What should I use to generate API documentation from Swagger?

If you already have a Swagger/OpenAPI spec, the best tool depends on the kind of documentation you want:

Good options

• Swagger UI

  • Best for: interactive API docs and testing endpoints in the browser
  • Shows endpoint list, request/response models, and lets users “try it out”

• Redoc

  • Best for: clean, readable, polished reference docs
  • Great when you want documentation that looks more like a product manual than a test console

• OpenAPI Generator

  • Best for: generating client SDKs, server stubs, and sometimes docs
  • More useful if you also want code generation, not just documentation

• ReDocly / SwaggerHub

  • Best for: hosted documentation platforms and team workflows
  • Useful if you want collaboration, versioning, and publishing built in

Quick recommendation

• If you want interactive docs: use Swagger UI
• If you want nice-looking published docs: use Redoc
• If you want docs plus code generation: use OpenAPI Generator

Important note

“Swagger” is now usually referred to as OpenAPI. Most modern tools use the OpenAPI spec directly.

If you want, I can also recommend the best tool for your stack (Node, Python, Java, .NET, etc.).