OOXML Validator

The OOXML Validator Online analyzes Office Open XML files (DOCX, XLSX, PPTX) to confirm structural correctness and schema conformance. It parses internal parts, relationships, and XML content to detect malformed content, misplaced elements, or invalid namespaces. The tool does not modify the input; it reports findings and provides precise error locators to aid remediation.
Core workflow extracts core files, validates against ECMA-376 and OpenXML schemas, and reports errors with precise locations such as part name and line number. Optional checks include strict schema validation, relationship integrity checks, MIME type alignment, and version compatibility.
Who benefits include developers, QA engineers, content teams, and CI pipelines that enforce document quality early. The validator reduces manual review time, improves reliability of templates, and helps teams maintain compliance across large document repositories.
Use cases include pre-submission validation of templates, automated checks in build processes, regulatory-compliance verification, and batch validation of archives before deployment. The tool supports incremental validation and can be integrated into automation scripts.