Convert cmuwm to png Online: cmuwm2png

You can use Tom's Editor to easily convert images from
CMU window manager bitmap .CMUWM to Portable Network Graphics .PNG.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

CMUWM

CMU window manager bitmap is an image format with extension CMUWM.

PNG

Portable Network Graphics is an image format with extension PNG.