Save scenario setups
Keep the sample JSON, response settings, and generated output in one workspace instead of rebuilding edge cases each time.
API Response Mock Generator
A browser-native workspace for API mock responses
Save, resume, and share mock-response workspaces that keep sample JSON, scenario settings, and generated output together.
Runs locally, auto-saves your mock workspace, and lets you reopen or share frontend response states without a backend.
Runs locally • Saves automatically • Share via link
Browser-native
Auto-save
Shareable workspace
No login
Why it matters
Frontend edge cases are easier to ship when the mock response, output, and scenario settings stay in one workspace you can save, reopen, and share.
Live mock studio
Generate the payload before you build the edge case.
Generate sample API response mocks and inspect JSON output before wiring frontend states.
SuccessPartialPaginated
{
"data": [
{
"id": "usr_1042",
"name": "Maya Thompson",
"email": "maya.28@example.com"
}
],
"meta": {
"page": 1,
"total": 24
}
}Response summary
Scenario: Success
Status code: 200
Items: 6
Top-level keys: data, meta
Keep one sample JSON response, then generate the scenarios your frontend needs to survive.
Resume edge cases
Return to success, empty, unauthorized, and paginated states later without recreating the mock flow.
Share frontend states
Send the same mock workspace when someone else needs the generated response shape for UI review or testing.
Mock-response workspace for frontend testing
Save, resume, and share mock-response workspaces that keep sample JSON, scenario settings, and generated output together.
Why use it
Why generate mock API responses
Keep one sample response and multiple scenario settings in a saved workspace instead of recreating edge cases each time.
Return to empty, error, auth, pagination, and partial-data states later without rebuilding the mock setup.
Share a mock workspace with teammates so they can inspect or reuse the same generated response states.
Copy fake API response data into fixtures, Storybook stories, demos, or frontend tests once the workspace is ready.
How it works
How mock API data is generated
1 Start instantly by pasting a representative API response.
2 Adjust scenarios in a workspace that auto-saves the sample, settings, and generated output.
3 Share the workspace or reopen it later before copying JSON into fixtures, demos, or tests.
Use cases
API mock data use cases
Save a UI prototype workspace before the backend endpoint is ready.Revisit empty table, dashboard, and recovery-state mocks later without regenerating from scratch.Share unauthorized, validation error, or rate-limit response workspaces with the team.Build and iterate on paginated mock data for lists and search screens across sessions.Keep Storybook or demo fixtures tied to the sample JSON workspace that produced them.
FAQ
Mock API generator questions
What is a mock API response generator?
It turns sample JSON into realistic response variants so frontend work can test success, empty, error, auth, and pagination states.
Does my work get saved?
Yes. The mock-response workspace is saved locally in the browser so you can reopen the same sample JSON and scenario settings later.
Can I share my workspace?
Yes. Share links reopen the same mock workspace so collaborators can generate or review the exact response states.
Can I generate fake API responses from JSON?
Yes. Paste a sample success response and choose the scenario you want the generator to create.
Can I mock API responses before the backend is ready?
Yes. You can create believable payloads for prototypes, demos, frontend tests, and UI state validation.
Can it create error and empty responses?
Yes. It can generate empty, partial, error, unauthorized, rate-limited, and paginated variants.
Does it run locally?
Yes. The sample payload and generated output stay in the browser.