It is used with a Handmade Software. This company has several digital image editing products that create and use files with the file extension HSI. The .hsi file extension is used for objects that contain data from within the Image Alchemy program. This file format was developed so that the software is able to share others' project files.
Trouble opening HSI files on Microsoft Windows?
Advanced File Optimizer
Need help opening a HSI file? Advanced File Optimizer will do this for you. Opening a HSI file only takes a few clicks and is very easy, even for novice users.
Compatible with Window XP, Vista, 7, 8, 8.1 and 10