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. Check license information here: 7-Zip license.

You can use 7-Zip on any computer, including a computer in a

commercial organization. You don’t need to register or pay for 7-Zip.
The main features of 7-Zip

High compression ratio in 7z format with LZMA and LZMA2

compression
Supported formats:
Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
Unpacking only: ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT,

HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS,

UDF, VHD, WIM, XAR and Z.
For ZIP and GZIP formats, 7-Zip provides a compression ratio that is

2-10 % better than the ratio provided by PKZip and WinZip
Strong AES-256 encryption in 7z and ZIP formats
Self-extracting capability for 7z format
Integration with Windows Shell
Powerful File Manager
Powerful command line version
Plugin for FAR Manager
Localizations for 79 languages

7-Zip works in Windows 7 / Vista / XP / 2008 / 2003 / 2000 / NT / ME

/ 98. There is a port of the command line version to Linux/Unix. and Its

Free .

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