JSON Generator
Generate mock JSON from JSON Schema examples.
JSON Generator
Generate mock JSON from a JSON Schema with json-schema-faker. Use it for API examples, frontend fixtures, and quick test data.
Schema support
- Objects, arrays, strings, numbers, booleans, and enums
- Required and optional properties
- Common formats such as email when supported by the generator
How to use JSON Generator
The JSON generator creates mock JSON from JSON Schema using json-schema-faker. It is useful for fixtures, API examples, and frontend demos.
Developers often use this page when they need json generator, json creator, json builder, and mock json generator.
Privacy and data handling
This generator creates values in the browser for testing, fixtures, and local development.
- Generated values are shown on the page and are not saved by the tool.
- Copy buttons use your browser clipboard permission when available.
- Review generated output before using it in production code or configuration.
Examples
Generate JSON from a schema
Input
{"type":"object","properties":{"id":{"type":"integer"}}}Output
{
"id": 42
}Mock values can vary because they are generated from the schema.
Steps
- 1Paste a JSON Schema.
- 2Review the generated JSON.
- 3Copy or download the output.
Common use cases
- Generate API response examples.
- Create frontend fixture data.
- Test UI states with schema-shaped data.
Practical tips
- Use realistic required fields in the schema.
- Generated data is mock data, not production data.
- Review generated values before using them in docs.
FAQ
Does it support JSON Schema?
Yes. It uses json-schema-faker to generate data from common JSON Schema definitions.
Will the output be the same every time?
Not always. Mock data can vary between generations.