XML Validator
Check your XML for syntax errors instantly. Validates well-formedness, proper tag nesting, and identifies the exact location of any issues. 100% free and secure.
How to Validate XML
- Paste your XML data in the input area
- Click the "Validate" button
- View validation results with error locations if any
- Fix errors and re-validate until your XML is valid
Common XML Errors
Unclosed Tags
Every opening tag must have a matching closing tag or be self-closing.
Improper Nesting
Tags must be properly nested. <a><b></a></b> is invalid; <a><b></b></a> is correct.
Unquoted Attributes
Attribute values must be enclosed in quotes: <tag attr="value">
Special Characters
Characters like <, >, & must be escaped as < > &
Frequently Asked Questions
What does the XML Validator check?
The validator checks that your XML is well-formed: proper tag nesting, closed tags, valid characters, and correct attribute syntax. It identifies the exact location of any errors.
What makes XML 'well-formed'?
Well-formed XML has a single root element, all tags are properly closed, tags are correctly nested (no overlapping), attribute values are quoted, and element names follow naming rules.
Does this validator check against a schema (XSD)?
This validator checks for well-formedness (syntax). Schema validation (XSD/DTD) validates against specific document structure rules. This tool focuses on syntax validation.
Is my XML data secure?
Yes, all validation happens directly in your browser. Your XML is never sent to any server or stored anywhere.