CSS Minifier
Minify and optimize CSS code. Remove whitespace, comments, and reduce file size for faster loading websites.
Upload CSS File or Drag & Drop
Upload .css files or paste your CSS code below
Supports .css files • Max 5MB • Or paste CSS directly in the editor
Input CSS
Minified CSS
Before & After Comparison
Recent Minifications
CSS Examples
Try these examples or use your own CSS code:
About CSS Minification
CSS minification is the process of removing unnecessary characters from CSS code without changing its functionality. This reduces file size and improves website loading times.
Benefits of CSS Minification:
- Faster Page Load Times: Smaller files download quicker
- Reduced Bandwidth Usage: Lower data transfer costs
- Improved SEO: Page speed is a ranking factor
- Better User Experience: Faster loading improves engagement
- Caching Efficiency: Smaller files cache more effectively
What Our Minifier Removes:
- Whitespace: Spaces, tabs, and line breaks
- Comments: Both /* */ and // comments
- Unnecessary Semicolons: Last semicolon in blocks
- Shortenable Values: #FFFFFF → #FFF, 0px → 0
- Redundant Declarations: Duplicate properties
Advanced Features:
- Safe Minification: Never breaks your CSS
- Multiple Optimization Levels: From basic to aggressive
- Real-time Preview: See changes instantly
- Comparison View: Compare before/after side-by-side
- File Support: Upload .css files or paste code
- History Tracking: Keep track of your minifications
Best Practices:
- Always keep a copy of your original, unminified CSS
- Test minified CSS thoroughly before deploying to production
- Use source maps for debugging minified code
- Consider gzip compression in addition to minification
- Regularly update your minification tools
Note: This tool performs minification entirely in your browser. Your CSS code never leaves your computer, ensuring complete privacy.