JSON Generator

Create Random JSON Data from Schema

Maximum allowed items: 50

Enter a JSON Schemajson
Generated JSON Outputjson

The JSON Generator on jsonmaster.com helps you generate random JSON objects from a simple schema. This is extremely useful for creating mock API responses, test data, sample user objects, fake product catalogs, or structured demo data for applications.

Just define your JSON schema using field types like string, number, boolean, email, uuid, name, phone, date, city, or country, and the generator instantly creates valid random JSON.

How to Use the JSON Generator

  1. Define your JSON schema in the left editor. Example:
    {
  "name": "string",
  "age": "number",
  "email": "email",
  "isActive": "boolean"
}
  2. Enter the number of JSON objects you want to generate (1–50 recommended for performance).
  3. Click Generate JSON. The tool will instantly produce random JSON data based on your schema.
  4. Copy or export your generated JSON for use in mock APIs, testing environments, UI prototyping, or development workflows.