Files that contain the .sfx file extension are most commonly associated with compressed archive files. When a user needs to transmit large files or large batches of files, they will often compress the files into a compressed archive in order to make transmission of the files easier. These files are commonly saved as an executable program so that the archive contained within the file can be self-extracted.
A variety of software applications assign the .sfx file extension when creating a file archive for this purpose. Some of the popular applications that use the .sfx file extension for compressed archive files include WinZip, WinAce, SFX-Factory and ALZip.
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If you have additional information about the SFX file format or software that uses files with the SFX suffix, please do get in touch - we would love hearing from you.