XML Validator

Paste your XML code into the validator and click "Validate". The tool will check for syntax errors, mismatched tags, unclosed elements, and well-formed structure. Error messages show line numbers and specific issues, making it easy to fix problems quickly.

Well-formed XML follows syntax rules: single root element, properly nested tags, quoted attributes, closed tags (<tag></tag> or <tag/>), and escaped special characters. The validator checks all these rules to ensure your XML is correctly structured.

Yes! The validator catches mismatched opening and closing tags, reports the line number where the mismatch occurs, and shows which tags don't match. This is one of the most common XML errors and is instantly detected.

Well-formed XML follows basic syntax rules (this tool checks). Valid XML follows both syntax rules AND a specific schema/DTD that defines allowed elements and structure. This tool validates well-formedness; for schema validation, you'd need an XSD validator.

Yes! Use the file upload button to load .xml files directly. The tool reads the file contents and validates them immediately, showing any errors. This is convenient for checking config files, SVG images, or large XML documents without copy-pasting.

Yes, the validator processes files locally in your browser and can handle large XML documents efficiently. Performance depends on your browser and system resources. All validation is client-side, so your XML never leaves your computer.