Files that contain the .xtm file extension are data files that have been created by the Xtremsplit file splitting utility.
The Xtremsplit software application takes large files or file archives and splits the larger files into several smaller files. This makes it easier to transmit the files over the Web and via email. The receiver of the file does not need the Xtremsplit software in order to reconstruct the XTM files once they are received.
The .xtm file extension is also used for the CmapTools software. These XTM files contain exported topic map files that are used by the application.
Try a universal file viewer
File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.
If you have additional information about the XTM file format or software that uses files with the XTM suffix, please do get in touch - we would love hearing from you.