Free tool
DeveloperCSS Minifier
Minify CSS by stripping comments and extra spaces. Keep the same styles while cutting file size for faster loads.
Runs in your browser — your data stays on your device
Free toolReadable CSS helps teams; compact CSS helps users. This free CSS minifier removes comments and insignificant whitespace in your browser so frontend developers and students can shrink stylesheets during coding practice—without installing software. Use it before you compare payload sizes or hand a demo to a client.
How to use the CSS Minifier
- 1
Paste pretty-printed or mixed CSS.
- 2
Confirm bytes saved when minification succeeds.
- 3
Copy the compact stylesheet into your build or static file.
Why we minify styles before demos
Students often ship classroom CSS with large comment blocks and generous indentation. Minifying for delivery—and keeping a formatted source—teaches the same discipline production teams use with build pipelines.
CSS minifier with examples
Load the card stylesheet example, note original versus minified bytes, then copy the one-line result. Selectors and values stay the same; only formatting disappears.
Guides and next steps
Privacy note
CSS minification runs entirely in your browser. We do not upload your stylesheets.
Frequently asked questions
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