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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
LIB - Extension Details
Date Added: March 11, 2008
File Extension:  .LIB
Description 1: .LIB file extension is linked with Generic Data Library. This is the library of information utilized by a particular program. .LIB file often contains constants and functions that are referenced by a program. It may also carry actual objects such as images, text clippings or other media. The standard .LIB file is supported by various programs and it should not be manually opened.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  Windows & Mac: utilized by various programs that require file libraries
Common:
Extension: