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XML Syntax Validator
Check XML 1.0 well-formedness, namespace use, and safe resource bounds.
XML
XML
Browser only
Your input and output are processed in this browser. They are not uploaded for processing. No account is required.
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How to use this tool
- Paste XML text or choose a UTF-8 file; a chosen file takes precedence.
- No DTD, custom entity, schema fetch, or external resolution is allowed. This is syntax validation, not XSD validation.
- Select Process data, review the result, and download it. Use Reset to clear the working data.
Examples
<people><person><name>Alice</name><score>10</score></person><person><name>Bob</name><score>20</score></person></people>
Limitations
XML 1.0, UTF-8, at most 40 nesting levels and 200,000 nodes. No DOCTYPE/custom entities/external resolution. Parser normalizes line endings, entity spelling, and attribute whitespace. 5 MiB input, 20 MiB output.
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