XML Validator
Check if XML is well-formed and get error details.
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What is an XML Validator?
An XML validator checks whether your XML document is well-formed — meaning it follows XML syntax rules with properly nested tags, closed elements, and valid structure.
Use it before parsing XML in applications, publishing feeds, or sharing configuration files.
How to Use This Tool
Paste your XML into the input textarea.
Click Validate XML to check well-formedness.
Review the success or error message.
Fix any reported issues and re-validate.
Benefits of XML Validation
- Catch malformed XML before it breaks parsers
- Debug RSS, SOAP, and config files quickly
- Verify exports from databases and APIs
- Get parser error details to fix issues
- No server upload — validate privately
よくある質問
What is well-formed XML?
Well-formed XML has a single root element, properly nested tags, closed elements, and correctly quoted attributes.
Does this validate against an XML Schema?
This tool checks well-formedness only, not compliance with XSD or DTD schemas.
Is this tool free?
Yes. This tool is completely free to use with no sign-up, no limits, and no hidden fees.
Does my data leave my browser?
No. All processing happens entirely in your browser using client-side JavaScript. Your data is never sent to a server or stored anywhere.
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