OpenAPI / JSON Schema Validator
Processed locallyValidate OpenAPI 3 and JSON Schema documents. JSON and YAML support.
About OpenAPI / JSON Schema Validator
The OpenAPI / JSON Schema Validator validates OpenAPI 3.0/3.1 and JSON Schema documents. Paste JSON or YAML. Resolves internal $ref references. Errors are listed with paths—click to understand what needs fixing. Use for API specs, CI/CD validation, and documentation pipelines. Ensure your OpenAPI documents are valid before generating clients or publishing docs. Standalone JSON Schema validation is also supported (Draft-04 through 2020-12). All validation runs locally. No data is sent to external services.