JSON to OpenAPI Generator

Generate OpenAPI 3.0 specifications from JSON examples. Create comprehensive REST API documentation with schemas, endpoints, and examples automatically.

JSON Example Data

Paste your JSON response example

🔧 All JSON Tools

🔧 API Configuration

API Title

Version

Description

Server URL

Output Format

🛣️ API Endpoints

OpenAPI Specification

Generated OpenAPI 3.0 spec

Features

📋 Generate OpenAPI 3.0 specifications from JSON examples
🛣️ Support for multiple HTTP methods (GET, POST, PUT, DELETE, PATCH)
📊 Automatic schema inference from JSON data
🔧 Configurable API metadata (title, version, description, server URL)
📄 Output in YAML or JSON format
✅ Built-in validation for generated specs
📱 Mobile-responsive interface
🔒 Privacy-focused: no data sent to servers
⚡ Real-time spec generation
💾 Download specs in multiple formats