7 Zipx86 and x64bit
7-Zip is open source software. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license: GNU LGPL + unRAR restrictions.
7-Zip has been well reviewed, and has won awards.
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 using a stacked combination of filters. These can consist of pre-processors, compression algorithms, and encryption filters.
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