XML formatter

XML formatter features

• 01

  Pretty-print or minify

  Format adds line breaks and indentation (2 or 4 spaces, or tabs). Minify strips inter-tag whitespace for compact size — useful when sending XML over the wire.

• 02

  Native DOM validation

  Validation goes through the browser's DOMParser, so error messages match exactly what an in-browser XML library would say. No extra dependencies, no server roundtrip.

• 03

  Big files welcome

  Pure-JS string formatting handles even multi-megabyte XML quickly. Browser memory is the only limit.

XML formatter FAQ

Does it support XML namespaces?

Yes. Namespaced elements like <ns:tag xmlns:ns="…">…</ns:tag> are preserved unchanged through formatting and minification.

Will it validate against an XSD or DTD?

No. Schema-based validation requires a different toolchain. This tool only checks well-formedness — that tags are balanced and attributes are quoted properly.

Why does my CDATA block get reformatted?

CDATA contents should be preserved verbatim. If you see whitespace creep into a CDATA block, paste a smaller subset — and report the case so we can tighten the formatter.

Is the XML uploaded anywhere?

No. Formatting, minification, and validation all run in your browser using native string operations and the DOMParser.