openapi-generator

You can generate OpenAPI specifications by scanning your Express, Next.js, Fastify, or NestJS API routes. This process automatically extracts TypeScript types and parses JSDoc to create complete schemas, examples, and documentation for your API.

Yes, Swagger documentation is created by converting TypeScript types and parsing JSDoc metadata from your existing API routes. It produces an OpenAPI 3.0 or 3.1 specification file that can be directly imported into Swagger UI.

Yes, openapi-generator supports Fastify and Next.js frameworks, alongside Express and NestJS. It analyzes your API route definitions across these frameworks to automatically generate comprehensive OpenAPI 3.0/3.1 specifications.

The best way to automate API documentation is generating OpenAPI specs directly from your TypeScript codebase. By extracting schemas and parsing JSDoc route metadata, it eliminates manual documentation and ensures your API spec remains accurate.

Yes, the generated OpenAPI 3.0/3.1 specifications can be imported into Postman or Insomnia. The output file contains complete schemas and examples, making it immediately compatible with these API testing platforms.

TypeScript type conversion works by automatically extracting type definitions from your API codebase and translating them into OpenAPI schemas. This ensures your generated API documentation accurately reflects your code's data structures and route parameters.