Convert bmp to mrw Online: bmp2mrw
You can use Tom's Editor to easily convert images from
Microsoft Windows bitmap .BMP to Sony (Minolta) Raw Image File .MRW.
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.
Sony (Minolta) Raw Image File is an image format with extension MRW.