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Install guidePaste an OpenAPI/Swagger JSON spec to visualize your API endpoints.
Visualize OpenAPI/Swagger JSON specs to inspect endpoints, parameters, responses, and server metadata in one compact explorer.
It parses OpenAPI JSON input and renders API metadata and endpoint lists.
It groups endpoints by path and HTTP method with expandable detail panels.
It surfaces parameters, response codes, tags, and summaries for each operation.
It helps teams quickly validate spec readability without full doc tooling.
Spec input
{ "openapi": "3.0.3", "paths": { ... } }Endpoint sample
/pets GET and POST operations
Server block
"servers": [{ "url": "https://api.example.com" }]Explorer list
GET /pets, POST /pets, GET /pets/{petId}, DELETE /pets/{petId}Parameter view
petId (path, required) string
Response view
200 success description, 404 not found description
Spec parsing fails
Validate JSON syntax before pasting into viewer.
No endpoints shown
Ensure `paths` exists with supported HTTP method objects.
Unsupported method not displayed
Use standard REST methods recognized by the viewer.
Missing response detail
Add response descriptions in the source OpenAPI spec.
Large specs feel hard to navigate
Filter and split spec files by domain where possible.
OpenAPI Viewer should be treated as a repeatable validation step before merge, release, and handoff.
Can it read Swagger and OpenAPI JSON?
Yes, JSON specs from both styles are supported.
Does it execute API requests?
No, this page focuses on schema visualization.
Can I inspect parameters and responses quickly?
Yes, endpoint rows expand to show those details.
Is it a full API portal replacement?
Use it for lightweight review, not as a full documentation platform.
Can I clear and paste another spec rapidly?
Yes, input can be replaced and re-parsed instantly.