What is Dummy Image Generator?

Generate placeholder images with custom dimensions, colors, and formats directly in your browser. Useful for web development and design when you need to verify layouts before final assets are ready.

Supports PNG, JPEG, and WebP formats with flexible sizing from 300×300px to 3840×2160px (4K). Width ranges from 1-4000px and height from 1-3000px. Download generated images and place them directly in your mockups or prototypes.

Key Features

📐 Size Presets

Set width and height in 1px increments, or choose from 10 preset sizes.

• Square: 300×300px
• Social media: 1200×630px (OGP image)
• HD: 1280×720px, 1920×1080px
• 2K: 2560×1440px
• 4K: 3840×2160px

🎨 Color and Format

Choose background and text colors using the color picker. Images display "width × height" in the center for easy identification.

Select output format based on your needs.

• PNG: Lossless compression, high quality (default)
• JPEG: Lossy compression, smaller file size
• WebP: High compression ratio, modern browsers

📊 Increase File Size with Noise

Adjust noise level (0-100%) in advanced settings to increase file size with minimal visual change. Useful for testing upload features requiring "images larger than XX MB" or validating large file handling.

⚡ Real-time Preview

Preview updates instantly as you change settings, with actual file size displayed.

How to Use

1. Select a preset or enter custom width and height
2. Set background and text colors
3. Change output format if needed (PNG/JPEG/WebP)
4. Review preview and click download

To increase file size, open "Advanced Settings" and adjust noise level.

Use Cases

Website Development
Use as placeholder images in wireframes and prototypes. Verify layouts and responsive behavior before final images arrive.

Design Mockups
Quickly generate appropriately sized placeholders for client presentations and design proposals.

Upload Feature Testing
Create test images with specific sizes and file capacities to test file size limits and image processing functions.

UI Component Validation
Test image display areas and thumbnail rendering with various aspect ratios.

FAQ

Q. Are generated images copyrighted?
A. No copyright restrictions—these are simple solid-color images with size text, free to use.

Q. Can I create images larger than 4K (3840×2160px)?
A. Currently limited to 4000px width and 3000px height. Please send us feedback if you need larger sizes.

Q. Does adding noise degrade image quality?
A. Noise is barely visible to the human eye and has minimal impact on quality. Only file size increases.

Q. When should I use PNG, JPEG, or WebP?
A. PNG (lossless, high quality), JPEG (smaller file size), or WebP (high compression, modern browsers). PNG is a safe default choice.