About the Random JSON Generator
The Random JSON Generator produces a JSON array of objects filled with randomly generated values — particularly helpful for testing APIs, mocking data for development environments, or creating sample datasets for analysis.
Choose how many objects (rows) and fields per object (columns) you need, and the tool instantly builds a flat JSON array with a random alphanumeric string in each field — ready to paste into a test request, a mock server, or a prototype.
How to Use This Tool
Set rows and columns
Choose how many objects and fields per object you want.
Click "Generate Random JSON"
A JSON array of objects filled with random alphanumeric values is instantly created.
Copy the result
Use the "Copy" button to save the generated JSON.
Common Use Cases
Testing API Endpoints: Generate a quick array of sample objects to POST to an API you're testing.
Mocking Data for a Frontend Prototype: Populate a UI mockup with placeholder JSON before real backend data is available.
Seeding a Development Database: Create sample records to insert into a dev or staging database for testing.
Practicing JSON Parsing: Generate sample JSON to practice writing a parser or a JSON-processing script.
Why Use This Tool
Fast & Instant
Generates a JSON array of objects in a single click.
Customizable Size
Choose exactly how many objects and fields per object you need.
One-Click Copy
Copy the generated JSON instantly for use elsewhere.