OpenAPI Spec Viewer

Paste an OpenAPI 3.x or Swagger 2.0 spec (JSON or YAML) and get clean, browseable API docs. Endpoints grouped by tag, parameters and request bodies expanded, response schemas visible. Useful for reviewing an unfamiliar API or sharing docs without spinning up Swagger UI.

How to use the OpenAPI Spec Viewer

Paste the full spec. JSON loads directly; YAML is parsed via a small loader. The renderer groups endpoints by their first tag, shows method + path + summary on each row, and expands parameters and request/response schemas inline.