Mock API Generator - Instant API Endpoints
Create instant mock API endpoints from JSON. Perfect for frontend development, testing, and prototyping. Supports latency simulation and error responses.
Input
JSONOutput
API EndpointYour converted output will appear here
How to Use Mock API Generator - Instant API Endpoints
Paste your desired JSON response. We generate a unique URL that returns your JSON. Use query params to simulate delays or errors.
🔒 Privacy First: This tool runs entirely in your browser. Your data never leaves your computer.
Common Use Cases
- Test frontend without a real backend
- Prototype API integrations quickly
- Simulate slow network conditions
- Test error handling in your app
Mock API Generator - Instant API Endpoints FAQ
Paste your JSON, click Generate, and get a live URL that returns your JSON. The URL works for 24 hours with up to 5 API calls.
Yes! Add ?delay=2000 to your URL to add a 2 second delay. Great for testing loading states.
Yes! Add ?error=500 to simulate server errors, or ?error=404 for not found. Test your app's error handling easily.
Each mock endpoint allows 5 API calls, then expires. This prevents abuse while giving you enough for testing.