See your JavaScript. Instantly.

Free playground with inline results. Write code and watch values appear next to each line as you type.

Open Playground

⚡Instant Inline Results

See the value of every expression right next to your code as you type. No need to console.log everything — results appear automatically after each statement.

Inline results example

📋Console Output Panel

All your console.log, console.error, and console.warn calls are captured in a dedicated panel. Keep your output organized and separate from inline values.

Console panel example

🎨Powered by Monaco

The same powerful editor that powers VS Code. Full syntax highlighting, intelligent autocomplete, keyboard shortcuts, and a familiar editing experience you already know.

Monaco editor example
🛡️

Safe Sandbox

Code runs in an isolated Web Worker with 3-second timeout. Infinite loops won't crash your browser.

💾

Auto-Save

Your code is automatically saved to local storage. Come back anytime and continue where you left off.

Share Code

Share your code with a single click. Every snippet gets a unique URL you can send to anyone.

🆓

Free

No sign-up, no payment, no limits. Just open and start coding right in your browser.