Meta Title & Description Preview
Check title and description length alongside a search-style preview.
SEO & websitesSEO & websites tools
CSS Minifier
Remove unnecessary CSS spacing and comments using a parser.
Your workspaceProcessed in your browser
Loading workspace…
How to use css minifier
- Paste CSS without a style-element wrapper into Source code.
- Choose Minify code for input within 250,000 UTF-8 bytes.
- Review CSSO rewrites and test the minified.css in its actual page.
Work through an example
Use CSSO to compact CSS, compare UTF-8 byte counts, and verify the result in its intended page.
Minify a small stylesheet and inspect the parser's rewrites →Formats, privacy, and practical limits
This tool processes the values you enter in your browser. No account or upload to ERITHRA is required.
Files and generated results exist only for this tab session. Download any result you want to keep before leaving the page. Browsers may use temporary memory or disk cache while processing.
Frequently asked questions
Does minification only remove spaces?
No. CSSO can also shorten values and restructure equivalent CSS, such as changing #ffffff to #fff and four zero margins to one.
Does it bundle imports or remove unused selectors?
This interface does not fetch imports or inspect your pages to determine selector usage; it minifies the supplied stylesheet.