Convert hdiff to jpg Online: hdiff2jpg
You can use Tom's Editor to easily convert images from
Horizontal difference image .HDIFF to Joint Photographic Experts Group JFIF .JPG.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Horizontal difference image is an image format with extension HDIFF.
Joint Photographic Experts Group JFIF is an image format with extension JPG.