Convert gr9 to dds Online: gr92dds

You can use Tom's Editor to easily convert images from
Atari GR9 .GR9 to Direct Show Surface .DDS.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

GR9

Atari GR9 is an image format with extension GR9.

DDS

DDS are files invented by Microsoft to be used in games, mostly as textures. Images can be compressed to save space but the compression methods defined by DDS are all very fast in terms of coding and decoding.