Web Dev Tools
CSS Minifier & Formatter
Compress CSS code to reduce file size or beautify messy CSS for readability. Free, fast, and works entirely in your browser.
Use CSS Minifier & Formatter to get instant results without uploads or sign-ups. Everything runs securely in your browser for fast, reliable output.
Your results will appear here.
About this tool
Minification is the process of removing whitespace, newlines, comments, and other unnecessary characters from code without changing its functionality. For CSS, this is crucial for web performance.
Smaller CSS files download faster, parsing faster, and speed up your website's Time to First Byte (TTFB). Our tool can reduce CSS file size by up to 20-40% typically.
If you inherit a project with "spaghetti code" or minified files, use the "Beautify" mode to restore it to a readable, indented format instantly.
Usage examples
Minification
Compress standard CSS
body {
color: red;
} → body{color:red} Beautify
Format messed up CSS
div{margin:0} → div {
margin: 0;
} How to use
- Paste your CSS code into the input field.
- Click "Minify" to compress it into a single line.
- Click "Beautify" to expand it with proper indentation.
- Click "Copy" to use the optimized code in your project.
- Check the "Savings" stats to see how much space you saved.
Benefits
- Drastically reduces file size
- Improves website load times (SEO)
- Restores unreadable minified code
- Removes comments automatically
- Safe optimization (preserves hacks)
- Privacy-focused local execution
FAQs
Does minification break my CSS?
No. Minification only removes characters that the browser doesn't need, like spaces, tabs, and comments. The instructions for the browser remain exactly the same.
How much space can I save?
It depends on your coding style, but typically you can expect 20% to 50% size reduction. Removing comments usually yields the biggest savings.
Should I minify CSS for production?
Yes! Minified CSS loads faster, uses less bandwidth, and improves page load times. Always keep an unminified version for development and maintenance.
Will minification affect CSS functionality?
No, minification preserves all functionality including CSS hacks, vendor prefixes, and special syntax. It only removes unnecessary whitespace and comments.
Can I minify CSS that already has vendor prefixes?
Yes! Our minifier safely handles vendor prefixes like -webkit-, -moz-, -ms-, and -o-. They remain intact and functional after minification. All browser-specific CSS properties are preserved.
Do I need to keep my original CSS file?
Absolutely! Always maintain your original, well-formatted CSS for development and debugging. Use minified versions only for production deployment. This makes future updates and troubleshooting much easier.
How does minification compare to Gzip compression?
Minification and Gzip work together! Minification removes unnecessary characters (20-40% reduction), Gzip compresses the minified file further (70-80% reduction). Always minify first, then enable Gzip on your server. Combined, you can reduce CSS file size by 80-90%!
Will minification remove CSS variables or custom properties?
No! Minification preserves all CSS variables (custom properties like --main-color), calc() functions, and modern CSS features. Only whitespace, comments, and unnecessary characters are removed. Your CSS functionality remains 100% intact.
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