FAX File Type

- The quick facts

What are FAX files and how to open them

Are you having problems opening a FAX file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a FAX file?

FAX files have multiple uses, and FAX Document is one of them.

FAX Document

Files that contain the .fax file extension are most commonly associated with digital fax files. Users had to use actual fax machine devices to send and receive faxes in the past. With newer Internet technology, users can now send faxes using their computers and an Internet connection.

When a user receives digital fax, the fax file is saved to the user's hard drive with the .fax file extension. Some faxing applications will also keep copies of a user's sent faxes with the .fax file suffix.

The FAX file format conforms to the ITU-T recommendations T.30 and T.4. FAX files are usually saved in TIFF format. When the file is opened, the user can see the actual fax image sent to them via the digital FAX software.

How to open FAX files

We have identified one FAX opener that is compatible with this specific type of FAX file.

Programs that open FAX Document files

Last updated: June 29, 2022

More file formats using the FAX extension

Through our research of FAX files, we know that the following formats exist. However, we have not yet analyzed them in detail, and we would love to hear from you if you have information about either of them.

Amiga GPFax FAX

Amiga MultiFax FAX

Amiga TrapFAX FAX

Zyxel FAX Format

Various apps that use files with this extension

These apps are known to open certain types of FAX files. Remember, different programs may use FAX files for different purposes, so you may need to try out a few of them to be able to open your specific file.