PCauthorities.com presents…
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
U3P - Extension Details
Date Added: January 01, 1970
File Extension:  .U3P
Description 1: File extension .U3P is associated with the U3 Smart Application. It is a portable application stored on a special kind of USB flash drive known as U3 Smart Drive. With this file format, programs can be launched or run from the flash drive on any Windows PC. Sometimes when called for, the .U3P file installs files on the local computer. SanDisk, Verbatim, Memorex, Kingston and Intuix manufacture U3 smart drives.
File Type:   Executable file
Mode: Binary
Program(s) to Open:  Windows: runs directly from the USB flash drive
Common:
Extension: