
ImageOptim
ImageOptim makes images load faster. Removes bloated metadata. Saves disk space & bandwidth by compressing images without losing quality.
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 commandline.
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 commandline.
its main purpose is to reduce the size of the png idat datastream by trying various compression levels and png filter methods. it also can be used to remove unwanted ancillary chunks, or to add certain chunks including gama, trns, iccp, and textual chunks.
those who are not familiar with running software like pngcrush via the commandline can use the third party sites http://pngcrush.com/ or https://richardassar.github.io/pngcrush.js/ .
File compression PNG Compression
Productivity Social Phots and Graphics File Management
file-archiving image-processing command-line-interface png compressor file-compression image-compression optimization optimizer image-optimizer optimize lossless png-optimization png-compression compress-png