Canonical utility file

CSS Minifier

Drag, drop, paste, compress, copy, and download CSS — no server, no framework, no ceremony. Powered by the CSSO engine with a conservative fallback.

How this page works. One file. One job. Load CSS by drag-and-drop, file picker, or paste. CSSO strips comments, collapses whitespace, and optimises selectors locally. Nothing leaves the page.

Source CSS

input
Drag and drop a .css file here or click to choose a file · focus here then Ctrl+V to paste

Minified CSS

output
Original 0 B
Minified 0 B
Saved 0%

CSSO engine: syntax-safe restructuring minification — removes comments, extra spaces, and optimises selectors. Falls back to a conservative minifier if CSSO is unavailable.

Ready.