PNGShrink

PNGShrink uses the popular pngquant algorithm to quantize PNG images, which results in much smaller files, with up to 70% decrease in file size. Used by Web- and app developers, animators and graphic designers to increase the speed and save bandwidth usage of apps and websites, especially on mobile devices.

Features

• easy-to-use interface for pngquant
• simply drag-and-drop files or folders into the application (or dock icon)
• automatically includes subfolders
• converts all '.png' files and leaves other files alone
• auto-rename or keep your original filenames