CSS Minifier
Compress CSS by removing whitespace, comments, and redundant code
Frequently Asked Questions
What does CSS minification do? +
CSS minification removes all unnecessary characters from your stylesheet — whitespace, line breaks, comments, trailing semicolons, and redundant values like leading zeros — without changing how your styles render. This reduces file size and improves page load speed.
Is my CSS sent to a server? +
No. All minification runs entirely in your browser using JavaScript. Your CSS never leaves your device — nothing is uploaded, stored, or transmitted.
Will minification break my styles? +
No. The minifier only removes characters that have no effect on how browsers interpret your CSS. All selectors, properties, and values are preserved exactly as written. Your styles will render identically.
What optimizations does this minifier perform? +
The minifier removes all comments, collapses whitespace, strips trailing semicolons before closing braces, removes unnecessary leading zeros from decimal values (0.5 becomes .5), shortens zero values (0px becomes 0), and removes unnecessary whitespace around selectors and properties.
How much space can I save? +
Savings depend on your original CSS formatting. Well-formatted stylesheets with comments typically see 20-40% reduction. Already-compact CSS may see smaller gains. The tool shows exact before/after sizes and savings percentage after each minification.