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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
WEBARCHIVE - Extension Details
Date Added: January 01, 1970
File Extension:  .WEBARCHIVE
Description 1: .WEBARCHIVE is the extension for web archive files the Safari Apple Web browser uses. These files contain images and HTML, allowing pages to be completely loaded at later times even when a PC is not hooked up to the Net or offline. The Safari program is available for both Microsoft Windows and Macintosh OS X. A single file includes videos, images, sounds and HTML pages.
File Type:   Archive and Compressed file
Mode: Binary
Program(s) to Open:  Macintosh: Apple Safari
Common:
Extension: