OpenAPI Validator
Validates OpenAPI 3.0 / 3.1 YAML or JSON documents.
OpenAPI Input
Result
What is the OpenAPI Validator?
The OpenAPI Validator checks OpenAPI 3.0 and 3.1 documents for structural and syntactic validity.
Developers can paste JSON or YAML specifications and instantly verify whether the required fields
such as openapi, paths, and components are present. The tool
detects malformed JSON, incorrect YAML formatting and missing top‑level fields, making it ideal
for API development, documentation workflows and backend engineering. All validation runs fully
client‑side, ensuring privacy and immediate performance. A fast and reliable way to validate
OpenAPI specs without external services or CLI tools.