7-Zip 9.31 Alpha

7-Zip is a open source file archiver with a high compression ratio. The program supports 7z, XZ, BZIP2, GZIP, TAR, ZIP, WIM, ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR, Z. 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 are:

High compression ratio in new 7z format with LZMA compression
Compression ratio for ZIP and GZIP formats: 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 74 languages

What's new after 7-Zip 9.30 Alpha:

7-Zip now can create multivolume SFX archives in 7z format.
ZIP, NSIS, HFS, AR support was improved.
7-Zip now supports files larger than 4 GiB in ISO archives
Improved compression ratio in 7z format with maximum or ultra level for
executable files (EXE and DLL) that are larger than 16 MB (improved BCJ2 filter).
Improved support for file pathnames longer than 260 characters.
CRC and SHA checksum calculation for files can be called via Explorer's context menu.
7-Zip File Manager now also takes into account the numbers in filenames for sorting order.
7-Zip File Manager can open files in "Parser" mode via "Open Archive > #" context
menu command. It shows the list of archives inside file.
Command line version:
new -t# switch to open file in "Parser" mode and show the list of archives inside file.
new -stx{Type} switch to exclude archive type from using.
-scs switch now supports UTF-16 encoding.