Mock JSON Generator

Instead of writing test data by hand, this tool generates realistic fake JSON from a template with placeholders like {{name}}, {{email}}, or {{uuid}}. An array with a given number of items is built with the "key|N" syntax.

How to use it

• Describe the shape you want, dropping placeholders in where real values would go.
• For an array of several identically-shaped items, use "key|N", where N is how many you need.
• Each generation produces fresh random values — run it again to get a different data set from the same template.

Common uses

• Filling a local database or UI mockup with realistic test data without hand-writing fixtures.
• Creating a sample API response for documentation or frontend work before the backend is ready.
• Quickly checking how a component or table looks with a large number of data rows.

Things to keep in mind

Each generation is random by design — save the generated JSON separately if you need to see the exact same result again, rather than relying on regenerating it.

The generated data is realistic in form (an email looks like an email) but has no connection whatsoever to real people or records.