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Free tool No accountCSS Minifier & Beautifier
Minify CSS to ship smaller files, or beautify it to read — all local.
Input
Output
AI uses your own key (several are free); a button opens a short setup.
About the CSS Minifier & Beautifier
Minify CSS by removing comments, spaces and line breaks so stylesheets load faster, or beautify minified CSS so you can read and edit it.
How to use it
- Paste the CSS.
- Choose Minify or Beautify.
- Copy or download the result.
Questions
How much smaller does CSS get?
Usually 15–30 %, more when the file has many comments. Your server's gzip or Brotli compression saves even more on top.
Is my data uploaded?
No. The tool runs in your browser; what you paste or open never leaves your device and nothing is stored on a server.