Convert fs to png Online: fs2png

You can use Tom's Editor to easily convert images from
Usenix FaceSaver file .FS to Portable Network Graphics .PNG.
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.

PNG

Portable Network Graphics is an image format with extension PNG.