OpenAPI Viewer
Paste an OpenAPI 2.0 (Swagger) or 3.0 spec — JSON or YAML — and browse it as clean documentation. See the title/version/description, environments (servers), and every endpoint grouped by tag with method, path, summary, parameters, request body and responses. Filter by tag or text to find what you need fast.
How to use
- 1
Paste your spec
Drop an OpenAPI 3.x YAML/JSON document or a Swagger 2.0 JSON spec. Both are auto-detected.
- 2
Parse
Click Parse spec. The tool reads info, servers, tags, paths and components/schemas.
- 3
Browse endpoints
Filter by tag or free text. Each endpoint card shows method, path, summary, parameters, request body and responses.
- 4
Inspect schemas
Switch to the Schemas tab to see each named schema with its properties and types.
Common use cases
- Read a third-party API spec without setting up Swagger UI.
- Quickly find an endpoint by tag or path fragment during integration.
- Verify your own spec renders cleanly before publishing docs.
- Browse schemas to understand the shape of request and response bodies.
Limitations
- The tool renders documentation but does not send requests.
- $ref references inside schemas are resolved one level deep for display; deeply nested allOf/oneOf/anyOf are shown raw.
- Security schemes, callbacks and links are listed in the spec but not rendered as interactive UI.
- Specs larger than 1 MB are rejected to keep the tab responsive.
Frequently asked questions
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