A 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  The HotFax is obsolete product.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!

empty icon.hfx - Harvard Graphics F/X data

empty icon.hfx - Pinnacle Hollywood FX special effects

empty icon.hfx - US Robotics Rapid Comm voice data file

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HFX file extension - HotFax data

What is hfx file? How to open hfx files?

File type specification:

Various data file type icon Various data file type

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HotFax is obsolete product.

This hfx file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

Help how to open:

Probably cannot be converted to anything else.

How to convert:

Probably cannot be converted to anything else.

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