Convert rfg to bmp Online: rfg2bmp
You can use Tom's Editor to easily convert images from
LEGO Mindstorms EV3 Robot Graphics File .RFG to Microsoft Windows bitmap .BMP.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
LEGO Mindstorms EV3 Robot Graphics File is an image format with extension RFG.
Format created by Microsoft for their Windows and OS/2 operating systems. Images can be compressed or not.