CSS Minifier Online
Use this free online CSS Minifier tool to remove comments, whitespace, and redundant characters from CSS. All processing is done locally in your browser.
Minified output will appear here
How it works & FAQ
Why this is secure?
CSS minification runs entirely in your browser. Your code is never uploaded or transmitted to any server.
Step-by-Step Guide
- 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.
Frequently Asked Questions (FAQ)
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.
Your CSS is minified entirely in your browser. No code is transmitted.