Paste or type XML to validate it.
Validates well-formedness: unclosed tags, mismatched elements, invalid characters, and more.
Paste or type XML to validate it.
Validates well-formedness: unclosed tags, mismatched elements, invalid characters, and more.
XML Validator
Validate XML against well-formedness rules. Identifies unclosed tags, malformed attributes, and invalid characters with precise error locations.
XML Validator Use Cases
- Validating API responses before processing in applications
- Checking configuration files before deployment to prevent errors
- Verifying XML data imports from third-party systems
- Debugging XML parsing issues in development environments
- Ensuring XML compliance before submitting to enterprise systems
XML Validator FAQ
What does XML validation check for?
XML validation checks for well-formedness including proper tag nesting, matching opening/closing tags, valid attribute syntax, correct character encoding, and compliance with XML specification rules.
What's the difference between well-formed and valid XML?
Well-formed XML follows basic syntax rules but may have structural issues. Valid XML is well-formed AND conforms to a specific DTD or XML Schema that defines the allowed structure and content.
How do I fix XML validation errors?
The validator shows exact line and column numbers for each error. Common fixes include: closing unclosed tags, fixing mismatched tags, removing duplicate attributes, and ensuring proper character encoding. Click on any error to see detailed explanations.