Test APIs with Fake JSON Data
Simulate API testing with our free Dummy API tool. Generate JSON data for development.
User management endpoints with profile data, statistics, and user information
Returns detailed user profile information
Product catalog endpoints with inventory, categories, and pricing data
Returns product catalog with prices and details
Returns available product categories
Create Your Own API & JSON Instantly
Want to generate custom JSON data or build your own API endpoint in seconds? Try our AI JSON Generator to create, edit, and publish JSON using the power of AI. Perfect for developers, testers, and anyone who needs quick, reliable JSON for prototyping, testing, or learning.
Go to AI JSON GeneratorOrder management endpoints with transaction history and order analytics
Returns sales analytics and metrics
System monitoring endpoints for health checks, configuration, and status
JavaScript Fetch
fetch('https://formatjsononline.com/api/users')
.then(response => response.json())
.then(data => console.log(data));cURL Command
curl -X GET "https://formatjsononline.com/api/users" \ -H "Accept: application/json"
Why Use Our Free API Endpoints?
Start testing immediately without registration, API keys, or authentication. Perfect for learning and prototyping.
Get realistic, well-structured JSON data that follows REST API best practices and industry standards.
Test directly from your browser or web applications without CORS restrictions. Perfect for frontend development.
Frequently Asked Questions
Are these real working API endpoints?
Yes! These are fully functional REST API endpoints that return real JSON data. You can make GET requests to any of these URLs right now and receive immediate JSON responses. Perfect for testing your applications, learning API integration, or prototyping frontend applications.
How do I test these API endpoints?
You can test these endpoints in multiple ways: directly in your browser by visiting the URLs, using API testing tools like Postman or Insomnia, with curl commands in your terminal, or by making fetch requests in your JavaScript applications. All endpoints support CORS for browser-based testing.
What data do these APIs return?
Our APIs return realistic sample data including user profiles with names and emails, product catalogs with prices and categories, order histories with timestamps, analytics data with charts and metrics, and system health information. All responses follow standard REST API patterns.
Can I use these APIs in production?
These APIs are designed for development, testing, and learning purposes. While they're reliable for prototyping and frontend development, for production applications you should implement your own backend APIs with proper authentication, data validation, and business logic.
Do these APIs require authentication?
No authentication is required for these test endpoints. They're completely open and free to use. This makes them perfect for learning API integration, testing frontend applications, and demonstrating API concepts without the complexity of authentication flows.
What HTTP methods are supported?
Currently, these endpoints support GET requests for retrieving data. This covers the most common use case for API testing and frontend development. The responses include proper HTTP status codes and follow RESTful conventions for resource naming and structure.
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API Tester
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Download JSON
Generate and download JSON files with exact sizes (Bytes, KB, MB). Perfect for testing API limits, uploads, and performance. Client-side only for privacy.
Ai JSON Generator
Describe data in plain English and our free AI JSON Generator creates valid JSON instantly. Perfect for generating mock data, API responses, and learning JSON structure.