XML

XML Validator

Check whether XML is well-formed, with the line and column of any error.

XML input
Output

Result appears here after you select

{ } How to use

  1. Paste your XML.
  2. Select Process — errors report the line and column.

{ } How it works

XML Validator works on the text you provide. Select Process ▸ and it runs entirely in your browser — nothing is uploaded to a server — then shows the result in the Output panel.

Input

  • XML input — paste or type your input in the left panel (use Sample for an example)

Output

TXT text — copy or download it from the Output panel.

{ } Common uses

  • Find the unclosed tag in a document a parser refused.
  • Check a hand-edited config before deploying it.
  • Confirm a generated document is well-formed.

{ } Limitations

  • This checks well-formedness only: tags balance, attributes are quoted, one root element. It does not validate against a DTD, an XSD or any other schema, so a well-formed document can still be wrong for its purpose.
  • Namespace prefixes are not resolved, and an undeclared prefix is not reported as an error.

{ } FAQ

Is my data uploaded to a server?

No. Everything runs locally in your browser — your files never leave your device.

Can I process more than one file at once?

This tool works on one input at a time.

Is this tool free?

Yes — it’s completely free and needs no sign-up.

What is the difference between well-formed and valid?

Well-formed means the syntax is right. Valid means the content also matches a schema — the right elements in the right order with the right types. This tool answers the first question.