imagealpha ☆

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Description:
Utility to reduce the size of 24-bit PNG files

Type: Cask | Latest Version: 1.5.1@0 | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Productivity

Tags: png optimization compression images web

Install: brew install --cask imagealpha

About:
ImageAlpha is a GUI utility for Mac that losslessly optimizes 24-bit PNG images by converting them to 8-bit PNG with transparency. It leverages advanced compression tools like pngquant, pngnq, and AdvPNG to significantly reduce file sizes without visual degradation. This results in faster website load times and more efficient storage for web graphics.

Key Features:

Batch processing for multiple files
Lossy compression with adjustable quality settings
Supports PNG, GIF, and JPEG input formats
Preview before and after optimization
Integration with Finder and Quick Look

Use Cases:

Optimizing website images for faster page loads
Reducing storage space for large image libraries
Preparing assets for mobile applications

Alternatives:

ImageOptim – More comprehensive tool that includes PNG, JPEG, and GIF optimization with additional features like metadata stripping
TinyPNG – Web-based service with API, offers similar compression but requires uploading to external servers

Version History

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