OpenAPI YAML Validator — Spec Linter Online
Validate OpenAPI 3.x and Swagger 2.0 YAML specs for openapi/swagger version, info.title, info.version, and paths.
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OpenAPI / Swagger YAML
OpenAPI structural checks
Paste an OpenAPI 3.x or Swagger 2.0 YAML spec to validate info, paths, and version fields.
About this tool
OpenAPI 3Swagger 2paths checkinfo blockPrivate
How to use
- Paste your openapi.yaml or swagger spec.
- Required top-level fields are validated.
- Ensure paths: has at least one route.
- Export to JSON with YAML to JSON if needed.
Examples
Minimal OpenAPI 3
openapi: 3.0.0 info: title: API version: 1.0.0 paths: /:
Structural checks passed