Opening an HFX File

The HFX file type is primarily associated with WinFax Pro.

HFX	File extension: HFX
	File type:	fax document

What is an HFX file?

HFX files mostly belong to WinFax Pro. Fax Documents via TIFF: HFX files are often used to store fax documents. They usually carry a TIFF structure that many fax systems use. For example, HFMC uses these files with applications like WinFax Pro to send and receive fax images.
ProShow Slideshow Files: At times, the same HFX extension marks files that hold data for photo slideshows. These files work with software such as ProShow Gold and are used to produce photo slideshow effects.
Multimedia and Graphics Data: In other cases, HFX files use the RIFF format to store graphics or even proprietary multimedia information, sometimes shown as a Halifax NSA321/322 Disk Image. This usage shows a different internal data structure within the same file extension.
Key Detail: The reuse of the HFX extension for distinct internal formats makes it important to check the file’s properties to decide the correct application for opening and viewing it.

• Use fax software for TIFF-based fax documents.
• Open slideshow files with ProShow Gold if they contain photo effects.
• If the file uses RIFF, inspect it with a hex editor or check for multimedia support.

How to open HFX files

You need a suitable software like WinFax Pro to open an HFX file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your HFX file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a HFX file directly in the browser:. Just drag the file onto this browser window and drop it.

Online HFX Text Viewer

Choose your .hfx file to analyze

or drag and drop it here

Online File Viewer

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HFX file extension format:

To view or edit HFX files you need to know the file format, because it determines how the data in this file is stored. The file format can be determined based on the file extension and the signature (the first few characters of a file). However, different programs can use the same file extension. Furthermore, a file extension can be renamed incorrectly and double-clicking on it will then display an error when it is opened. So a detailed analysis of a file is vital in order to determine the format and the associated program. Below is our analysis of the HFX files:

HFX is rarely used as a file extension and is used by different programs with different formats. The two most common formats are as follows:

• 35% of all HFX files internally utilize the TIFF file format. TIFF is short for Tagged Image File Format. It stores raster graphics images that support color depths from 1 to 24-bit, lossy and lossless compression and multiple layers and pages. The content consists of illegible binary data, which can only be read and interpreted by the associated programs. HFX files can be up to 1 MB in size, but are often around 28 KB - 340 KB. The file type was used 20 years ago. The following keywords are characteristic: HFMC. Files like these are sometimes connected to person-related data.
• 25% of all HFX files are Harvard F/X additional graphics/effects files, which are based on the RIFF file format. RIFF files store data in tagged chunks. There are primarily used to store multimedia such as sound and video. These files contain neither text nor words, but only data. A typical file size is 85 KB. Several words can almost always be found in the files, e.g. HDRWDRHD and RIFF.

The remaining 40% of all HFX files are files with no common format, such as HFXEHED. Sometimes used for anniversary, manifold, project or airplane. If you want to find out what your HFX file contains, drag and drop it onto this page.