CSS Minifier

Minifying removes everything a browser does not need in order to render your styles: comments, indentation, the newline between rules, the last semicolon in each block. None of it changes what the stylesheet does, and on hand-written CSS it commonly saves 20–40%.

The risk is not the removal, it is what a tool considers removable. Regex-based minifiers split on structural characters wherever they appear, which truncates any inline data URI at its first semicolon and mangles any content string containing a brace. Both failures produce output that looks fine and renders wrong.

This one parses the stylesheet before touching it, which is why both cases survive. It also shortens hex colours only when the digit pairs genuinely repeat, and strips units from zero lengths without touching time values or keyframe percentages — the two places that rule quietly breaks things.