Crunch : Crunch is a tool for lossy PNG image file optimization. It combines selective bit depth, color type, and color palette reduction with zopfli DEFLATE c...
Trimage (lossless) image compressor : Trimage is a cross-platform GUI and command-line interface to optimize image files via optipng, pngcrush, advpng and jpegoptim
Squoosh : Squoosh is an image compression web app that allows you to dive into the advanced options provided by various image compressors.
Pngcrush : Pngcrush is an optimizer for PNG (Portable Network Graphics) files. It can be run from a commandline in an MSDOS window, or from a UNIX or LINUX comma...
SVGOMG : SVGOMG is SVGO's Missing GUI, aiming to expose the majority, if not all the configuration options of SVGO (Nodejs-based tool for optimizing SVG vector...
PunyPNG is a free website optimization tool that dramatically reduces the file size of your images without any loss of quality.