JSON Generator

Your data never leaves your browser

Generate random JSON data for testing and development.

Options

Brie — Bug Reporting Tool

Debugging JSON responses?

Brie captures console logs, network requests, and session replays automatically — so you can see the exact API response that caused the bug.

Install Brie — It's FreeLearn more →

About JSON Generator

Generate realistic random JSON objects with configurable item count and nesting depth. Perfect for populating test databases, mocking API responses, and prototyping data-driven UIs without manually writing sample data.

How to use

  1. Set the number of objects and nesting depth.
  2. Click Generate to create random JSON data.
  3. Click Copy All to copy the generated JSON to your clipboard.

More JSON Tools

JSON Formatter

Format and beautify your JSON data for better readability.

JSON Validator

Validate your JSON data and find syntax errors instantly.

JSON Minifier

Minify and compress your JSON by removing all whitespace and line breaks.

Frequently Asked Questions

FAQs about JSON Generator

What kind of data does this generate?

The generator creates JSON objects with random string, number, boolean, null, array, and nested object values. Key names are generated from Greek letter words.

Can I control the output structure?

Yes. Use the "Number of objects" option to set how many items to generate, and "Nesting depth" to control how deeply nested the objects can be (1-3 levels).

Is the output valid JSON?

Yes, the generated output is always valid JSON that can be parsed by any JSON parser.

Can I use this data in my tests?

Absolutely. The generated JSON is ideal for unit tests, integration tests, seeding databases, and mocking API responses during development.

Is this truly random?

Yes, values are generated using Math.random(). Each click produces different output. The data is not deterministic.