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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
TGZ - Extension Details
Date Added: March 12, 2008
File Extension:  .TGZ
Description 1: .TGZ files are Unix .TAR file archives that are compressed using Gnu Zip or .GZIP compression. A TAR file is able to archive multiple files into a single file. The archive file size is reduced through Gzip compression. Here is how to decompress from a Unix command line: Type "gunzip filename.tar.gz and hit Enter to decompress the archive. Next, type "tar xf packed_files.tar" and hit Enter to decode the TAR archive and make the files readable.
File Type:   Compressed file
Mode: Binary
Program(s) to Open:  Windows: Smith Micro Stuffit Deluxe, WinRAR, WinZip 12 Pro, Zipeg Macintosh: Smith Micro Stuffit Expander, Zipeg Unix: gunzip, tar
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