Image Diff Tool

A simple and elegant macOS application for visually comparing images with drag-and-drop functionality.

Features

• Smart Drag & Drop: Drop images into panels or drop 2 images simultaneously to auto-populate both sides
• Comparison Modes:
  • Side by Side: Manual comparison view
  • Overlay: Adjustable opacity blending with animated loop option
  • Difference: Visual highlighting of changed pixels
• Wide Format Support: PNG, JPG, GIF, TIFF, HEIC, WebP, BMP, ICO, AVIF
• Export: Save difference images as PNG files

Requirements

• macOS 13.0 or later
• Xcode 15.0 or later (for building)

Installation

Build from Source

1. Clone the repository
2. Open ImageDiffTool.xcodeproj in Xcode
3. Select your development team and press Cmd+R to build and run

Usage

1. Load Images: Drag image files into left/right panels
2. Select Mode: Choose Side by Side, Overlay, or Difference
3. Compare: Click "Compare" to process images
4. Export: Save difference images with "Export Difference"

Technical Stack

• SwiftUI for UI development
• Core Image for image processing
• NSView for drag-and-drop functionality

License

This project is provided as-is for educational and personal use.