JavaScript Minifier & Beautifier

Minify JavaScript to shrink file size or beautify compressed code to read it again. Paste your code, compare before-and-after sizes with the percentage saved, then copy or download the result - everything runs in your browser.

How to use

1. Paste your JavaScript into the input box.
2. Click Minify to compress it with Terser, or Beautify to format it readably.
3. Compare before/after sizes and the percentage saved.
4. Copy the output or download it as a .js file.

Tips

• Always keep an unminified original - debugging minified code is painful.
• Beautify is for reading third-party code you received compressed; do not ship beautified code to production.
• Check the saved percentage; if it is tiny, your code may already be optimized or mostly comments.
• Nothing is uploaded, so proprietary code stays private.