Free · No Login Required · Open Source
Run JavaScript
in Your Browser
A minimal, fast online editor for writing and running JS instantly. Auto-save, multiple themes, live output — no setup needed.
1// Write JS — output appears instantly
2const greet = (name) => {
3 console.log(`Hello, ${name}!`);
4};
5
6greet("World");
7// → Hello, World!
Features
Everything you need
to write better JS.
Live Execution
Code runs as you type. See console output update in real-time without hitting any button.
40+ Themes
Switch between Monokai, Dracula, Solarized, and many more editor themes to match your style.
Auto-Save
Your code is automatically saved locally. Come back anytime and pick up right where you left off.
Autocomplete
Intelligent suggestions and snippet support powered by the Ace editor engine.
Dark & Light Mode
Comfortable coding in any environment. Toggle between dark and light UI with one click.
Copy & Share
One-click copy your entire code to clipboard. Zero friction sharing with teammates.