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XML Validator

Check if your XML is well-formed and valid

Validate XML

Check XML syntax

How to Use Validate

  1. 1 Paste your XML into the input area
  2. 2 Validation runs automatically
  3. 3 View any errors with line numbers
  4. 4 Fix issues using the suggested corrections

What does "well-formed XML" mean?

Well-formed XML follows basic syntax rules: proper tag nesting, closed tags, quoted attributes, and a single root element. This validator checks all these requirements.

Why is my XML showing as invalid?

Common issues include: unclosed tags, mismatched tag names, unescaped special characters (&, <, >), or missing root element. The validator shows exact error locations.

Can I validate against an XSD schema?

Currently this tool validates well-formedness (syntax). For schema validation against XSD, you would need a specialized schema validator.

How do I fix "unexpected character" errors?

Special characters like &, <, > must be escaped as &amp;, &lt;, &gt; when used in text content. The validator will show you which character caused the error.

All processing happens locally in your browser. Your XML never leaves your device.