JSON Generator - Create Mock Data Instantly | Free Online Tool | JSON Generator

JSON Generator - Free Online Mock Data Tool

Quick Start Templates

Docs
New to template functions? Learn how to use {{name()}}, {{email()}}, {{int()}} and 50+ more functions

Template

JSON
Actions

Generated JSON

Output

Powerful API Integration

Use with your favorite API tools

Get API Token

Works seamlessly with popular API clients:

cURL
Postman
Hoppscotch
Bruno
Yaak
Restfox
RapidAPI
Insomnia
POST Generate JSON from Template
curl -X POST https://jsongenerator.app/api/template \
-H "Authorization: Bearer YOUR_TOKEN" \
-H "Content-Type: application/json" \
-d '{ "name": "{{name()}}" }'
GET Retrieve Saved Template
curl https://jsongenerator.app/api/template/UUID \
-H "Authorization: Bearer YOUR_TOKEN"
Automate mock data in CI/CD
Integrate with test suites
Build dynamic API mocks

Key Features of JSON Generator

Lightning Fast

WebAssembly-powered generation for instant results. Generate thousands of JSON records in milliseconds with client-side processing.

Privacy First

All processing happens in your browser. Your data never leaves your device, ensuring complete privacy and security.

Unlimited Use

Generate as much data as you need. No limits, no quotas, no restrictions. Perfect for large-scale testing and development.