About Swagger Viewer
This tool loads and parses OpenAPI/Swagger specs so you can inspect API structure, review parameters, and send test requests from the same page.
Core Features
- Multiple input modes: load from URL or paste raw JSON/YAML content.
- Spec overview: show API metadata, version, path count, and operation count.
- Endpoint browser: inspect method/path details, params, and request body schema.
- Built-in test panel: fill path/query/header/body values and send requests.
- Response inspector: view status and payload for quick troubleshooting.
How To Use
- Choose an input mode and load your OpenAPI/Swagger document.
- Pick an endpoint from the list and review its requirements.
- Fill request data in the test panel and send.
- Validate response and iterate based on results.
Typical Use Cases
- API alignment between front-end and back-end teams.
- Fast endpoint sanity checks by QA.
- Onboarding developers into an existing service API.
FAQ
Why does URL import fail?
Typical causes include CORS restrictions, unreachable URLs, or invalid spec format. Try paste mode to isolate the issue.
Why does request testing fail after successful parsing?
Parsing only validates the spec file. Verify base URL, auth headers, and required params for the runtime environment.