CSS Minifier
Minify your CSS code to reduce file size. Remove comments, whitespace, and unnecessary characters instantly.
Features
Everything you need to optimize your CSS for production.
Instant Minification
Remove comments, collapse whitespace, and strip unnecessary characters in milliseconds.
Size Comparison
See original vs. minified file size and exact percentage savings at a glance.
Safe Transforms
Only removes whitespace and comments — never changes selectors, values, or the structure of your CSS.
Size Savings
See exactly how many bytes you saved with a clear before-and-after size comparison.
How It Works
Three simple steps to minify your CSS.
Paste Your CSS
Enter or paste your CSS code into the input area on the left.
Click Minify
Hit the Minify button to strip comments, whitespace, and unnecessary characters.
Copy the Result
The minified CSS appears on the right. Click Copy to save it to your clipboard.
Related Tools
More tools to help you optimize your web code.
Frequently Asked Questions
Common questions about CSS minification.
What does CSS minification do?
CSS minification removes all unnecessary characters from your CSS code without changing its functionality. This includes comments, whitespace, newlines, and the last semicolon before closing braces. The result is smaller file sizes and faster page load times.
Will minification break my CSS?
No. This minifier only removes whitespace and comments — it never modifies selectors, property names, or values. Your CSS will render identically in all browsers after minification.
How much can I save by minifying CSS?
Savings vary depending on your code style. Well-commented, formatted CSS typically sees 20-40% reduction. Combined with GZIP compression on your server, you can achieve 70-90% total reduction in transfer size.
Is my CSS code sent to a server?
No. Your CSS is processed locally and never uploaded to any server. You can safely minify sensitive stylesheets without concern.