Paste your stylesheet and get a minified version instantly — comments stripped, whitespace collapsed, bytes saved. Runs entirely in your browser; your CSS never leaves your device.
Comments are removed (except inside strings and url()), whitespace is collapsed, spaces around { } : ; , > + ~ are dropped, the last semicolon before } is trimmed, and leading zeros (0.5 → .5) plus units on zero (0px → 0) are shortened conservatively.