Convert hpm to flif Online: hpm2flif

You can use Tom's Editor to easily convert images from
Grass' Slideshow .HPM to Free Lossless Image Format .FLIF.
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.

FLIF

Free Lossless Image Format is an image format with extension FLIF.