The XTM file extension is generated for intermediate files by using the file splitter application software xStremSplit. The xStremSplit file splitter application is available for free download. It can split large files into smaller files and join the smaller files to rebuild the original large file. The file splitter software is easy to use and can split all kinds of files. In order to split a large file, just choose the file to be split and specify the folder in which the smaller files should be saved. Once the file has been split, the specified folder will contain smaller files with the XTM file extension.