Doodle! is a raster image format associated with the Doodle! drawing program for Commodore 64 computers. It is not related to the Atari Doodle format.
There is an uncompressed and a compressed version of the format. On platforms that use filename extensions, uncompressed files use extension .dd, and compressed files use extension .jj.
Uncompressed files begin with
00 1C, or possibly
00 5C. Some sources say they are 9218 bytes in size, while others imply that sizes of 9026 and 9346 are also possible.
- Doodle, from the C64-Wiki