Convert hpm to psd Online: hpm2psd

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

Go to Tom's Editor

HPM

Grass' Slideshow is an image format with extension HPM.

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.