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Online JSON Dataset Generator

Generate JSON datasets as a plain array of objects with customizable field names, value types, and record counts.

Quick Options (Rows):
Field name Type Options
Also updates available contact fields
Field separator
Output size
Max 25
Max 10
Max 10

Sample output structure

[
  { "id": 1, "name": "John" }
]

Quick use cases

Create mock records for application and API testing. Prepare fixtures for frontend and backend development. Test JSON parsing, validation, and data-import workflows.

Common generator issues

A consumer expects an object wrapper instead of a plain array. Generated value types do not match the target schema. Required field names differ from the configured output.

Generator feature notes

  • Set a property name and value type for each field.
  • Generate flat objects inside a single JSON array.
  • Copy the result or download it as a JSON file.

Feature boundaries

Generate up to 5,000 objects per file. Use up to 25 fields and 10 files per run. The output is a plain array without an automatic wrapper object.

Related tools

Inspect generated payloads with JSON Viewer before handing data to frontend or backend tests.

For tabular QA scenarios, transform output using JSON to CSV.

Dataset generator FAQ

What structure does the JSON generator produce?

It produces a plain JSON array containing one flat object for each generated record.

Can I control JSON property names and types?

Yes. Each field can have a custom property name and a selected value type.

Does the generator add a wrapper such as users or records?

No. The generated output is a plain array of objects without an additional wrapper property.