XML Validator
Validate XML syntax and check for well-formedness
How to Use XML Validator
- Paste your XML into the input field
- Validation happens automatically
- Valid XML shows a green success message
- Errors show line numbers and descriptions
About XML Validator
Validate your XML documents for proper syntax and well-formedness. Get detailed error messages showing exactly where problems are. Essential for debugging XML feeds, configuration files, or API responses.
Frequently Asked Questions
What does "well-formed" mean?
Well-formed XML follows basic syntax rules like proper tag nesting, closing tags, and valid characters.
Does this validate against an XSD schema?
No, this checks syntax only. Schema validation (XSD/DTD) may be added in the future.
What errors does it catch?
Missing closing tags, mismatched tags, invalid characters, encoding issues, and attribute errors.
Can I validate large XML files?
Yes, but very large files may be slow. For best performance, keep files under 5MB.