OpenAPI snippet validator
Paste an OpenAPI 3.x or Swagger 2.0 document (JSON or YAML). Structural validation for info, paths, operations, and responses—remote $refs are not resolved. Runs only in this tab.
Frequently asked questions
No. Your OpenAPI document is validated only in this tab. Nothing is sent to LocalTools servers for processing.
No—this is a subset structural validator. Bundle or inline external references before pasting, or use a full OpenAPI linter for complete $ref resolution.
OpenAPI 3.x (openapi: 3.x.y) and Swagger 2.0 (swagger: "2.0") JSON or YAML snippets.