npm

optipng

PNG optimizer that reduces file size while preserving image quality

brewmacoslinux
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Source

About

PNG file optimizer

Commands

optipng

Examples

Optimize a single PNG file with default settings$ optipng image.png
Optimize PNG with maximum compression (-o4 is highest)$ optipng -o4 image.png
Optimize all PNG files in current directory recursively$ optipng -r .