🧩 Mock JSON Data Generator

Primarily for frontend development testing: 1) Mock API response data during frontend-backend separation development; 2) Provide test data for UI components; 3) Stress testing and performance testing; 4) Generate fake data for demos; 5) Create example data for API documentation. Define field types and rules to quickly generate JSON data of any structure.

Supports multiple field types: string, integer, number (float), boolean, array, object (nested), and enum. Generation rules include: custom field names, default values, min/max values, array length, enum options, and required flags. Supports unlimited nesting of objects.

Yes. Set the 'Record Count' parameter (1-100) to generate multiple independent records at once. Each record will have different random field values, perfect for simulating multiple users, orders, products, etc. Output is in JSON array format for easy integration with your development workflow.

Absolutely not. This tool runs entirely in your browser. All JSON generation and mock data processing happens locally on your device. No registration required, no data uploaded, and your API test data stays only in your browser.

Of course. The generated JSON conforms to standard JSON specifications and can be directly copied into project code, API documentation, Postman, or curl tests. Supports one-click copy of formatted JSON and download as .json file. Mock data includes random values for realistic API response simulation.

The tool uses a simple, intuitive form-based configuration approach. Add fields, select types, and configure rules to build your schema — no need to write complex JSON Schema standard format. Quick preset templates (User API, Product List, etc.) are available to help you get started fast.