OpenAPI / Swagger Viewer

Paste an OpenAPI 3.x JSON or YAML document to browse endpoints, parameters, request bodies and responses. Build example request URLs without sending API calls.

How to Use OpenAPI Viewer

1. Paste your OpenAPI 3.x JSON or YAML specification into the Input textarea, or click Example Spec to load a sample Petstore API
2. Click Parse & View to render the API documentation — title, version, endpoints grouped by tag, with method color badges (GET green, POST blue, PUT orange, DELETE red)
3. Click an endpoint to expand details (parameters table, request body schema, responses). Use Copy as cURL to generate curl commands, or Try It to construct request URLs with your own parameter values

Enable JavaScript to use these tools.