XnView MP
Free Personal
XnView MP is the enhanced version of XnView Classic. It is a powerful cross-platform media browser, viewer and converter.
ImageMagick
Open Source
ImageMagick is a free and open-source software suite for displaying, converting, and editing raster image and vector image files.
ImageOptim
Open Source
ImageOptim makes images load faster. Removes bloated metadata. Saves disk space & bandwidth by compressing images without losing quality.
GraphicsMagick
Open Source
GraphicsMagick is a utility of image processing.
PhotoBulk
Commercial
PhotoBulk is an easy-to-use batch photo editor. Watermark photos, Optimize and Rename photos at once.
Preview
Free
Preview is the image viewer and PDF viewer of the macOS operating system.
XnConvert
Free
XnConvert is a powerful and free cross-platform batch image processor, allowing you to combine over 80 actions.
Compare Phatch with alternatives
Compare GraphicsMagick and Phatch and decide which is most suitable for you.