Checks whether XML is well-formed.
XML Validate checks whether an XML document is well-formed and reports the first syntax error it finds, including the line and column where it occurs. Paste your markup and the tool instantly confirms valid XML or surfaces issues like mismatched tags, unclosed elements, or repeated attributes. It is handy whenever you need a quick well-formedness check without setting up a parser or editor plugin.
No. Validation runs entirely in your browser using a client-side parser. Your XML is never sent to a server or stored remotely.
No. It only checks well-formedness, that is, correct tag nesting, closing tags, attributes, and overall syntax. It does not validate against an XSD, DTD, or RELAX NG schema.
On invalid input it shows the first problem the parser encounters, such as a mismatched closing tag, an unexpected character, or a repeated attribute, often with the line and column where it was found.
No. Empty or whitespace-only input is reported as an error because no start tag is found. A valid document needs at least one element.
Yes. As long as the markup is well-formed, unicode text and emoji inside element content validate normally.