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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
XPT - Extension Details
Date Added: March 03, 2009
File Extension:  .XPT
Description 1: File extension .XPT is linked to the SAS Transport File. This file features a data format from the Statistical Analysis Software (SAS), which is designed to work and be compatible with different computer operating systems. Use the .XPT file format for exporting SAS data sets to other software programs or platforms. SAS XPORT file is another term for XPT files.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows: SAS Analytic software, SPSS software Macintosh: SPSS software
Common:
Extension: