ImageOptim is a GUI for lossless image optimization tools: PNGOUT, AdvPNG, Pngcrush, OptiPNG, JpegOptim, MozJPEG, Gifsicle, SVGO, and svgcleaner.
Requires:
git clone --recursive https://imageoptim.com ImageOptim
cd ImageOptim
To get started, open imageoptim/ImageOptim.xcodeproj
. It will automatically download and build all subprojects when run in Xcode.
In case of build errors, these sometimes help:
git submodule update
cd optipng # or gifsicle, or pngquant
make clean
make