OpenAPI Validator

The tool validates OpenAPI schemas (JSON or YAML) to ensure conformance with the OpenAPI Specification. It parses the input, validates core sections such as openapi, info, and paths, as well as components, schemas, parameters, responses, and security schemes. It resolves $ref references when requested and reports precise locations for errors. It is useful for API developers, QA engineers, and API program managers who need quick white-box validation before integration, code generation, or client SDK creation. Unique value lies in real-time feedback, support for multiple OpenAPI versions, and a structured error model that supports downstream tooling. Core features include syntax validation, structural checks, reference resolution, optional strict mode, and exportable reports. Use cases include validating a new spec, checking diffs between versions, or validating an imported spec from a repository. The tool focuses on contract quality, not runtime behavior, ensuring that the specification itself is machine-readable and consistent across tools.