Convert bmp to grf Online: bmp2grf
You can use Tom's Editor to easily convert images from
Microsoft Windows bitmap .BMP to GRF, MAX, P41, PIX .GRF.
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.
GRF, MAX, P41, PIX is an image format with extension GRF.