XML Validator Online

Paste your XML and check whether it is well-formed. Parser errors are shown with the exact reason so you can fix them quickly.

What does XML validation check?

This tool checks well-formedness: every opening tag has a closing tag, elements are properly nested, attributes are quoted, and there is exactly one root element. It does not validate against an XSD schema.

FAQ

What is the difference between valid and well-formed XML?

Well-formed means the XML follows the basic syntax rules of the spec. Valid means it also conforms to a specific schema (XSD, DTD). This tool checks well-formedness only.

Why does my XML fail even though it looks correct?

Common causes: missing closing tags, unescaped special characters (& < >), or mismatched attribute quotes. Check the error message for the line and character offset.

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