About this tool
Paste JavaScript or open a UTF-8 .js or .mjs file, then choose Format or Minify. JavaScript syntax is supported; TypeScript and JSX are not.
JavaScript is parsed and printed locally without running it. Names and expressions are preserved. Minify removes ordinary comments but keeps license and preservation comments.
UTF-8 text · up to 5 MiB · stays on this device
Editing the input or settings clears the previous result. Copy and download always use the latest completed conversion.
Your text and files stay on this device. Nothing is uploaded or saved by this tool.
Frequently asked questions
How do I use this tool?
Paste JavaScript or open a UTF-8 .js or .mjs file, then choose Format or Minify. JavaScript syntax is supported; TypeScript and JSX are not.
How does it handle my data?
JavaScript is parsed and printed locally without running it. Names and expressions are preserved. Minify removes ordinary comments but keeps license and preservation comments.
Can I use large files or work offline?
UTF-8 text · up to 5 MiB · stays on this device