JavaScript Playground
Run JavaScript in your browser and see output, errors and timing instantly. Supports console methods, async code and DOM access — nothing is uploaded.
Runs in your browser
Real-time
JavaScript
Ctrl / ⌘ + Enter
Console
About this tool
Run JavaScript in your browser and see output, errors and timing instantly. Supports console methods, async code and DOM access — nothing is uploaded.
How to use
- Fill in the input box above, or click "Fill sample" to try it instantly
- Adjust the options as needed — results update as you type
- Click "Run" to get the result, then copy or export it in one click
Tips
- Runs entirely in your browser — your data never leaves the device
- Completely free, no registration, no usage limits
- Most tools compute in real time as you type