JSON Generator

Write a JSON template with {{placeholder}} values and generate realistic mock data. Supports name, email, uuid, date, integer, boolean, and more.

Example

Template

[
  {
    "$repeat": 5,
    "$template": {
      "id": "{{uuid}}",
      "name": "{{name}}",
      "email": "{{email}}",
      "age": "{{integer(18,65)}}",
      "active": "{{boolean}}",
      "joined": "{{date}}"
    }
  }
]

225 characters

Generated JSON

[
  {
    "id": "936071df-d7ad-4912-bee8-284fd2d7008d",
    "name": "Iris Müller",
    "email": "dave.garcia@mail.net",
    "age": 65,
    "active": false,
    "joined": "2024-08-23"
  },
  {
    "id": "4045ef3d-9552-4f1e-b6b4-18139b733bed",
    "name": "Grace Tanaka",
    "email": "eve.jones@example.com",
    "age": 65,
    "active": false,
    "joined": "2024-12-23"
  },
  {
    "id": "47de3584-60a5-4749-a893-66e3ef9e0488",
    "name": "Jack Dubois",
    "email": "hank.tanaka@test.dev",
    "age": 20,
    "active": true,
    "joined": "2023-04-19"
  },
  {
    "id": "4b80dbeb-8ff9-4c08-a3b0-f75990691214",
    "name": "Carol Garcia",
    "email": "eve.dubois@mail.net",
    "age": 51,
    "active": true,
    "joined": "2024-08-08"
  },
  {
    "id": "157cad4b-65b8-4ca4-bfce-298b060d36fa",
    "name": "Grace Jones",
    "email": "eve.garcia@acme.org",
    "age": 57,
    "active": false,
    "joined": "2025-11-25"
  }
]

Available Placeholders

{{name}}Full name (e.g. Alice Smith)

{{firstName}}First name only

{{lastName}}Last name only

{{email}}Email address

{{uuid}}UUID v4

{{date}}Date (YYYY-MM-DD)

{{datetime}}ISO 8601 datetime

{{boolean}}true or false

{{integer(min,max)}}Random integer in range

{{float(min,max)}}Random float in range

{{color}}A color name

{{status}}active / inactive / pending / archived

{{sentence}}Lorem ipsum sentence

{{loremWord}}Single lorem ipsum word

{{url}}A URL

Use [{"$repeat": N, "$template": {...}}] to repeat an object N times.

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