Convert sfw to flif Online: sfw2flif

You can use Tom's Editor to easily convert images from
Seattle File Works image .SFW to Free Lossless Image Format .FLIF.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

SFW

Seattle File Works image is an image format with extension SFW.

FLIF

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