Online Python Compiler
Write Python 3 and run it straight away. Standard library included, and the Input box below the editor is read by input() exactly as it would be in a terminal.
Running code needs a free account. Write and edit here as much as you like — pressing Run asks you to sign in. It is free, takes about a minute, and covers all five languages plus graded exercises.
Create free accountHow this Python compiler works
Python runs in a real CPython interpreter compiled to WebAssembly, sandboxed on our servers — so it behaves like Python on your machine, without you installing anything.
Frequently asked questions
Which Python version is this?
Python 3.12, with the standard library available. Third-party packages such as numpy or pandas are not installed.
How do I give my program input?
Open the Input box under the editor and type it there — each line is returned by a call to input(), in order.
Is this Python compiler really free?
Yes — free, with no card and no trial. It needs a free account, because running code costs real server time and an account is how we keep that fair for everyone. Signing up takes about a minute.
Do I need to install anything?
No. Everything runs on our servers and the results come back to your browser. Nothing to download, no setup, works on a phone.
Can I use this for interview practice?
Yes, and there are graded exercises with hidden test cases if you want feedback rather than just output — those need a free account.
Want feedback, not just output?
A free account unlocks graded exercises — you write a solution, it runs against hidden test cases, and you are told exactly which ones fail and why. Plus structured courses in Python and 17 other paths.
Create a free account