XML Validator
Validate XML well-formedness with line-number error pinpointing.
100% Client-Side · No Upload
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What is XML Validator?
XML Validator is a well-formedness checker that ensures your XML elements are strictly compliant with parser rules. It identifies unmatched tags, incorrect nested order, illegal namespaces, and missing quotes in attribute declarations.
How to use XML Validator?
1
Paste the XML feed or markup into the validator panel.
2
Validation runs automatically, or click "Validate" to execute.
3
View any diagnostic errors, complete with line numbers and highlights pointing directly to issues.
4
Once clean, a green success banner confirms well-formedness.
Interactive Example
Finding an unclosed XML tagTEXT
Input / Sample Source
<note>
<to>User</to>
<from>Saish
</note>Output / Result
Error: Expected </from> but found </note> on line 4.Benefits & Features
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Strict ValidationInstantly checks tag parity, closing structures, and namespaces.
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Line-Specific ErrorsHighlights exact locations where tags are unbalanced or misconfigured.
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No Network TransmissionsHighly secure execution locally inside the client.
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RSS/Atom CheckerGreat for ensuring web feeds compile correctly before publishing.