The WBMP file format stands for ‘Wireless Bitmap File Format’. It is a WAP graphic format optimized for mobile devices. Each pixel is saved as 1bit which means that a 8 x 8 pixel image will only require 64 bits ( 8 bytes). There is no support for colours or greyscale it only allows black and white as colours.
Mime type: image/vnd.wap.wbmp