OpenAPI Viewer
Paste OpenAPI 3.x or Swagger 2.x JSON/YAML. Explore endpoints, parameters, and responses locally.
OpenAPI Spec (JSON or YAML)
OpenAPI & Swagger Spec Viewer
Paste any OpenAPI 3.x or Swagger 2.x spec (JSON or YAML) to get a clean, browseable documentation view. Endpoints are grouped by tag, searchable, and expandable to show parameters, request bodies, and response codes — all parsed locally.
Frequently Asked Questions
- Which OpenAPI versions are supported?
- The viewer supports OpenAPI 3.x (OAS3) and Swagger 2.x specifications in both JSON and YAML formats.
- Is my API spec uploaded to a server?
- No. Parsing happens entirely in your browser using js-yaml for YAML parsing. Your spec never leaves your device.
- Does this render interactive API calls?
- The viewer focuses on readable documentation — endpoints, parameters, request bodies, and responses. For interactive testing, use the API Request Builder tool.
- Can I search for specific endpoints?
- Yes. Use the search bar to filter endpoints by path, HTTP method, summary text, or tag.