XML Checker

This tool validates XML documents for well-formedness and optional schema compliance. It uses a standard XML parser to check syntax, encoding, and document structure, returning errors with line and column details. When a schema (DTD or XSD) is provided, it performs optional schema validation and reports violations with precise locations. The focus is on structural correctness rather than data semantics. Beneficiaries include developers integrating XML in APIs, data engineers processing XML payloads, QA teams validating configurations, and technical writers producing XML documentation. The tool’s value lies in rapid feedback, reproducible results, and easy integration into automated workflows. Core features include quick well-formedness checks, optional DTD/XSD validation, detailed error reporting, encoding detection, and safe handling of problematic inputs.