Run Python without the setup
Skip the PATH errors, the virtualenv and the one-gigabyte IDE. Open the app, paste the script, press run.
Why do it in Python Code Runner?
A fast, private desktop toolkit — not another website that uploads your files.
Straight to running code
No environment to activate and no project to create before the first line executes.
Live output and stdin
Output streams as the script runs, and interactive scripts that call input() actually work instead of hanging.
A real editor, not a box
Syntax highlighting, Jedi-powered autocomplete, find and replace with regex, and an execution history.
How to run Python without installing it
4 steps, entirely on your PC.
Download Python Code Runner free from mes-dev.com.
Open it and paste or write your script.
Press run — output streams live in the panel below.
Use the history to get back to anything you ran earlier.
Frequently asked questions
Can it run scripts that ask for input?
Yes. stdin is supported, so a script using input() prompts you in the output panel instead of hanging silently.
Is this a replacement for a full IDE?
For learning, scripting and quick automation, yes. For a large multi-file application with step debugging and cross-module refactoring, a full IDE is still the right tool.
What does the free tier include?
The editor and runner — highlighting, live error checking, autocomplete, streaming output, stdin, find and replace, and execution history. Tabs, snippets, the package manager, the scheduler and the AI helpers are premium.
Does it work offline?
Yes. Writing and running code needs no connection at all.
Get Python Code Runner free
Write and run Python on Windows without setting up an environment — syntax highlighting, autocomplete and live output in one small offline app.
Download Python Code Runner