CSS Minifier
Compress and minify CSS stylesheets by removing whitespace, line breaks, and comments. · Updated
CSS minification strips comments and whitespace so stylesheets ship smaller without changing cascade behavior. Running locally means production CSS never leaves your browser while you experiment with delivery size.
Common errors and fixes
Unexpected }
Remove an extra closing brace or restore a missing selector block.
Unclosed comment
Close CSS comments with */; unterminated comments swallow following rules.
Invalid property value
Check units and function parentheses (rgb(), calc(), url()).
Empty stylesheet
Paste CSS rules before minifying; blank input produces empty output.
Options
| Option | Description |
|---|---|
| Strip Comments | Remove all block /* ... */ comments from the minified stylesheet output. |
FAQ
Why should I minify CSS?
Minifying CSS reduces stylesheet payload sizes by 20% to 50%, improving First Contentful Paint (FCP) and Google Core Web Vitals.
Does CSS minification break valid layout rules?
No. Minification only strips non-functional whitespace, newlines, and comments without altering CSS declarations.