OpenAPI Validator
Validates OpenAPI 3.0 / 3.1 YAML or JSON documents.
OpenAPI Input
Result
What is OpenAPI Validator?
OpenAPI Validator checks OpenAPI 3.0 and 3.1 documents written in JSON or YAML for structural and syntax problems. It helps API teams catch broken references, misplaced fields, and malformed operations before generating documentation, clients, tests, or gateway configuration from the specification.
How to use OpenAPI Validator
Paste an OpenAPI 3.0 or 3.1 document in JSON or YAML and run validation to identify syntax or specification issues.
When is OpenAPI Validator useful?
OpenAPI Validator is useful when checking an API contract before documentation generation, client generation, CI/CD validation, or backend integration.
Example
A practical example is validating an OpenAPI YAML file after adding a new endpoint and response schema.
Practical notes
A structurally valid specification can still disagree with the running API. Validate representative requests and responses, resolve every reference in the deployment environment, and review authentication, error schemas, required fields, examples, and version compatibility manually.