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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
C2D - Extension Details
Date Added: January 01, 1970
File Extension:  .C2D
Description 1: .C2D file extension is linked with WinOnCD Image File. .C2D file is a duplicate copy of a CD created by using WinOnCD a disc imaging application developed by Sonic Solutions that is now owned by Roxio. .C2D files store the exact duplicate of CD data that can be used for making backup discs or duplicates. .C2D files can be opened directly. .C2D file extension and WinOnCD are owned and developed by Roxio.
File Type:   Disk Image [ISO] Binary File
Mode: Binary
Program(s) to Open:  Windows: EZB Systems UltraISO, ISOBuster, Roxio Easy Media Creator; Mac: Roxio Toast
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