Convert duo to png Online: duo2png

You can use Tom's Editor to easily convert images from
DU1, DUO .DUO to Portable Network Graphics .PNG.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

DUO

DU1, DUO is an image format with extension DUO.

PNG

Portable Network Graphics is an image format with extension PNG.