The HFX file extension is related to the HotFax and used for its data files. The HotFax is obsolete product.
There are 3 other file types using
the HFX file extension!
.hfx - Harvard Graphics F/X file
.hfx - Pinnacle Hollywood FX special effects file
.hfx - US Robotics Rapid Comm voice data file
HFX file extension - HotFax data file
What is hfx file? How to open hfx files?
File type specification:
The HFX file extension is associated with the HotFax an application developed by Smith Micro. The .hfx file stores various data used for internal purposes of the HotFax application.
HotFax is obsolete product.