CSS Minifier Online
Remove comments, whitespace, and redundant characters from CSS.
Runs entirely in your browser
Minified output will appear here
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How to use CSS Minifier
- 1Paste your CSS code into the input field.
- 2Click 'Minify' to remove comments, whitespace, and unnecessary characters.
- 3Copy the minified output to include in your production build.
Privacy & security
CSS minification runs entirely in your browser. Your code is never uploaded or transmitted to any server.
Your CSS is minified entirely in your browser. No code is transmitted.
Frequently asked questions
What does CSS minification remove?
Minification removes comments, extra whitespace, newlines, and redundant semicolons — producing functionally identical CSS in a smaller file.
How much smaller will my CSS get?
Typically 20-40% smaller for hand-written CSS with comments and spacing. Results depend on how verbose the original is.
Does minification affect browser compatibility?
No. Minification only removes whitespace and comments — it does not change property values or introduce compatibility issues.