Code and markup that's been minified, auto-generated, or just inconsistently indented by different contributors over time is hard to read exactly when you need to read it most — mid-debugging, under time pressure.
One formatter for the front-end trio
HTML, CSS and JavaScript each have their own formatting conventions, but the underlying need is the same: consistent indentation, sensible line breaks, and readable structure. The HTML / CSS / JS Formatter handles all three without needing separate tools for each.
XML needs its own validator, not just formatting
XML's stricter syntax rules — every tag must close, attributes must be quoted, one root element only — mean a formatter alone doesn't catch every problem; a validator that actually parses the document does. The XML Formatter / Validator does both at once, surfacing the exact line where a document breaks the spec.
Both tools process everything locally in your browser tab — pasting in a config file or API payload never sends it anywhere.
