How to use pngquant Compress and save it as a another file leaving the original image 1Ĭompress and overwrite the original image 1įor other detailed options refer to the official website : pngquant. Commandline toolsĬommandline tools are easy-to-use and speedy to compress or convert images, if you are familiar with the command line. This tool can compress all the images contained in the folder at once. ImageOptim is an easy-to-use GUI tool is a GUI tool for compressing image. GUI or commandline tools that converts image formats and compresses on Mac.