Sample OpenAPI/Swagger Specification
Generate sample OpenAPI 3.0/3.1 specification files for REST API documentation
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Muestras Listas para Descargar
Descarga archivos de muestra pre-construidos al instante. Sin configuración.
Minimal API Spec
Basic OpenAPI 3.0 specification (~1 KB)
BasicREST API - Basic
Basic REST API with CRUD operations (~3 KB)
RESTREST API - With Authentication
REST API with OAuth2 authentication (~5 KB)
RESTREST API - Complete
Full REST API with all HTTP methods (~10 KB)
RESTE-commerce API
Complete e-commerce API specification (~15 KB)
E-commerceSocial Media API
Social platform API with posts, users, comments (~20 KB)
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Generate OpenAPI/Swagger specifications for your REST APIs. Create comprehensive API documentation with endpoints, schemas, authentication, and examples.
What is OpenAPI Specification?
OpenAPI Specification (formerly Swagger Specification) is a standard, language-agnostic format for describing RESTful APIs. Written in YAML or JSON, it defines all aspects of your API: available endpoints, request/response formats, authentication methods, parameters, error codes, and data schemas. OpenAPI specs are machine-readable, enabling tools to automatically generate interactive documentation (Swagger UI, ReDoc), client SDKs in multiple languages, server stubs, and API testing tools. Version 3.1.0 is the latest, offering full JSON Schema compatibility. OpenAPI has become the industry standard for API design-first development, adopted by major companies and integrated into API gateways, development tools, and CI/CD pipelines.
Why Use Our OpenAPI Generator?
Start with a valid OpenAPI 3.0 or 3.1 specification template
Define multiple API endpoints with paths, methods, parameters, and responses
Create reusable schemas for request/response bodies and data models
Configure authentication methods (API Key, Bearer Token, OAuth2)
Generate interactive API documentation compatible with Swagger UI and ReDoc
Export to YAML (human-readable) or JSON (machine-readable) formats
Include example values for better documentation clarity
Free to use with unlimited spec generation and no signup required
Common Use Cases
API Documentation
Create comprehensive, interactive API documentation that developers can read and test directly in the browser. Use Swagger UI or ReDoc to render your OpenAPI spec as beautiful, searchable documentation with a "Try it out" feature for testing endpoints.
API Design-First Development
Design your API contract before writing code. Define endpoints, request/response schemas, and error codes in OpenAPI. Share with frontend and backend teams for parallel development. Validate designs early and iterate quickly without costly code changes.
Client SDK Generation
Use OpenAPI Generator or Swagger Codegen to automatically generate client libraries in TypeScript, Python, Java, Go, Ruby, PHP, and 40+ other languages. Save weeks of client development time and ensure API consistency across platforms.
API Testing and Validation
Import OpenAPI specs into Postman, Insomnia, or automated testing tools. Generate test cases based on defined schemas, validate responses against specifications, and ensure API implementations match the documented contract.
Generator Features
Support for OpenAPI 3.0.3 and 3.1.0 specifications
Define multiple endpoints with GET, POST, PUT, DELETE, PATCH methods
Configurable authentication: API Key (header/query), Bearer Token, OAuth2 flows
Schema builder for request/response body definitions with JSON Schema support
Parameter definitions: path parameters, query strings, headers, cookies
Response definitions with status codes, descriptions, and example values
Reusable components for schemas, parameters, responses, and security schemes
Export to YAML or JSON with proper formatting and validation
Cómo Funciona
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Preguntas Frecuentes
What is OpenAPI Specification?
OpenAPI Specification (formerly Swagger) is a standard format for describing REST APIs. It allows you to define endpoints, request/response formats, authentication, and more in a machine-readable format (YAML or JSON). Tools can then generate documentation, client SDKs, and server stubs from this specification.
What is the difference between OpenAPI and Swagger?
Swagger was the original name of the specification. In 2016, it was donated to the OpenAPI Initiative and renamed to OpenAPI Specification. Swagger now refers to the tools (Swagger UI, Swagger Editor, etc.) while OpenAPI refers to the specification format itself.
Should I use OpenAPI 3.0 or 3.1?
OpenAPI 3.1.0 is the latest version and is fully compatible with JSON Schema, offering more flexibility. However, 3.0.3 has wider tool support. Use 3.1.0 for new projects if your tools support it; otherwise, 3.0.3 is a safe choice with broad compatibility.
Can I use this OpenAPI file with Swagger UI?
Yes! The generated OpenAPI specification is fully compatible with Swagger UI, ReDoc, and other documentation tools. Simply load the YAML or JSON file to generate interactive API documentation.
How do I validate my OpenAPI specification?
You can validate your OpenAPI spec using tools like Swagger Editor, OpenAPI Generator CLI, or online validators. These tools check for syntax errors, missing required fields, and schema compliance.