UTL
UTL.toolsThe Digital Toolbox
Updated: August 2026 • Verified v1.2

Mock JSON Data & REST API Schema Generator

Developer ToolsHigh Usage

Local Browser Execution: Your input is processed locally in your browser and is not sent to UTL servers.
Deterministic Synthetic Schema Engine: Generate(Schema, Count, Seed)
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Understanding Your Results

Synthesizes structured JSON arrays containing realistic user, enterprise, or ecommerce records with toggleable property keys.

Practical Guidance & Next Steps

Use mock JSON datasets to populate tables, charts, and cards during frontend prototyping before backend endpoints are built.

What is this?

A developer testing tool that generates realistic synthetic JSON datasets for prototyping and testing.

How does it work?

1. Select desired record count (3 to 50 records). 2. Check or uncheck schema properties (ID, name, email, company, salary, country, status). 3. Copy the JSON string or download the `.json` file in 1 click.

Why use it?

Instantly generates dummy data without setting up backend test servers or external fake APIs.

Technical Scope & Calculation Limitations

Generates client-side synthetic datasets in standard JSON format.

Frequently Asked Questions

Yes. Click the 'Download .JSON' button to save the dataset directly to your computer.
Windows Desktop & Widget Options

Want this capability on your Windows desktop?

All Windows widgets
Desktop App
9.8/10

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By Etienne Baudoux (DevToys Team)View Widget
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