Random JSON Generator

Generate random JSON data or randomize existing JSON values instantly.

Drag & Drop Supported

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About Random JSON Generator

Need mock data for your application? Our Random JSON Generator helps developers create realistic JSON data structures for testing APIs, populating databases, or prototyping user interfaces.

Instant Generation

Generate complex JSON structures instantly. Changes to your template are reflected in real-time.

Structure Preservation

Keeps your data types intact. Strings remain strings, numbers remain numbers, but the values become randomized.

Easy Export

Copy to clipboard or download as a .json file with a single click.

How it works

This tool takes a JSON object as a 'template'. It traverses the object and replaces values with random data of the same type:

  • Strings: Replaced with random alphanumeric strings.
  • Numbers: Replaced with random integers or floats.
  • Booleans: Randomly flipped between true and false.
  • Arrays: The structure is preserved, but elements are randomized.