CSS Minifier
The CSS Minifier compresses CSS code by removing whitespace, comments, and unnecessary characters while preserving functionality. Minified CSS files are smaller, which reduces bandwidth and improves page load times. This minifier removes comments, trims whitespace, collapses redundant semicolons, and shortens hex colors where possible. It is essential for production websites where every kilobyte matters for performance and Core Web Vitals.
Formula
Minification removes: - Comments (/* ... */) - Whitespace (spaces, tabs, newlines) - Trailing semicolons - Leading/trailing spaces around braces - Reduces #ffffff to #fff Size reduction: 15-40%
Example
Input (245 chars): /* Button styles */ .btn { background: #ffffff; color: #333333; padding: 10px 20px; } Output (78 chars): .btn{background:#fff;color:#333;padding:10px 20px} Savings: 68% size reduction
How to Use
- Paste your CSS code into the input field
- Click minify to remove whitespace and comments
- The output shows compressed CSS
- Copy the minified CSS
- Use it in production for faster page loads
Frequently Asked Questions
Does minification break CSS?
No. Minification only removes whitespace, comments, and redundant characters that do not affect CSS functionality. The minified CSS produces the exact same styling as the original. Always keep the original for development and use minified for production.
Should I minify CSS in development?
No. Keep CSS readable during development for easier debugging. Only minify for production deployment. Many build tools (Webpack, Vite, Gulp) can automatically minify CSS during the build process.
What is the difference between minify and compress?
Minification removes unnecessary characters (reversible by formatting). Compression (gzip/Brotli) uses algorithms to reduce size further. For best results, minify first, then enable gzip/Brotli compression on your server. Both can be used together.
Can I minify CSS with media queries?
Yes. The minifier handles media queries, keyframes, and all CSS features. Media queries like @media (max-width: 768px) are preserved and minified correctly.
How much can I save with CSS minification?
Typically 15-40% size reduction, depending on how much whitespace and comments are in the original. Well-formatted CSS with many comments can see 50%+ reduction. Already-compact CSS sees less improvement.