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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
PAQ - Extension Details
Date Added: January 01, 1970
File Extension:  .PAQ
Description 1: .PAQ files contain data that are used to restore system files or other related data that are preinstalled on HewlettPackard (HP) computer systems. Generally included on the HP system program software installer or recovery disks, a .PAQ file is saved in encrypted and compressed archive format. Open PAQ files with decompression programs like WinZip. If asked for a password, unlock the file by entering "Pandora.
File Type:   Backup file
Mode: Binary
Program(s) to Open:  Windows: Corel WinZip, PKWARE PKUNZIP
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