01 / INSTANT RUNTIME
No setup. Just run.
A full compiler in your browser. Pick a language, type, hit Run — output streams back in milliseconds with stdin and args support.
[ FEATURES ]
An editor that reads like a journal, runs like a tool.
Dark canvas, oversized type, zero chrome. Everything that isn't code gets out of the way — so learners, candidates and teams can focus on the program in front of them.
02 / 80+ LANGUAGES
One tab for every stack
Python, JavaScript, Java, C++, Go, Rust and more. Switch runtimes without losing code, stdin, or history.
03 / SHAREABLE
Share code in one click
Every run gets a link. Send snippets, repros, and assignments that open exactly where you left off.
04 / CLASSROOM READY
Teach with live code
Rosters, assignments and run history on Classroom plans. Students start in one click — no installs, no version drift.
05 / INTERVIEW MODE
Signal, not setup
Clean prompt, timer-friendly layout and copy-paste controls. Focus on problem solving, not environment debugging.
06 / FAST BY DEFAULT
Priority queue on Pro
Larger timeouts, bigger file support and no ads. Your hot loop stays hot.
07 / BUILT FOR SHARING