CSS Minifier Online
Shrink your stylesheets: comments and whitespace stripped, styles untouched.
About this tool
The CSS minifier removes comments, collapses whitespace and drops redundant semicolons
to produce the smallest valid stylesheet. Strings (like url("...") and
content values) are protected, and spaces that CSS needs, inside
calc(), between selector parts and in media queries, are kept, so nothing breaks.
Smaller CSS means faster page loads, one of the easiest front-end wins there is.
How to use
- 1. Paste your CSS.
- 2. Click Minify CSS.
- 3. Copy or download the compressed output for production.
Frequently asked questions
Is the CSS minifier free?
Yes, unlimited, no signup.
Will it break my CSS?
No. Comments and whitespace are removed only where safe; quoted strings, url() values and the spaces calc() needs around + and - are preserved.
Does it handle @media queries?
Yes, at-rules, media queries and keyframes minify normally.
Is my CSS uploaded anywhere?
No, minification runs entirely in your browser.
Is your website secure? Run the free 7-section scan: vulnerabilities, malware, headers, SEO and speed.
Scan my websiteRelated tools
More from Formatters & Minifiers and Developer.