CSS Minifier

Compress CSS files by removing whitespace, comments, and optimizing selectors for faster loading.

⚙️ Minification Settings

Remove /* */ comments from CSS code

Remove unnecessary spaces, tabs, and line breaks

Remove CSS rules with no declarations

Merge duplicate selectors and optimize CSS structure

Convert #ffffff to #fff, rgb() to hex when shorter

Remove units from zero values (0px → 0)

Add text to the beginning of processed file names

Add text to the end of processed file names (before extension)

🎨 CSS Minification Tips

🚀 Best Practices

  • Remove comments: Reduces file size significantly
  • Whitespace removal: Can save 30-50% of file size
  • Color optimization: #ffffff → #fff saves bytes
  • Unit removal: 0px → 0 for cleaner code
  • Test thoroughly: Always test minified CSS in browsers

Privacy & Security

  • ✅ All processing happens in your browser
  • ✅ Code is never uploaded to our servers
  • ✅ Your CSS stays completely private
  • ✅ No registration or account required
  • ✅ Instant minification with no delays

The CSS minifier tool offers a range of settings to select various aspects of the minification process, with line of code to be optimized or removed. To top it up, the tool differentiates itself from other tools with its file processing option, where you can upload and minify up to 20 files per batch, dramatically reducing time of minifying multiple files.

Minifying CSS files can help webmasters in giving their website a speed boost, which is still an important factor in search engine optimization. This together with JS minification and HTML minification can improve Page Speed score by even 10 points.