OpenAPI / Swagger Spec Validator
OpenAPI validator online for OpenAPI 3.x and Swagger 2.0 specs. Paste YAML or JSON.
OpenAPI / Swagger Spec Validator
Paste your OpenAPI 3.x or Swagger 2.0 spec (YAML or JSON), then click Validate. The tool checks required structure and reports errors with path and message. For building HTTP requests, use the HTTP Request Builder; for status codes see HTTP Status Code Lookup.
Use cases
- API docs – Validate spec before publishing
- CI / pre-commit – Quick structure check
- Learning – Verify required fields (info, paths)
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