Convert hdiff to psd Online: hdiff2psd

You can use Tom's Editor to easily convert images from
Horizontal difference image .HDIFF to Adobe Photoshop .PSD.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

HDIFF

Horizontal difference image is an image format with extension HDIFF.

PSD

PSD is in internal image format of Adobe Photoshop. It can store all the features offered by Photoshop, like layers and paths. Images can be compressed or not.