Free API Response Simulator — Mock HTTP Responses Online
When you're building an app's screen but the real server isn't ready, you “mock” the API — you fake the response the server would send so the front-end can be built and tested now. This tool lets you craft that response: choose the status code, headers, and body, and see how your code would handle it. It's a fast way to unblock development and test edge cases (errors, empty results) on demand.
Frequently Asked Questions
- Does the simulator make real HTTP requests?
- No — it simulates the response locally in your browser. No requests are made to external servers.
- What can I use this for?
- Frontend development and testing: mock an API that does not exist yet, test error-handling code with different status codes, or document API response shapes.