About the CSS Minifier
Shrink stylesheets for faster page loads. Beyond removing whitespace and comments, the CSSO optimizer shortens values (#ffffff → #fff, 0px → 0), merges duplicate selectors and drops redundant declarations. Comments starting with /*! (licences) are kept.
Your data is processed in the browser and never sent to a server, so it is safe to paste payloads that contain tokens or personal data.
How to use it
- Paste CSS or open a .css file.
- Choose whether to allow advanced restructuring.
- Copy or download the minified CSS.
Good to know
- If a page relies on specific rule order across files, test after enabling advanced optimizations.
- Syntax errors are reported instead of producing broken output.