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XML Formatter & Validator

Developer utilities · Done in 3 steps

Stays on your deviceFree · No sign-up
  1. 1Paste your XML
  2. 2
  3. 3
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About

Pretty-print or minify XML, keep comments and CDATA intact, and check well-formedness with the error's line and column.

How to use it

  1. 1Paste XML, open a file (.xml, .svg, .rss…) or click Sample.
  2. 2Choose Pretty print with an indent, or Minify.
  3. 3Check the well-formedness result underneath.
  4. 4Copy or download the result.
You give
XML documents, including SVG, RSS/Atom, sitemaps and config files
You get
Indented or minified XML and a validation verdict
Good to know
Checks well-formedness only (matching tags, quoting, single root) — it does not validate against an XSD or DTD. Whitespace inside text nodes is normalised when pretty-printing, so don't use it on whitespace-sensitive mixed content.
Privacy
Processed on your device. Nothing is uploaded, stored or logged.
Last tested
2026-10-28

FAQ

What does “not well-formed” mean?

The XML breaks a basic rule: an unclosed or mismatched tag, an unquoted attribute, an unescaped & or <, or more than one root element.

Are comments and CDATA kept?

Yes. Comments, CDATA sections, processing instructions and the XML declaration are kept as written. Minify can optionally remove comments.

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