Loading…
Not just whitespace removal: CSSO merges rules where that is safe and shortens colours and units, so #ff0000 becomes red. Licence comments marked /*! survive. It all runs on your device.
Comments go, rules merge where that’s safe, and colours and units shrink —#ff0000 becomesred. Comments marked/*! are kept, so licence headers survive.
The engine downloads once, then stays ready for the rest of your visit.
Paste code, or open a file.
Paste into the editor or open a file — everything you add stays in this tab, and you see exactly what the tool will work on before anything runs.
Your browser does all the work locally. Nothing is uploaded — what you paste never leaves this tab, so there’s nothing for anyone to store, scan, or leak.
Take the result to your clipboard or save it as a file. Close the tab and nothing of what you pasted remains.