OpenAPI / Swagger Viewer

Displays OpenAPI 3.x YAML/JSON as readable documentation.

OpenAPI YAML / JSON

Documentation

What is the OpenAPI / Swagger Viewer?

The OpenAPI / Swagger Viewer converts OpenAPI 3.x YAML or JSON files into clean, readable API documentation. Developers can paste any specification and instantly view endpoints, methods, parameters, request bodies and responses in a structured layout. The viewer supports all common HTTP methods and highlights summaries, descriptions and schema details. All rendering runs fully client‑side using js-yaml, ensuring privacy and instant performance. A fast and convenient way to inspect OpenAPI files without hosting Swagger UI or running external tools.