Creature's Sprite Util
Creature's Sprite Util or sprite-util.exe is a command line program by bedalton for Windows which is used for parsing, compiling or converting Creatures sprite files, including SPR, S16, C16 and BLK. (BLK is not supported for conversions). It can also convert a breed's images (and optionally its ATTs) from one game to another. Supported file types for images to be converted into creatures sprites are BMP and PNG.
It must be run from CMD.