Convert spu to flif Online: spu2flif
You can use Tom's Editor to easily convert images from
Spectrum 512 .SPU to Free Lossless Image Format .FLIF.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Spectrum 512 is an image format with extension SPU.
Free Lossless Image Format is an image format with extension FLIF.