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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
UTC - Extension Details
Date Added: January 01, 1970
File Extension:  .UTC
Description 1: Files with the .UTC extension are associated with the Bioware Creature File. A creature is created using the Aurora 3D rendering engine of Bioware that is capable of interacting with objects as well as other creatures. Artificial intelligence or human players can control it. Videogames like Star Wars: Knights of the Old Republic and Neverwinter Nights are just two examples of the many games that use creature files.
File Type:   Game file
Mode: Binary
Program(s) to Open:  Windows: Referenced by various videogames
Common:
Extension: