Convert hpm to bmp Online: hpm2bmp

You can use Tom's Editor to easily convert images from
Grass' Slideshow .HPM to Microsoft Windows bitmap .BMP.
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.

BMP

Format created by Microsoft for their Windows and OS/2 operating systems. Images can be compressed or not.