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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
QPM - Extension Details
Date Added: January 01, 1970
File Extension:  .QPM
Description 1: File extension .QPM is associated with Quick Pallet Maker Input Data. QPM files contain primary package info and box along with the pallet settings. The .QPM file format is a handy tool for use in the calculation of the shipping pallet arrangements that are taken from or based on the primary package dimensions.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Mac and Windows: Koona Software Quick Pallet Maker
Common:
Extension: