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JavaScript & CSS Minifier Tool

Minify your code to improve website performance

JavaScript Minifier
CSS Minifier

JavaScript Code

Compression Options

Format Options

Minified Output

0 B
Original Size
0 B
Compressed Size
0%
Size Reduction
Minified code will appear here...

Frequently asked questions!

  • What is a JS & CSS minifier?

    A minifier removes unnecessary characters (whitespace, comments, shortens names where safe) from JavaScript or CSS to reduce file size and speed up page load times.

  • What’s the difference between minifying and uglifying?

    “Minifying” mainly removes whitespace and comments. “Uglifying” can also rename variables, perform scope-aware transformations and advanced optimizations. Uglifiers (like Terser) are more aggressive and intended for production build steps..

  • Which languages and features does the tool support?

    This client-side tool supports standard JavaScript and CSS. It’s best for quick minification tasks. For modern JS features (ES6+), module bundling, or tree-shaking, use build tools like esbuild, webpack, or Rollup in your pipeline.

  • Will minifying my code break functionality?

    Simple minification (removing spaces/comments) is safe. Aggressive optimizations (variable renaming, dead-code removal) can break code if your script relies on names or globals. Always test after minifying, and keep a non-minified source for debugging.

  • Is client-side minification secure and private?

    Yes—if the minifier runs fully in the browser (client-side), your code never leaves your device. Server-side tools require upload and depend on the provider’s privacy policy.