Dummy JSON Generator
Generate dummy JSON for testing or mock APIs using our free JSON Generator. Fast, customizable, and browser-based. No signup required, just copy and use.
About Dummy JSON Generator
Generate Dummy JSON Instantly with Our Free JSON Generator Tool
The JSON Generator is a powerful and free online tool to create structured dummy JSON data for testing, prototyping, or teaching purposes. Whether you're building a REST API, mocking frontend components, or learning JSON structure, this tool saves time by generating customizable and clean JSON with one click.
Why Use a JSON Generator?
Developers often need realistic-looking JSON data to simulate API responses or build UIs before real backend integration. This tool eliminates the need to manually type out fake data or search for example JSON files online.
Top Features
- Field Customization: Choose number of records, field names, and field types.
- Preset Templates: Quickly generate user, product, or order data using built-in templates.
- Instant Copy & Download: Export or share JSON in one click.
- 100% Secure & Local: No server calls – generation happens right in your browser.
- Developer Friendly: Ideal for React, Vue, Angular, Postman, or API mocking tools.
How It Works
Step 1: Choose a Template or Define Fields
Select one of our built-in templates (Users, Products, etc.) or customize your own fields with name, type, and values.
Step 2: Click “Generate JSON”
The tool creates a valid JSON array with sample records.
Step 3: Copy or Download
Use the output in your local dev environment, Postman, or app prototype.
Use Cases
- Mocking REST API endpoints for frontend development
- Unit and integration testing with dummy payloads
- Teaching JSON structure to students or new developers
- Generating test data for database seeding
Frequently Asked Questions
1. What does this tool do?
It generates dummy JSON data based on user-selected templates or fields.
2. Can I customize the fields?
Yes, you can define custom field names and value types like string, number, date, boolean.
3. Is this JSON valid?
Yes. All generated output follows valid JSON syntax and can be parsed by any JSON library.
4. Can I download or copy the output?
Yes, one-click options are available for both copying and downloading the result.
5. Is it secure?
Absolutely. Everything happens in your browser. No data is sent to any server.
6. Can I use this JSON in Postman or my API app?
Yes, the output is ideal for testing in Postman, API tools, frontend frameworks, and more.
7. Will this work on mobile?
Yes, it’s fully responsive and works smoothly on mobile, tablet, and desktop devices.
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