide/pyodide
Canonical: https://ross.abutalabs.com/products/pyodide
Homepage: https://pyodide.org/en/stable/
Language: Python
License: MPL-2.0
License Family: copyleft
Topics: python, webassembly, wasm, emscripten, pyodide
Last push: 2026-08-26T08:34:40+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 3113, "days_push": 7, "days_rel": 8, "gap_med": 20, "n_releases_24m": 26}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 14802, forks 1043 (observed 2026-08-28T04:11:07.721581+00:00)

## What it is
Pyodide is a port of CPython to WebAssembly/Emscripten, distributed for the browser and Node.js. It lets you run Python, including packages like NumPy, pandas, and scikit-learn, directly in JavaScript environments with a full JavaScript-Python foreign function interface.

## Use cases
- run python in the browser
- execute pandas and numpy client-side without a server
- embed a python interpreter in a node.js app
- build a client-side python REPL web page
- run python notebooks entirely in the browser
- port a python data tool to webassembly
- call python code from javascript

## When to choose
- you need to run Python code or scientific packages client-side without a backend
- you want a browser-based Python REPL or educational tool
- you want to reuse existing Python libraries inside a JavaScript application
- you need offline or serverless Python execution in the browser

## When to avoid
- you need native performance or full CPython compatibility with all C extensions
- your Python code requires unrestricted file system or network access
- you only need Python on a server, where a normal CPython install is simpler
- bundle size and startup download time are critical constraints

## Facets
- artifact type: library
- maturity: active
- function: interpreter, programming-language, wasm, package-manager, sdk
- domain: programming-languages, web-development, data-science, cross-platform
- platform: browser, wasm
- tags: cpython, emscripten, micropip, scientific-computing, javascript-interop, in-browser-python, nodejs, web-server

## Member repositories
- pyodide/pyodide (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:07.721581+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:07:09.131380+00:00, confidence not recorded.
  - readme: https://github.com/pyodide/pyodide (fetched 2026-08-28T04:11:07.721581+00:00, sha 28e35b7c0b25)
  - homepage: https://pyodide.org/en/stable/ (fetched 2026-08-29T08:05:11.510041+00:00, sha ba8f6f7ff31e)
  - site_page: https://pyodide.org/en/stable/usage/quickstart.html (fetched 2026-08-29T08:05:11.520077+00:00, sha 0a5380c993d0)
  - site_page: https://pyodide.org/en/stable/project/about.html (fetched 2026-08-29T08:05:11.525686+00:00, sha 22d8df331643)
  - registry_pypi: https://pypi.org/pypi/pyodide/json (fetched 2026-08-29T08:05:11.532861+00:00, sha d56e9efe2e09)
  - site_page: https://pyodide.org/en/stable/usage/faq.html (fetched 2026-08-29T08:05:11.523290+00:00, sha dcf83827cb54)
  - site_page: https://pyodide.org/en/stable/project/changelog.html (fetched 2026-08-29T08:05:11.527929+00:00, sha f55a5937ecd5)
- Data as of 2026-08-30T08:39:29.467469+00:00.