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FreeFormatHub
🎨

CSS Minifier

Minify and compress CSS code by removing whitespace, comments, and optimizing properties for smaller file sizes.

Input

Output

Output will appear here

🚀 Performance Benefits

  • • Faster page loading times
  • • Reduced bandwidth usage
  • • Better mobile performance
  • • Improved SEO scores
  • • Lower hosting costs

💡 Minification Tips

  • • Use /*! for important comments
  • • Test thoroughly after minification
  • • Keep source files for editing
  • • Combine with gzip compression
  • • Minify during build process

How It Works

Privacy First

This css minifier processes your data entirely in your browser. No data is uploaded to any server, ensuring complete privacy and security.

Lightning Fast

Instant processing with real-time validation and error detection. No waiting, no delays - just immediate results.

Versatile Use Cases

  • Reduce CSS file size for faster website loading
  • Optimize stylesheets for production deployment
  • Compress CSS for email templates and newsletters

Mobile Friendly

Responsive design that works perfectly on all devices and screen sizes. Touch-friendly interface for mobile users.

Frequently Asked Questions

Will CSS minification break my styles?
No, minification only removes unnecessary characters and optimizes values while preserving functionality. The visual appearance of your styles remains exactly the same.
How much can I expect to reduce file size?
Typical reduction is 20-40% depending on your CSS structure. Highly commented or formatted CSS can see even greater reductions.
Are CSS variables and modern features supported?
Yes! The minifier preserves CSS custom properties (variables), calc() functions, CSS Grid, Flexbox, and other modern CSS features.
Should I minify CSS for development?
No, keep readable formatting during development. Minification is best applied during your build process or before production deployment.
Can I preserve certain comments in minified CSS?
Important comments (like copyright notices) starting with /*! are automatically preserved even when comment removal is enabled.