Which Python version is used?

Python 3, via Pyodide. The standard library, including math, json, re, datetime and collections, is available.

How do I use input()?

Type one value per line in the input box. Each call to input() reads the next line.

No. Your code runs entirely in your browser. Only the Python runtime is downloaded from a public CDN (jsDelivr) on first use.

Run Python 3 code online in your browser. Standard library, input() support and instant output. Free, no sign-up, nothing uploaded.

Ctrl/⌘ + Enter to run

main.py

No output yet. Press Run to see results here.

Python

Code runs locally in your browser; it is not uploaded.

Tool page updated: 2026-10-22