Developer
Browser-based
CSS Minifier
Minify CSS code in your browser to reduce file size and clean up stylesheets.
Your CSS is minified locally in your browser and is never uploaded.
Original: 0 B Minified: 0 B Saved: 0%
How to use CSS Minifier
Use CSS Minifier when you need a quick developer utility without installing software or creating an account. Enter your values or text in the tool above, review the instant result, then copy or save the output when the tool supports it.
- Works directly in a modern browser on desktop or mobile.
- Designed for fast repeat use from the root URL
/css-minifier. - Input stays in your browser unless a tool clearly says otherwise.
Features
- Remove CSS comments
- Collapse extra whitespace
- Remove spaces around CSS syntax
- Show original and minified file size
- Copy minified CSS instantly
Use Cases
- Reducing CSS file size
- Cleaning pasted CSS snippets
- Preparing simple static site styles
- Quick code cleanup before publishing
Frequently Asked Questions
Is my CSS uploaded?
No. CSS minification happens entirely in your browser.
Can this replace a production build tool?
For simple CSS cleanup, yes. For advanced optimization, a full build pipeline may still be useful.
Does it support media queries?
Yes. The minifier preserves CSS syntax including media queries while removing unnecessary whitespace.
Will it change how my CSS works?
It is designed to preserve behavior, but always test important CSS before publishing.