01 / INSTANT RUNTIME
No setup. Just run.
A full compiler in your browser. Pick a language, type, hit Run — output streams back in milliseconds.
Learn moreNEWPython 3.13, Node 24 and Java 21 runtimes are live — try them in the compiler.
[ ONLINE COMPILER — 80+ LANGUAGES ]
Code runs here. No setup.
CodeLab is the fast, editorial-grade playground for writing, compiling and running code in your browser. Built for learners, interview prep, and teams that share repros daily.
Python
Open full compiler Code Lab Compiler
Ready to compile
Built for classrooms, bootcamps & interviews
StudentsTeachersInterview prepStudy groupsDev teams
What is CodeLab?
CodeLab is a free online compiler. It is a static web page that embeds a full code editor and runtime for 80+ languages — you write code and run it without installing anything.
Who is it for?
Students learning their first language, candidates practicing interviews, teachers running live demos, and teams sharing quick reproductions. See use cases.
Is it free?
Yes — the Playground is free with no account. Optional Pro and Classroom plans add privacy, larger limits and teaching tools. See pricing.
[ WHY CODELAB ]
An editor that reads like a journal, runs like a tool.
02 / 80+ LANGUAGES
One tab for every stack
Python to Rust to Java. Switch runtimes without losing code, stdin, or history.
Learn more03 / SHAREABLE
Share code in one click
Every run gets a link. Send snippets, repros, and assignments that open exactly where you left off.
Learn more04 / BUILT FOR SHARING
Paste. Run. Send the link.
stdin, args and files travel with the URL. No screenshots, no “works on my machine”.
Try a sample run80+ languages, one shortcut away
All languages[ PRICING ]
Free to start. Fair when you grow.
Playground
Trying ideas fast.
$0
Pro
Living in the editor.
$8/mo
Classroom
Teachers & teams.
Custom
05 / START IN 10 SECONDS