Python Editor (Run in Browser)
Write and run real Python in your browser — no install, no server, no account. Powered by Pyodide, a full CPython build compiled to WebAssembly.
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Real Python, No Server Involved
This runs an actual CPython interpreter compiled to WebAssembly (Pyodide), loaded once into your browser and executed entirely on your device — your code never reaches this site's server. The first run downloads the Python runtime (~12 MB, cached by your browser afterward), which takes a few seconds; every run after that starts instantly.
The full Python standard library is available (math, json, re, datetime, and more) — this is genuine Python, not a simulated subset.
Frequently Asked Questions
Why does the first run take a few seconds?
Your browser downloads and initializes the WebAssembly Python runtime the first time — after that it's cached, and subsequent visits (and subsequent runs on the same page) start immediately.
Can I install packages like numpy or requests?
This tool runs the standard library only. Pyodide does support installing pure-Python packages via micropip, but that adds another download step and is outside the scope of this lightweight tool — for that, use Pyodide's own console directly.
Does my code run on your server?
No — nothing is uploaded anywhere. The Python interpreter runs as WebAssembly inside your own browser tab, the same way any other JavaScript on this page does.
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Python Editor (Run in Browser)