OpenAPI to TypeScript Types Generator

Turn your OpenAPI or Swagger schemas into TypeScript interfaces with JSDoc — copy or download api-types.ts.

Open an OpenAPI or Swagger spec

OpenAPI 3.0 / 3.1 and Swagger 2.0 · JSON or YAML · up to 25 MB · parsed in your browser

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Help shape OpenAPI to TypeScript Types Generator

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Every entry in components.schemas (OpenAPI 3) or definitions (Swagger 2), with $refs turned into type names.

oneOf and anyOf become union types; allOf becomes an intersection.

It generates types only. Pair them with fetch, or open endpoints in the API client to generate request code.

No. Parsing and generation happen entirely in your browser.