It parses the complete document and checks XML well-formedness, including matching tags, valid nesting, quoted attributes, and a single root element. It also reports the parser location when the browser provides one.
No. This tool checks whether XML is well-formed. It does not fetch or evaluate external XSD or DTD schemas, so a well-formed result does not guarantee conformance to a separate schema.
No. Validation runs locally with your browser's XML parser. The pasted or uploaded document is not sent to our server.
Well-formed XML follows XML syntax rules. In strict XML terminology, valid XML is also checked against a DTD or schema. This tool performs the well-formedness check and labels that limitation clearly.
