Convert gfb to png Online: gfb2png

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

Go to Tom's Editor

GFB

Atari GFB is an image format with extension GFB.

PNG

Portable Network Graphics is an image format with extension PNG.