What does the response look like?

A conventional JSON envelope: success, status, data (a list or a single object) and a meta block with counts and pagination fields.

Can I simulate errors?

Yes. Pick a 4xx or 5xx status code and success flips to false automatically, so you can test error handling.

Does it work offline?

Yes. Responses are assembled entirely in your browser — nothing is uploaded.

Mock API Response Generator

Generate realistic REST API responses wrapped in a success / status / data / meta envelope, with configurable status codes. Built offline in your browser — no uploads.

Choose a resource and status, then press Generate to build a mock JSON API response.

ResourceStatusShape

Count

JSON response

About this tool

Generate realistic REST API responses wrapped in a success / status / data / meta envelope, with a configurable HTTP status code. Built offline in your browser — no uploads.

Common use cases

Stub an endpoint before the backend exists
Simulate a 4xx or 5xx error to test handling
Prototype a client against a realistic shape