Convert ist to flif Online: ist2flif

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

Go to Tom's Editor

IST

Interlace Studio is an image format with extension IST.

FLIF

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