IIIF Validator

The IIIF Validator analyzes IIIF manifests and image services to verify conformance with IIIF specifications. It accepts a manifest URL or raw JSON and outputs a structured conformance report that highlights errors and warnings for rapid remediation. The tool is designed for librarians, repository developers, and QA engineers who publish or curate IIIF content and need reproducible validation results. It operates across IIIF versions and supports both manifests and image service descriptors.
Conceptually, validation proceeds by parsing the manifest tree, enforcing required fields, validating URIs, and performing schema checks against the appropriate IIIF version. It produces a machine-friendly JSON report suitable for CI, alongside a human-readable summary for manual inspection. Unique value lies in version-aware checks, clear diagnostics pointing to exact fields, and the ability to batch-validate multiple items in a single run.
Use cases include pre-publication QA, ingestion pipelines, and archival project pipelines where standards compliance and interoperability are critical. The tool helps teams reduce manual QA time and accelerates publish cycles by surfacing issues early.
Limitations include that it validates conformance rather than content quality or accessibility of media, and it does not automatically repair defects.