Online Python Compiler

Use the Online Python Compiler to run and test Python instantly from any device — a phone, a Chromebook, or a locked-down work laptop where you can't install software. Pick the Python version you need (3.13, 3.12, or 3.11), press Run, and your code executes in seconds with full output and tracebacks.

Unlike most online compilers, everything runs 100% in your own browser via WebAssembly — your code is never uploaded to a server, so it stays completely private. You can even pip-install real packages like numpy, pandas, and requests, and share a runnable link to your snippet.

The Online Python Compiler runs real CPython directly in your browser using WebAssembly (Pyodide) — there is no server executing your code. That gives you two things most online compilers can't: complete privacy (your source never leaves your device) and no artificial time limit, because it runs on your own machine's CPU. Paste your code, press Run, and you get the same output and tracebacks you'd see from running python your_script.py locally.

You can choose the exact Python version — 3.13, 3.12, or 3.11 — from the dropdown. Each version loads the matching CPython build on demand, so you can confirm how your code behaves on a specific interpreter (useful when a feature, syntax, or library only works on certain versions). Modern language features — f-strings, match statements, type hints, dataclasses, comprehensions, async/await — all work exactly as they do in native Python.

It supports real pip installs through micropip: type packages like numpy, pandas, requests, sympy, or scikit-learn into the packages box and they're fetched from PyPI and loaded before your code runs. The full Python standard library (json, re, math, itertools, collections, datetime, and more) is available with no install at all.

Because it runs client-side in a WebAssembly sandbox, it can't touch your files or operating system, so it's safe to paste and run code you're still reasoning about. The trade-offs versus a native environment: packages need a WebAssembly-compatible build (most pure-Python and scientific packages have one), there's no subprocess or true multithreading, and network access goes through the browser rather than raw sockets.

This compiler is built to fit a real workflow, not just serve as a scratchpad. Write and test your script here, then continue through the Pyobfuscate suite in one click: format it to PEP 8, lint it with Ruff, type-check it with mypy, protect it with the AST obfuscator so it can't be copied, or package it into a standalone executable. The 'Obfuscate this code' button sends your tested script straight to the obfuscator.