CSS Minifier Online Tool
Free online tool to minify css code to reduce file size. No registration required - secure, fast, and easy to use. Built with privacy in mind.
Minification Options
Strip all comments from CSS
Remove unnecessary spaces
Combine all lines into one
Convert font-weight names to numbers
Convert colors to shortest form
Compression Statistics
Statistics will appear after minification.
About CSS Minifier & Optimizer
This free online CSS minifier and optimizer tool helps you reduce CSS file size by removing unnecessary characters, comments, and whitespace. Essential for web performance optimization and faster page loading.
Key Features
- Advanced minification to remove comments, whitespace, and line breaks
- Color compression to convert hex colors to shortest form (#RRGGBB to #RGB)
- Font weight optimization with numeric value conversion
- Customizable optimization options for selective processing
- Compression statistics showing exact space savings
- Built-in CSS syntax validation for error detection
- File upload and download capabilities for batch processing
- Copy to clipboard or download results as .css files
Use Cases
- Production deployment - minify CSS before going live
- Performance optimization - reduce page load times
- CDN preparation - optimize files for content delivery networks
- Mobile optimization - reduce data usage for mobile users
- Build process integration - automate minification in pipelines
- Bandwidth optimization - reduce server transfer costs
Supported Formats
Related Keywords
Performance Tip
CSS minification can typically reduce file sizes by 20-40%. For best results, combine minification with gzip compression on your web server for even greater size reductions.
Privacy & Security
All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.