CSS Minifier
Remove unnecessary CSS whitespace and comments while checking basic syntax.
About CSS Minifier
Minified CSS removes presentation whitespace and comments to reduce the size of stylesheet text. This tool is useful for quick inspection and prototyping; production pipelines should still use a tested build tool configured for the project’s CSS syntax.
The minifier preserves whitespace inside quoted strings and checks for common structural errors such as unclosed comments, strings, and braces. It is not a complete CSS parser, so vendor extensions and advanced syntax should be tested in the browsers you support.
How to use this tool
Paste a CSS stylesheet and select Minify CSS. Resolve reported structural errors, then compare the minified result with the original before deploying.
Frequently asked questions
Does minification change CSS behavior?
It is intended to remove comments and insignificant whitespace only, but this lightweight tool is not a full standards parser. Test the output, especially when using custom properties or unusual syntax.
Are comments removed?
CSS comments outside quoted strings are removed. Text that resembles a comment inside a quoted string is preserved.
Can I use this instead of my production build step?
Use your project’s established CSS build and test pipeline for production. This tool is intended for quick browser-side conversions and review.
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