Convert jpt to flif Online: jpt2flif
You can use Tom's Editor to easily convert images from
JPEG-2000 Code Stream Syntax .JPT to Free Lossless Image Format .FLIF.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
JPEG-2000 Code Stream Syntax is an image format with extension JPT.
Free Lossless Image Format is an image format with extension FLIF.