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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
BDF - Extension Details
Date Added: January 01, 1970
File Extension:  .BDF
Description 1: .BDF file extension is linked with Adobe Glyph Bitmap Distribution Format. This is the file that stores the Adobe screen fonts in ASCII format which is readable by the user. Adobe Glyph Bitmap is used to be referred to as Character Bitmap Distribution Format, but it was changed to complement the current industry terminology.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  Windows: Adobe Creative Suite
Common:
Extension: