What types of JSON can I generate?

You can generate JSON with strings, numbers, booleans, null values, arrays, and nested objects based on templates.

Can I generate random test data?

Yes, the tool can generate random data based on field type patterns (names, emails, numbers, dates).

Is the generated JSON valid?

Yes, the tool always generates valid JSON that conforms to the JSON specification.

JSON Generator - Online Schema-Based Generation

How to Use

Paste the JSON Schema definition into the left input box.
Click the "Generate JSON" button.
The sample JSON data generated from the Schema appears on the right.

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About JSON Generator

JSON Generator is a free online tool that automatically generates sample JSON data conforming to Schema specifications from JSON Schema definitions. In API development and testing, we often need to create test data that conforms to specific schemas.

Simply enter a JSON Schema definition and the tool will automatically analyze the Schema structure and generate the corresponding sample JSON data. Supports all JSON Schema types including strings, numbers, booleans, arrays, and nested objects. The entire generation process runs locally in the browser without uploading data to any server.