Free OnlineDeveloper Tools
CSS Minifier
Minify CSS code to reduce file size. Remove comments, whitespace, and optimize selectors for faster page loads.
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Key Features — CSS Minifier
Removes comments and unnecessary whitespace
Shortens color values like #ffffff to #fff
Merges duplicate selectors
Removes empty rule sets
Shows file size reduction percentage
Why Use This Tool — CSS Minifier
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Works Everywhere
Use on any device — desktop, tablet, or phone. No downloads or plugins needed.
Frequently Asked Questions — CSS Minifier
How much file size reduction can I expect?
Typical CSS files see a 20% to 50% reduction in file size after minification. Files with many comments and generous formatting see the largest reductions. The tool displays both the original and minified sizes along with the percentage saved.
Will minified CSS work the same as the original?
Yes. Minification only removes characters that have no effect on how the CSS is interpreted by browsers. The visual rendering of your website will be identical. The minified code is just harder for humans to read.
Does it optimize shorthand properties?
Yes. The minifier converts longhand properties to shorthand where possible. For example, separate margin-top, margin-right, margin-bottom, and margin-left declarations can be combined into a single margin shorthand if appropriate.