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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. [2] 7-Zip has its own archive format called 7z introduced in 2001, [12] but can read and write several others.
File archivers ZIP TAR GZ BZ2 7z XZ RAR LHA/LZH ACE SIT SITX ARJ KGB DAR ARC CAB ALZ ISO/CD Image ZPAQ Special 7-Zip: Yes Yes Yes [b] Yes [b] Yes Yes [b] No No No No No No No No No No No No No ALZip [c] Yes Yes Yes Yes No Unknown No No No No No No No No No Yes Yes Unknown No Archive Manager: Yes Yes Yes Yes Yes Yes No [d] Yes Unknown Un ...
The 7z format initially appeared as implemented by the 7-Zip archiver. The 7-Zip program is publicly available under the terms of the GNU Lesser General Public License. The LZMA SDK 4.62 was placed in the public domain in December 2008. The latest stable version of 7-Zip and LZMA SDK is version 24.09. [2] The 7z file format specification is ...
Genozip, a compressor for genomic file formats such as FASTQ, BAM, VCF and others. [4].gz application/gzip [5] gzip: Unix-like GNU Zip, the primary compression format used by Unix-like systems. The compression algorithm is Deflate, which combines LZSS with Huffman coding. .lz application/x-lzip lzip: Unix-like
The 7-Zip implementation uses several variants of hash chains, binary trees and Patricia trees as the basis for its dictionary search algorithm. In addition to LZMA, the SDK and 7-Zip also implements multiple preprocessing filters intended to improve compression, ranging from simple delta encoding (for images) and BCJ for executable code.
Software distributors use executable compression for a variety of reasons, primarily to reduce the secondary storage requirements of their software; as executable compressors are specifically designed to compress executable code, they often achieve better compression ratio than standard data compression facilities such as gzip, zip or bzip2 [citation needed].
24.09 [1] (29 November 2024; 10 days ago ()) Back to article "7-Zip" References These references will appear in the article, but this list appears only on this page.
The self-extracting executable may need to be renamed to contain a file extension associated with the corresponding packer; archive file formats known to support this include ARJ [1] and ZIP. [ 2 ] [ 3 ] Typically, self-extracting files for Microsoft operating systems such as DOS and Windows have a .exe extension, just like any other executable ...