Convert duo to pdf Online: duo2pdf

You can use Tom's Editor to easily convert images from
DU1, DUO .DUO to Portable Document Format .PDF.
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.

PDF

Adobe PDF format is the most popular document format. Overcomplicated. Offers compression.