tldr/pages/common/optipng.md

optipng

PNG file optimization utility. More information: http://optipng.sourceforge.net.

• Compress a PNG with default settings:

optipng {{path/to/file.png}}

• Compress a PNG with the best compression:

optipng -o{{7}} {{path/to/file.png}}

• Compress a PNG with the fastest compression:

optipng -o{{0}} {{path/to/file.png}}

• Compress a PNG and add interlacing:

optipng -i {{1}} {{path/to/file.png}}

• Compress a PNG and preserve all metadata (including file timestamps):

optipng -preserve {{path/to/file.png}}

• Compress a PNG and remove all metadata:

optipng -strip all {{path/to/file.png}}