Free CSS Minifier
This CSS minifier removes comments and unneeded whitespace from stylesheets, handy before pasting custom CSS into themes and builders that lack build tools. Paste CSS, minify, and see bytes saved. Nothing is uploaded.
How it works
Comments are stripped, then whitespace around symbols ({ } : ; ,) is removed and remaining runs collapse. String contents in quotes are preserved so content values and URLs survive intact.
Example
| Before | After |
|---|---|
.a { color: red; } | .a{color:red} |
Frequently asked questions
Will minifying break my CSS?
These transforms are whitespace-only and safe for standard CSS. Test complex files before deploying.
Are quotes preserved?
Yes. Quoted strings are protected so content and URL values survive.
Does order matter?
Minification never reorders rules, so the cascade behaves identically.
Should I keep the original?
Yes. Always edit the readable original and minify as the last step.
Is my code uploaded?
No. Minification happens locally in your browser.
Related tools
- HTML Minifier, shrink markup too.
- Text Cleaner, tidy plain text.
- JSON Formatter, minify data as well.