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Dummy Data Generator Pro

Generate realistic dummy data from Java & TypeScript — instantly, intelligently, and offline.

📥 Install Free Extension ✨ See Features
🧠 40+ Field Types 💻 Java & TypeScript ⚡ 1–100 Objects 🔒 Offline & Private

Stop Wasting Time Writing Dummy Data by Hand

Manually crafting test objects is slow, repetitive, and error-prone. Let the generator handle it — with context-aware, realistic values.

“I pasted a Java class and had 50 realistic objects in seconds. It recognized emails, UUIDs, salaries — everything.”

Paste your code. Choose a format. Generate. Done.

Why Developers Love It

Professional output. Zero configuration. Truly smart generation.

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Intelligent Recognition

Understands 40+ common fields with context-aware values.

  • Names, emails, phones, addresses
  • UUIDs, IPs, MAC addresses
  • Salaries, dates, booleans, more
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Multi-Language

Paste Java or TypeScript — it detects and formats automatically.

  • Java constructors & Lombok builders
  • TS classes, interfaces, literals
  • Proper type handling
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Modern UI

Clean gradient design with subtle motion and syntax highlighting.

  • Real-time field counting
  • Dark mode support
  • Compact, professional layout
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Power Options

Generate 1–100 objects with JSON or native object code.

  • Auto-fix common syntax issues
  • One-click copy
  • Lightweight (<500KB), offline

Key Features at a Glance

Focused on speed, accuracy, and developer experience.

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Auto Detection

Understands your fields, not just types.

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Multiple Formats

Native object code or JSON output.

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Lombok Support

Exclusive Java builder generation.

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Syntax Highlighting

Readable, production-quality output.

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Zero Dependencies

No APIs, no setup, works offline.

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Copy in One Click

Paste directly into your project.

How It Works

Five simple steps to realistic data.

1

Open

Click the extension icon.

2

Paste

Add your Java or TypeScript.

3

Choose

JSON or native object code.

4

Set Count

Generate 1–100 objects.

5

Copy

Use instantly in your app.

Supported Inputs

Works with Java and TypeScript out of the box.

☕

Java Class

public class User {
  private String name;
  private String email;
  private int age;
  private String city;
  private boolean isActive;
}
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TypeScript Interface

interface Employee {
  firstName: string;
  lastName: string;
  jobTitle: string;
  salary: number;
  startDate: string;
}
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TypeScript Class

class Product {
  productName: string;
  price: number;
  category: string;
  rating: number;
  isAvailable: boolean;
}

Output Formats

Choose the format that fits your workflow.

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Object Code

Ready-to-use initialization:

  • Java: constructors or Lombok builders
  • TypeScript: typed object literals
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JSON

Perfect for API mocking, frontend dev, fixtures, and seeding.

  • Clean, consistent keys
  • Realistic, validated values

Smart Field Detection

Understands people, business, and technical data — and generates realistic values accordingly.

…plus 30+ additional patterns with context-aware ranges and formats.

How It Stacks Up

Purpose-built for Java & TypeScript developers.

FeatureDummy Data Generator ProOther Tools
Java Support✅ Full (Constructors + Lombok)❌ None
TypeScript Support✅ Full (Classes + Interfaces)⚠️ Partial
Smart Field Detection✅ 40+ types❌ 5–10 types
Object Code Output✅ Yes❌ JSON only
Lombok Builders✅ Exclusive❌ None
Auto-Fix Syntax✅ Yes❌ No
Batch Generation✅ 1–100 objects⚠️ 1–10
Syntax Highlighting✅ Professional❌ Plain text
External Dependencies✅ None❌ Required
Size✅ <500KB❌ 2MB+

Technical Details

Modern stack. MV3 compliant. Built for speed.

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Built With

  • TypeScript
  • Webpack
  • CSS3 (variables & animations)
  • Chrome Extension API (Manifest V3)
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Browser Support

  • Chrome 88+ / Edge 88+
  • Brave & Chromium-based
  • MV3 compatible
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Permissions

  • clipboardWrite — one-click copy
  • No networking, no tracking
  • Offline-ready by design

What’s New

Latest improvements and fixes.

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Version 2.0.0 (Current)

  • Complete UI/UX redesign
  • 40+ smart field types
  • Auto-fix syntax issues
  • Smoother animations & dark mode
  • Real-time field counting
  • Syntax highlighting
  • Performance optimizations
  • Bug fixes (MAC/date generation)
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Version 1.0.0

  • Initial release
  • Java & TypeScript basics
  • Copy to clipboard

Use Cases

Built to help across the stack.

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Backend

Unit tests, prototyping, seeding.

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Frontend

API mocks, fixtures, component tests.

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QA

Edge cases, batch scenarios.

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Education

Teaching object patterns & data.

Install & Contribute

Chrome Web Store link coming soon — dev install below.

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Manual Install (Dev)

  1. Clone repo & open dummy directory
  2. npm install then npm run build
  3. Open chrome://extensions
  4. Enable Developer Mode → Load unpacked → select dummy
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Contributing

  • Report bugs & suggest features
  • Submit PRs (TypeScript/UX welcome)
  • Improve docs & examples
  • ⭐ Star the repo to support!
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License

MIT © 2025 — Open for personal & commercial use.

Support & feedback:

  • Issues / Discussions on GitHub
  • Email: support@dummydatagenerator.com

Ready to Generate Realistic Data?

Paste your class or interface, pick a format, and go.

📥 Install Free Extension

✓ Java & TypeScript • ✓ Lombok Builders • ✓ Offline • ✓ <500KB