OpenAPI & Swagger tools
Validate specs, diff versions and generate clients from an OpenAPI document.
OpenAPI ValidatorValidate an OpenAPI 3.0 or 3.1 document and get every structural error located by JSON Pointer, with unresolved references reported rather than skipped.Swagger & OpenAPI FormatterConvert an OpenAPI or Swagger file between YAML and JSON, sort its paths and schemas, and put every key back into specification order.OpenAPI Diff CheckerCompare two OpenAPI versions and see which changes actually break existing clients, with the reason for every verdict spelled out.OpenAPI TypeScript Client GeneratorTurn an OpenAPI 3 document into a typed TypeScript fetch client with no dependencies — and see exactly which parts the spec left too vague to type.OpenAPI Mock Server GeneratorGenerate example responses from an OpenAPI spec and export a mock you run locally — MSW handlers, an Express server or plain fixtures. Reproducible from a seed.