# OpenAPI Viewer

Read an OpenAPI or Swagger document and list its operations, parameters and responses.

- Category: Web (web)
- URL: https://ilham.dev/tools/openapi-viewer/
- Documentation: https://ilham.dev/tools/openapi-viewer/index.md
- Keywords: openapi, swagger, api, specification, endpoints, schema, rest, documentation, viewer, yaml

## Example questions

- Does it fetch my specification from a URL?
- Which versions are supported?
- How deep does a schema go?

## Properties

- Runs in the browser
- No login required
- No data uploaded


## About

Paste an OpenAPI or Swagger document and read it as a list of operations rather than as a wall of YAML. Each endpoint shows its method, its parameters, its request body and the responses it can return, with references resolved so a schema appears where it is used.


## Questions

### Does it fetch my specification from a URL?

No. The document is read as text in the page, and a reference to another file is shown as a reference rather than followed. That keeps the page working offline and keeps a private spec private.

### Which versions are supported?

OpenAPI 3.0 and 3.1 as well as Swagger 2.0. The overview writes down which one it found, and a Swagger 2 document's host, basePath and schemes are shown as the server.

### How deep does a schema go?

Nested objects are expanded a couple of levels and then summarised as object, so one schema cannot flood the page. The shape is still clear, and the full definition is in the document you pasted.