Convert to FAX Online Tool.
There are two different types of FAX files. The first is a fax template created by Now Contact, a program that organizes your contacts and calendar activities. The fax document is a template that has preloaded options such as fancy fax and simple cover and the less formal flowers and swoosh. These files contain a .NWP extension. You can create a new FAX file, then select that template within the program. Now Contact is available for both Mac and Windows. The second FAX file type is an image fax software creates. These types of FAX files have a .TIFF extension. This standard image extension is viewable with many programs, including Apple Preview or Microsoft Windows Photo Viewer.