Paste your OpenAPI/Swagger specification (JSON or YAML), or drag and drop a file.
📂 Drag and drop JSON/YAML file here
Or click the button below to select a file
OpenAPI Specification (OAS, formerly Swagger Specification) is an open standard under the Linux Foundation for describing RESTful API interfaces. It uses JSON or YAML format to define complete information about API endpoint paths, HTTP methods, request parameters, request bodies, response formats, and security authentication, making API documentation machine-readable and automatically processable.
openapi: "3.x.x", Swagger 2.0 uses swagger: "2.0"requestBody, Swagger 2.0 uses parameters with in: bodycomponents, Swagger 2.0 uses definitionscomponents/securitySchemes, Swagger 2.0 uses securityDefinitionsoneOf/anyOf/allOf compositioncallbacks and links supportOpenAPI Specification (OAS, formerly Swagger Specification) is a standardized format for describing RESTful APIs. It uses JSON or YAML syntax to define API endpoints, request parameters, response formats, authentication methods, and more, making API documentation machine-readable and enabling automatic client code generation.
OpenAPI 3.x is the successor to Swagger 2.0. Key differences: 1) Uses openapi field instead of swagger; 2) Supports oneOf/anyOf/allOf composition schemas; 3) Improved security definitions with components/securitySchemes; 4) Supports callbacks and links; 5) Uses requestBody instead of body parameters.
This tool automatically detects and parses OpenAPI/Swagger specification files, checks JSON/YAML syntax correctness, verifies required fields (openapi/swagger, info, paths), and highlights missing or malformed sections.
Both JSON and YAML formats are supported. You can paste content directly, drag and drop files, or import via URL. Supports OpenAPI 3.0.x, 3.1.x, and Swagger 2.0 versions.
No. All OpenAPI specification parsing and visualization happens locally in your browser. Your API specification content is never sent to any server, ensuring your API design security.
Paste your OpenAPI specification content into the input area or drag and drop a file. The tool will automatically parse and display all API endpoints in a tree structure. Click any endpoint to view detailed request parameters, response formats, and example data.