The CSS minifier compresses CSS by removing comments, whitespace, and redundant semicolons. See the original size, minified size, and exact bytes saved so you can quantify the optimization before deploying.
Minified CSS will appear here...
How CSS Minification Works
CSS minification removes everything that isn't needed for the browser to parse and apply styles: comments, whitespace, extra semicolons, and line breaks. The resulting CSS is functionally identical but smaller, reducing page load time especially on mobile connections.
What Gets Removed
All CSS comments (/* ... */), whitespace between selectors and declarations, newlines, trailing semicolons before closing braces, and redundant spaces around colons and brackets.
FAQ
Is this CSS minifier free?
Yes, completely free with no signup. All minification runs locally in your browser.
What does CSS minification do?
CSS minification removes all whitespace, line breaks, comments, and redundant semicolons that are not needed for the CSS to function. The resulting CSS is identical in behavior but smaller in file size, which reduces page load time.
Is it safe to minify production CSS?
Yes, but keep the original non-minified source in version control. Minification is a lossless operation — the CSS behavior doesn't change. Always test in a staging environment before deploying minified CSS to production.
How much smaller will minified CSS be?
Typical CSS files see 20-40% reduction through minification alone. Combined with gzip compression on the server, total transfer savings are often 60-80% compared to the uncompressed original.
Are CSS comments preserved?
By default, all CSS comments are removed. If you need to preserve specific comments (like licensing headers), look for tools that support 'important' comment preservation with /*! syntax.