Online Python Compiler: Run Python Code
This online python compiler runs real Python 3 inside your browser, so you can try code without installing anything. Type or paste a script, press Run, and see the output and any error message below. It is great for learning, homework, quick calculations and testing a snippet. The first run downloads the Python engine, about 10 MB, and after that runs start quickly. Your code stays on your device. Programs that need files, sockets or extra downloads will not work.
Online Python Compiler
Write and run Python 3 code in your browser. No install, no sign up.
How to use the Online Python Compiler
- Type or paste your Python code into the editor.
- Press Run code, or use Ctrl+Enter. The first run loads Python, which takes a few seconds.
- Read the output or error below. Add lines in the input box if your code calls input().
- Use Stop if a loop never ends, and Download .py to save your script.
Features
- Real Python 3 in the browser
- Output and error messages
- Input box for input()
- Stop button for endless loops
- Download or copy your code
- Code never leaves your device
Frequently asked questions
Is this a real Python compiler?
Yes. It runs real Python 3 using Pyodide, a version of Python compiled for the browser. Most of the standard library works.
Why is the first run slow?
The Python engine, about 10 MB, downloads the first time. After that it is cached by your browser and runs start faster.
How do I use input() in my program?
Open the input box and type one line for each time your code calls input(). The lines are given to your program in order.
Can I install packages like numpy or pandas?
This tool runs the standard library only. Packages that need extra downloads or network access are not available here.
What if my program never stops?
Press Stop. It ends the Python worker right away and a fresh one loads on the next run.