CSS Minifier
Remove comments, whitespace, and unnecessary characters from CSS to reduce file size.
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Why Minify CSS?
CSS minification removes all unnecessary characters — whitespace, line breaks, comments — from your stylesheet without changing how it works. A well-minified CSS file can be 20–60% smaller than the original, which translates directly to faster page load times, better Core Web Vitals scores, and improved SEO rankings. Browsers parse and execute minified CSS just as well as formatted CSS.
What Gets Removed
Comments
/* CSS comments */ are stripped — they have no effect in browsers and only serve developers.
Whitespace & Newlines
Multiple spaces, tabs, and newlines are collapsed to single spaces or removed entirely.
Spaces Around Symbols
Spaces before and after {, }, :, ;, and , are removed as they are not required by the CSS spec.
Trailing Semicolons
The last property in each rule block doesn't need a semicolon, saving one character per block.
FAQ
Does minified CSS work the same as formatted CSS?
Yes, completely. Whitespace and comments have no effect on how browsers interpret CSS — removing them doesn't change any styling behavior.
Should I serve minified CSS in production?
Absolutely. Always serve minified CSS in production. Keep the original formatted source for development and version control. Tools like webpack, Vite, and Parcel minify CSS automatically in production builds.
How much can CSS be reduced?
Typical CSS files see a 20–40% size reduction. Files with many comments and verbose formatting can achieve up to 50–60% reduction.