What is a JSON Generator?
A JSON Generator from Schema creates realistic sample JSON data based on field definitions you provide. Instead of manually writing test data, you define the schema (field names, types, and formats), and the tool generates properly structured JSON output instantly.
How to Use This Tool
- Add Fields: Click "+ Add Field" to define each property with a key name and data type.
- Choose Types: Select from String (with formats like name, email, phone, URL, date), Number (with min/max range), Boolean, or Array.
- Set Quantity: Choose how many JSON objects to generate in the array.
- Generate: Click "Generate JSON" to create the output, then copy or download it.
Use Cases
- API Mocking: Generate fake API responses for frontend development.
- Database Seeding: Create test records for new database schemas.
- Unit Testing: Produce test fixtures with realistic data patterns.
Frequently Asked Questions
What JSON formats can I generate?
You can generate String (names, emails, phones, URLs, dates, lorem text), Number (with min/max ranges), Boolean, and Array types.
Is there a limit on the number of records?
You can generate up to 50 records at once using the array length control.
Can I save the schema for reuse?
Currently schemas are session-based. Use the "Load Sample Schema" button to quickly set up common field patterns.