brew tap chupchupchup/img2jpg

brew install --cask img2jpg-optimizer

IMG2JPG Optimizer is a macOS Apple Silicon app (M1, M2, M3, M4) that optimizes your JPEG, PNG, HEIC, GIF, and WebP images by converting them into optimized progressive JPEGs using MozJPEG v4.

• Huffman-optimized compression
• Progressive JPEGs (better rendering on the web)
• PNG/HEIC/GIF/WebP → JPEG conversion via built-in ImageMagick
• Standalone app
• Simple interface: drag-and-drop designed for macOS Apple Silicon

• Image size reduced by 20–70% with no visible quality loss
• Huge time saver when preparing images for the web, presentations, or quick sharing
• Compatible with all browsers and editors

👉 Latest release (DMG)

Installation:

1. Download the .dmg
2. Drag the app into Applications
3. First run: right‑click → Open → Allow

Drag and drop files into the app

Display of optimized files with MozJPEG

• macOS 12+ (Monterey and later)
• Mac Apple Silicon (M1/M2/M3/M4)
• No Rosetta needed, all binaries are native arm64
  In macOS 26 you can authorize the app under System Settings > Privacy & Security and click "Open Anyway".

• Mozilla for MozJPEG v4
• ImageMagick for multi‑format conversion
• The open‑source community ✨

Distributed as Freeware / Donationware.
Free to use — you can contribute or donate to support the project.