A GUI frontend for p7zip on the Mac OS X operating system named keka is also available. An alternate GUI for 7-Zip on Windows, #7Z, has been released by the same developers. There are several GUI frontends for p7zip such as Q7Z. In the form of p7zip, the command line version has been ported for use on Unix-like systems including Linux, FreeBSD, Mac OS X and AmigaOS 4. The 7-Zip deflate encoder implementation is available separately as part of the AdvanceCOMP suite of tools. When compressing ZIP or gzip files, 7-Zip uses a home-brewed DEFLATE encoder which is often able to achieve higher compression levels than the more common DEFLATE implementation of zlib, at the expense of compression speed. Similarly, some executable programs (.EXEs) may be opened as archives and have their contents extracted by 7-Zip. Some Microsoft CAB (LZX compression) and NSIS (LZMA) installer formats can be opened, meaning that 7-Zip can be used to check if a binary file is an archive.
Unpacking only: Microsoft cabinet (CAB) files, RAR, MSLZ, SWF, FLV, ARJ, Z, LHA, cpio, smzip, JAR, ISO CD/DVD images (7Zip version 4.42 and up), DMG, HFS, rpm and Debian deb archives.Īccording to the 7-Zip website, since version 4.65 (from ), 7-Zip can unpack the following formats in addition to the formats it fully supports: ARJ, CAB, CHM, cpio, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z.ħ-Zip is able to open some MSI files, allowing access to the meta-files within along with the main contents. Packing/unpacking of ZIP, gzip, bzip2, tar and, in betas for version 9, xz.
Other supported formatsħ-Zip supports a number of other compression and non-compression archive formats including:
The specification can be found in plain text format in the doc\ subdirectory of the source code distribution. The official 7z file format specification is distributed with the program's source code. The native 7z file format is open and modular. LZMA consists of a large LZ-based sliding dictionary up to 4 GB in size, backed by a range coder. Developed by Igor Pavlov, LZMA is a relatively new system, making its debut as part of the 7z format. 7z compression uses a variety of algorithms, the most common of which are bzip2, LZMA2, and LZMA. These can consist of pre-processors, compression algorithms, and encryption filters. As a container format, security or size reduction are achieved using a stacked combination of filters. Each archive can contain multiple directories and files. Formats The 7z archive formatīy default, 7-Zip creates 7z format archives with a. It was the winner of the 2007 community choice awards for "Technical Design" and for "Best Project". Other popular applications that can open this fileħ-Zip From Wikipedia, the free encyclopediaħ-Zip is distributed under the GNU Lesser General Public License. 7-Zip can create self-extracting archives although cannot do so for multi-volume archives.7-Zip can unpack archives with corrupted filenames, renaming the files as required.Ability to attempt to open EXE files as archives, allowing the decompression of data from inside many "SetUp" or "Installer" or "Extract" type programs without having to launch them.Multiple CPU / core / threading settings can be configured.When in 2-panel mode, 7-Zip can be used as a basic orthodox file manager.7-Zip supports volumes of dynamically variable sizes, allowing use for backups on removable media such as writable CDs and DVDs.WinZip-developed AES encryption standard is also available in 7-Zip to encrypt ZIP archives with AES 256-bit, but it doesn't offer filename encryption as in 7z archives.
When the directory structure is encrypted, users are required to supply a password to see the filenames contained within the archive, unless only the data was encrypted but not the filenames. Encryption can be enabled for both files and the 7z directory structure.
For encryption, 7z archives support the 256-bit AES cipher.It is related to a cross-platform port, p7zip. 7-Zip began in 1999 and is actively developed by Igor Pavlov. The program can be used from a command line interface, graphical user interface, or Windows shell integration. 7-Zip operates with the 7z archive format, and can read and write to several other archive formats. Operating system: Win 7, Vista, XP, 2008, 2003, 2000, NT, ME, 98ħ-Zip is an open source file archiver designed originally for Microsoft Windows.