HTTP 200 OK Mock
Generate a mock HTTP 200 OK JSON response instantly — realistic success payloads for stubs and API tests. Free, client-side mock API generator.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
Common Use Cases
Stubbing API endpoints
Drop a realistic success body into MSW handlers, fetch mocks, or Postman examples while the real backend is unfinished.
Documentation examples
Show a canonical success response shape in API docs and onboarding guides.
Frequently Asked Questions
- What does the mock response contain?
- A JSON body with status 200, a success message, and a small data object including a random id — the shape most REST APIs return, ready to paste into API mocks, tests, or documentation.
- How do I use this with my test framework?
- Drop the JSON into fetch-mock, MSW handlers, Postman example responses, or fixture files. The random id per generation helps avoid tests accidentally coupling to a hard-coded value.
- When should I mock a 200 instead of calling the real API?
- Whenever the test is about your code rather than the provider's. A mock removes network latency, rate limits, credentials and outages from the equation, so a failure means your parsing or error handling broke rather than someone else's service. Keep a small number of real calls as a separate contract test.
- What Content-Type should I serve alongside this body?
- application/json. Clients decide how to parse a body from the header rather than by inspecting it, so returning JSON under text/plain will make many HTTP libraries hand you a string instead of an object. The MIME Type Lookup has the correct value for other body formats.
- How do I mock a failure instead of a success?
- Change the status line and keep the shape of your error payload consistent with what the real API returns. The HTTP Status Code Lookup covers which code fits which failure — the common mistake is returning 400 for a well-formed request that failed validation, where 422 is the accurate code.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.