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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
ZIX - Extension Details
Date Added: January 01, 1970
File Extension:  .ZIX
Description 1: ZIX is the extension linked to the file archive that is compressed via WinZix compression. This format claims to employ a compression ratio that is much higher than what other file archiving utilities offer. It is also said to perform compression activities at a faster rate. Be warned though, WinZix has been observed to install spy programs on computers and might not compress files. The use of WinZix is therefore not encouraged.
File Type:   Compressed file
Mode: Binary
Program(s) to Open:  Windows: UnZix, UnZix Win, WinZix Unix: WinZix Console version
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