Convert gif to acs Online: gif2acs
You can use Tom's Editor to easily convert images from
CompuServe Graphics Interchange Format .GIF to AtariTools-800 font .ACS.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
GIF images were created by Compuserve. They can used no more than 256 colors and a single color transparenty (no Alpha channel). Today are rare since they offer low quality and huge filesizes. GIF animations are still in use.
AtariTools-800 font is an image format with extension ACS.