JavaScript Playground

Run JavaScript code online in your browser. Write and execute JS with console output capture. No setup, no server — code runs directly in your browser sandbox.

Your data never leaves your browser

JavaScript Formatter & Beautifier

Format and beautify JavaScript with Prettier

Regex Tester & Debugger

Test regex patterns with live match highlighting

JSON Formatter & Beautifier

Format and validate JSON with syntax highlighting online

Frequently Asked Questions

Is the JavaScript sandbox safe?

The code runs in your browser's JavaScript engine. It has access to browser APIs but runs in an isolated context. Avoid running untrusted code.