Convert fs to flif Online: fs2flif

You can use Tom's Editor to easily convert images from
Usenix FaceSaver file .FS to Free Lossless Image Format .FLIF.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

FS

Usenix FaceSaver file is an image format with extension FS.

FLIF

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