Files that contain the .xpt file extension are commonly associated with the Mozilla Firefox Internet browser. The XPT files that are used by this Web browser contain components or plug-ins for Firefox. For example, the Flash player plug-in would be saved as flashplayer.xpt.
The XPT files that are created for Firefox provide users with more features and functionality when using the Firefox browsing program.
Files that contain the .xpt file extension may also contain export SAS (Statistical Analysis Software) data files. These SAS data files are saved into the XPT file format so that the files can be read on another platform or with another software application.
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If you have additional information about the XPT file format or software that uses files with the XPT suffix, please do get in touch - we would love hearing from you.