Online XML Validator
Check XML syntax, verify tag nesting and closures, and validate documents instantly inside your browser.
Free Online XML Validator & Syntax Checker
Extensible Markup Language (XML) is widely utilized for configuration files, RSS feeds, SOAP web services, and data interchange. Because XML mandates rigorous structural compliance, unclosed tags or mismatched elements will trigger parsing errors. Our XML Validator uses the browser’s native DOM parser to instantly inspect and verify your markup.
How XML Syntax Verification Works
Using the browser’s built-in DOMParser engine, raw XML strings are parsed into an XML document tree. If the markup contains unclosed tags, illegal characters, or syntax mismatches, the parser throws an explicit error highlighting the structural break.
Frequently Asked Questions (FAQ)
Is my XML data secure and private?
Yes, all checking executes entirely within your browser runtime with complete data privacy.
What are common XML validation errors?
Common issues include missing closing tags, unescaped special characters like raw ampersands (&), and improperly nested child elements.