Python Online Runner

What is Python Online Runner?

This tool uses Pyodide, a CPython build compiled to WebAssembly, to run Python directly in your browser. No local Python installation and no server involvement are required; your code executes entirely in your browser.

Key Features

1. Ready to go: write and run Python immediately. The first load downloads about 10MB of runtime which is then cached locally for fast startups.
2. Standard input: input() prompts inside the browser to simulate a command-line session.
3. Scientific libraries: numpy, pandas, matplotlib, requests and more can be loaded on demand.
4. Matplotlib charts: plotting is rendered directly on the page with Chinese font support.

How is this different from the server version?

We also provide a Python3 Online Compiler with Python 3.13 / 3.6 versions. The browser version is ideal for quick scripts, validation and teaching. Use the server version when you need a specific Python version.

Usage

1. Type or paste Python code in the editor.
2. Optionally load libraries such as numpy via the library button.
3. Click Run (or press Ctrl+Enter).
4. View the result in the output panel.