Code Playground

Run Python or JavaScript in your browser — no server, no signup, completely private.

🐍 Python 3.11 via Pyodide⚡ Browser JS engine🔒 100% local
EditorCtrl+Enter to run, Tab to indent
Output
Click Run to see output here.

All code runs locally in your browser — nothing is sent to any server.

Example Snippets

About the Playground

The Dev Tools ! Playground runs Python 3.11 in your browser using Pyodide, a WebAssembly port of CPython. JavaScript runs natively in the browser JS engine.

No code is ever sent to a server. Everything runs client-side — your code stays completely private.

Python 3.11

Full CPython via WebAssembly. Supports hashlib, json, re, base64, and more.

JavaScript

Native browser execution. Supports async/await, WebCrypto, btoa/atob, and all browser APIs.

Private by design

Zero telemetry on your code. Works offline after first load.