📋 Swagger/OpenAPI Viewer

View, explore, and generate code from your API documentation

✨ JSON/YAML Support 🔍 Search Endpoints 💻 Code Snippets 📤 Export Options 🔒 No Data Stored

OR paste your spec below

Loading specification...

Total Endpoints

GET

POST

PUT

DELETE

API Title

v1.0.0

📡 Endpoints

❓ Frequently Asked Questions

What is OpenAPI/Swagger? +

OpenAPI (formerly known as Swagger) is an industry-standard specification for describing, producing, consuming, and visualizing RESTful web services. It provides a way to describe your API's structure in a format that both humans and machines can understand. The specification includes information about endpoints, request/response formats, authentication methods, and more.

What's the difference between OpenAPI 2.0 and 3.0? +

OpenAPI 3.0 introduced several improvements over 2.0 (Swagger):

• Simplified structure: Components section replaces definitions, parameters, responses
• Request body: Dedicated requestBody keyword instead of body parameters
• Multiple content types: Better support for different media types
• oneOf/anyOf/allOf: Enhanced schema composition
• Callbacks: Support for webhook-style async operations
• Links: Relationship links between operations

What file formats are supported? +

This viewer supports both JSON and YAML formats. You can paste your specification in either format, and the tool will automatically detect and parse it. You can also load specifications directly from a URL if your server allows CORS requests.

How do I create an OpenAPI specification? +

There are several ways to create an OpenAPI spec:

• Manual writing: Write JSON/YAML following the OpenAPI spec
• Swagger Editor: Use the official Swagger Editor for guided creation
• Code annotations: Use annotations in your code (like springdoc, swagger-jsdoc)
• API clients: Tools like Postman can export OpenAPI specs
• Auto-generation: Many frameworks auto-generate specs from your routes

Can I generate code from my API spec? +

Yes! This tool can generate code snippets in multiple languages (cURL, JavaScript, Python) for each endpoint. Click on any endpoint to expand it, and you'll see the code snippets section. For full SDK generation, you can use tools like OpenAPI Generator or Swagger Codegen.

Is my API specification data stored? +

No, absolutely not! All processing happens entirely in your browser. Your API specification is never sent to our servers and is not stored anywhere. This makes it safe to use even with sensitive or proprietary API documentation.

What are common use cases for OpenAPI/Swagger? +

• API Documentation: Generate interactive documentation for developers
• Client SDK Generation: Auto-generate SDKs in multiple languages
• API Testing: Create test cases from the spec
• Mock Servers: Generate mock servers for frontend development
• API Validation: Validate requests/responses against the spec
• Contract Testing: Ensure API implementation matches the spec

💡 About This Tool

Our Swagger/OpenAPI Viewer helps you visualize and explore API specifications. Simply paste your JSON or YAML spec or load it from a URL. Features include endpoint search, statistics overview, code snippet generation for cURL, JavaScript and Python, export to Markdown, and full support for both OpenAPI 2.0 (Swagger) and OpenAPI 3.0 specifications. All processing is done client-side - your data never leaves your browser.