XML Validator
Validate XML documents and find syntax errors.
About XML Validator
The XML Validator instantly checks your XML documents for syntax errors, missing closing tags, and malformed structures. It provides precise line numbers for errors to help you debug quickly.
How to Use
Real-World Examples
Fixing Unclosed Tags
A common error is forgetting to close a tag. The validator will point exactly to where the closing tag is expected.
<user> <name>John Doe</name> <email>john@example.com </user>
<user> <name>John Doe</name> <email>john@example.com</email> </user>
Best Practices
- Always define an XML declaration (e.g., `<?xml version="1.0" encoding="UTF-8"?>`) at the top of your document.
- Use consistent naming conventions for tags, like lowercase with hyphens or camelCase.
Common Errors
Mismatched closing tag
Ensure every opening tag has an exact matching closing tag, and they are properly nested.
Unescaped characters
Replace characters like '<' and '&' with '<' and '&' respectively inside text nodes.
Frequently Asked Questions
Does it support XML Schema (XSD) validation?
Currently, this tool performs syntax (well-formedness) validation. Strict XSD schema validation is planned for a future update.
Is my data secure?
Absolutely. All processing is done locally in your browser. Your data is never sent to our servers.
Security & Privacy
All XML parsing and validation is done locally in your browser using secure DOM APIs. We do not evaluate external entities (XXE), and your data never leaves your machine.