Convert bmp to arw Online: bmp2arw
You can use Tom's Editor to easily convert images from
Microsoft Windows bitmap .BMP to Sony Digital Camera Alpha Raw Image .ARW.
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 Digital Camera Alpha Raw Image is an image format with extension ARW.