Developer Tools
CSS Minifier
Remove CSS comments and whitespace for smaller stylesheet files — browser-only, no uploads.
No uploads — browser onlyInstant result
CSS Input
How to minify CSS
- Paste your CSS code into the input area.
- Click Minify CSS.
- Copy the minified output — the size savings are shown above the result.
Privacy — processed in your browser
Minification runs entirely in your browser using JavaScript string processing. Your code never leaves your device — no server call, no data collection.
Frequently Asked Questions
What does CSS minification remove?
CSS comments (/* ... */), unnecessary whitespace around selectors and properties, trailing semicolons before closing braces, and blank lines.
Does minification change how CSS renders?
No — CSS minification only removes whitespace and comments. Selectors, properties, and values are preserved exactly. The resulting stylesheet produces identical rendering.
Does it handle @media queries and @keyframes?
Yes — at-rules, nested selectors, and special characters are handled correctly.
How do I go back to readable CSS?
Use the CSS Formatter tool to prettify your CSS back to a human-readable, indented format.