CSS Formatter

Make CSS rules and declarations easier to read with consistent spacing and indentation.

Up to 200,000 characters. UTF-8 files up to 800,000 bytes. Output limit: 4,000,000 characters. Processing time limit: 20 seconds.

Download CSS

Your source is processed in your browser and is not uploaded to ToolPixels. This tool does not save your input.

How to use it

  1. Paste CSS or open a UTF-8 file. Load the example to try it.
  2. Choose indentation, then select Format CSS.
  3. Review the output. If an error appears, correct your input and try again.
  4. Copy the result or download css-formatter.css.

Readable CSS without loading it

Uses the Prettier CSS parser. Strings, selectors, custom properties, and nested rules are parsed as source; styles are never applied to this page and URLs are not fetched. This is formatting, not a check that every property or value is supported by browsers. Use plain CSS rather than Sass or Less.

Only the required local processor is loaded when you run the tool. Large jobs run in a cancellable background worker. Source and results remain text, including scripts, markup, and URLs.

Related developer tools