API Mock Data Generator

Generate realistic mock data for API development, testing, and prototyping. Define your schema and generate JSON data with various data types.

Design your data schema using the visual editor or write JSON directly. Then generate mock data based on your schema.

Schema Designer

JSON Editor

Import JSON Example

Schema Definition (JSON):

Paste JSON Example:

Paste a sample JSON object or array to automatically generate a schema.

If JSON is an array:

Detection depth:

Maximum nesting level for schema detection

Number of items:

Output format: