Enter inert CSS source and select Run.
Method and example
A deterministic lexical scanner protects strings and comments while recognizing CSS punctuation. Format mode creates stable indentation; minify mode removes ordinary comments and collapses structural whitespace.
Formatting `.card{color:red}` produces a readable rule. Formatting the formatted result is byte-identical; minifying twice is also byte-identical.
Scope and limitations
This tool never applies the CSS, previews it, or fetches url() resources. It performs formatting—not complete CSS validation. Input is limited to 5 MB UTF-8.
All output remains inert text. User source is never executed in the main page or sent to a remote parser.