Convert bmp to atk Online: bmp2atk
You can use Tom's Editor to easily convert images from
Microsoft Windows bitmap .BMP to Andrew Toolkit raster object .ATK.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Format created by Microsoft for their Windows and OS/2 operating systems. Images can be compressed or not.
Andrew Toolkit raster object is an image format with extension ATK.