.ADD File

The add file extension is associated with the Alphacam, a CAD and CAM software solution for the Woodworking industry available for Microsoft Windows operating system.

This type of .add file contains die-cut drawing created in the Alphacam.

How to open:

You can definitely Use Alphacam to open and work with *.add files. As for other programs, perhaps some 3rd party software supports Alphacam formats.

How to convert:

Some sort of exchange or reporting export is likely, most likely to some other graphics formats.