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XML Validator Online - Free Check XML Syntax

Free online XML validator. Check XML syntax, well-formedness, and get error details with line numbers.

XML Validator

Validate XML syntax

Features

  • XML syntax validation
  • Well-formedness checking
  • Unmatched tag detection
  • Duplicate attribute detection
  • Detailed error messages with line information
  • Pretty-print with automatic indentation
  • No external dependencies required
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