A lightweight offline Python editor for Windows
Everything you need to write and run a script, and nothing you do not. It opens in a second and works with no connection.
Why do it in Python Code Runner?
A fast, private desktop toolkit — not another website that uploads your files.
Light, not stripped
Syntax highlighting, live error checking and autocomplete, in an app that opens instantly rather than one that loads a workspace first.
Your code stays local
No cloud workspace, no sign-in and no telemetry on what you write — which matters when the script touches production data or client systems.
Tabs and snippets
Multiple tabs and a reusable snippet library for the boilerplate you write over and over.
How to offline Python editor for Windows
4 steps, entirely on your PC.
Download Python Code Runner free from mes-dev.com.
Open a new tab and start writing — highlighting and autocomplete are on by default.
Run the script and read the output in the panel below the editor.
Save anything you reuse into the snippet library.
Frequently asked questions
Does it work without an internet connection?
Yes, completely. There is no sign-in and no cloud workspace, so editing and running behave identically offline.
Which features are free?
The core editor and runner. Multiple tabs, the snippet library, the package manager, the script scheduler and the AI Fix, Enhance and Explain helpers are premium.
Can I open several files at once?
Multiple tabs are part of the premium tier; the free tier works on one script at a time.
Is it a one-time purchase?
Yes. Premium unlocks with a licence key bought once — there is no subscription and no expiry.
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