API Response Mock Generator
Create realistic mock JSON responses for frontend prototypes, API docs, and test fixtures.
Mock an API before the backend is ready
Frontend work often starts before the final API exists. This generator creates predictable JSON response shapes from a simple field list, so designers and developers can build against realistic data instead of empty placeholders.
Use list mode for tables, single item mode for detail screens, and error mode for empty or failed states.
Local mock data
No API schema or sample data is uploaded.
Frequently Asked Questions
What does this mock generator create?
It creates a JSON response envelope with status, message, data, pagination, and error options for prototyping.
Does it call an API?
No. It generates static mock JSON locally.
Can I change the fields?
Yes. Enter field names and types, then copy the generated JSON.
Is anything uploaded?
No. The mock response is generated in your browser.
Build and debug faster with practical browser utilities.