7-Zip
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| Developer(s) | Igor Pavlov | ||||
|---|---|---|---|---|---|
| Initial release | 1999 | ||||
| Development status | Active | ||||
| Operating system | Microsoft Windows, Linux, OSX | ||||
| License | GNU GPL/LGPL | ||||
| Website | [1] | ||||
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7-Zip is a free and open-source file archiver, a utility used to place groups of files within compressed containers known as "archives". It is developed by Igor Pavlov and was first released in 1999. 7-Zip has its own archive format called 7z introduced in 2001, but can read and write several others.
Installation
Download and run the installer for your operating system from the [2].
Archive formats
By default, 7-Zip creates 7z-format archives with a .7z file extension. Each archive can contain multiple directories and files. As a container format, security or size reduction are achieved by looking for similarities throughout the data using a stacked combination of filters. These can consist of pre-processors, compression algorithms, and encryption filters.