Convert flif to rfg Online: flif2rfg

You can use Tom's Editor to easily convert images from
Free Lossless Image Format .FLIF to LEGO Mindstorms EV3 Robot Graphics File .RFG.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

FLIF

Free Lossless Image Format is an image format with extension FLIF.

RFG

LEGO Mindstorms EV3 Robot Graphics File is an image format with extension RFG.