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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
CPF - Extension Details
Date Added: January 01, 1970
File Extension:  .CPF
Description 1: .CFP file extension is linked with Bitmap Native Format for CoverFactory. .CFP file carried the editable eBook Cover and it is an unusual file format in such a way that it includes bitmaps for the sides of object, a vector drawn on top of various sides and a 3D model. The bitmap data for this file is compressed via runlength and proprietary compression methods. .CFP file extension and CoverFactory are owned and developed by Answers 2000 Limited.
File Type:   Bitmap Image File
Mode: Binary
Program(s) to Open:  Windows & Mac: CoverFactory
Common:
Extension: