Free online random JSON generator. Generate random test JSON objects with nested structures, arrays and mixed types. Great for testing and mock data. Runs locally in browser.
100% Local
How to Use the Random JSON Generator
Click Generate Random JSON and a random JSON object is created with nested objects, arrays, strings, numbers and booleans. Each click produces a completely different structure. Use Clear to empty the output.
What the generator produces
Random object keys from a realistic set of names
Nested objects up to 3 levels deep
Arrays with 1 to 3 elements of mixed types
Values: random strings, integers, and booleans
Features
Completely different JSON on every click
Ideal for testing parsers, validators and UI components
No input required — one-click generation
All processing runs locally in your browser. Your data is not uploaded to any server.