What you can do here
- XML well-formedness validation
- Browser parser feedback
- Mismatched tag detection
- Actionable parser findings
- No XSD claims
- Browser-local processing
Checks whether the XML document is well-formed locally.
XML validation guide
Paste XML into the validator above when a parser, API client, feed reader, or integration reports malformed markup. The browser parser checks whether the complete document is well-formed and returns an error before downstream application rules are considered. This tool is free to use. No account or payment is required.
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The validator checks XML well-formedness: the document must have a valid root element, properly nested tags, correctly quoted attributes, and markup the browser XML parser can consume.
A Valid XML result does not mean the document satisfies an XSD, DTD business constraint, SOAP contract, or application-specific schema.
Checking syntax first creates a clean debugging boundary. If the XML parser succeeds, continue with schema, namespace, or application validation. If it fails, fix the document structure before debugging consumers.
The parser runs in the browser and the source document is not posted to a VetaTool backend.
A mismatched closing tag fails parsing until the child element is closed correctly.
<service><name>api</service><service><name>api</name></service>Common questions
It means the browser parser accepted the document as well-formed XML.
No. This page checks well-formedness, not XSD or application-specific rules.
Yes. Paste the XML text into the checker and the validation runs locally in the browser.
Debugging a specific XML issue? Browse XML troubleshooting.