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what is a 7z file

PeaZip is a free cross-platform file archiver utility that provides an unified portable GUI for many Open Source technologies like 7-Zip, FreeArc, PAQ, UPX... free alternative to WinRar, WinZip and similar proprietary software.
- Create 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP files
- Open and extract ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF, ZIPX files and more,
over 180 archive types supported
Features of PeaZip includes:
archives opener and extractor, batch creation and extraction of multiple archives at once, convert files, create self-extracting archives, split and join files, strong encryption with two factor authentication, encrypted password manager, secure deletion, find duplicate files, calculate hash and checksum, export job definition as script.

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What is 7Z file format, 7-Zip archives



7z extension



7Z extension designates a popular archiving format, created for 7-Zip, a modern file archiver application written by Igor Pavlov and released as freeware and Open Source software. 7-Zip (often incorrectly shortened in 7zip) was originally developed for Microsoft Windows platforms, and ported by p7zip (POSIX-7Zip) project team on Unix platforms.
Spanned multi-volume 7z archives are designated by .001 extension, incrementing file extension numerator for each successive volume of the set - spanned 7z files are split byte-wise, this raw splitting mechanism being compatible with Unix / Linux "split" command and Windows utilities like HJSplit.

7Z features very high compression ratio through powerful compression algorithms (LZMA, LZMA2, PPMd, BZip2, optionally optimized Deflate), at cost of more memory and CPU intensive compression process - that however can take benefit of parallel computing on modern multicore CPUs.
On average test cases 7Z format improves compression ratio 30-70% better over classic ZIP format, and 6-7% better than RAR file format (WinRar's native format, proprietary). 7Z compression compares favourably also with new WinZip's ZIPX format in most cases.
7Z format also features native UTF-8 support for filenames, Rijndael / AES encryption, and volume spanning.

7z format features

When is 7Z format recommended

.7z is a good choice anytime it is important to attain a superior compression ratio, and it is welcome the support for strong encyption to keep archived data private. PeaZip also supports creation of 7z-format self extracting archives (SFX), so recipient will not need a 7-Zip compatible extractor when receiving one of those self-extracting files.

7z format specifications

Read more about .7z extension: 7-Zip official domain7zip software domain, p7zip projectp7zip POSIX port of 7-Zip for Unix and Unix-like operating systems, 7Z file format specifications7zip specifications, 7Z format Wikipedia entry7zip archive format, PPMdWikipedia prediction by partial matching and LZMA / LZMA2Lempel Ziv Markov chain algorithm data compression algorithms.

7-zip archives format

XZ extension identify a pure compression format (compresses a single file, without offering option of archiving multiple input file into a single output .xz file), it is based on LZMA/LZMA2 algorithm family, featuring usual 7z-like compression ratio (similar or higher compared to RAR), recently often used on TAR files.

PeaZip supports creation and extraction of 7z files: create, open, browse, and extract 7Z archives, convert any supported archive to 7z format and vice-versa.

what are 7z files

what are 7z archives


  



  

.7Z

Author Igor Pavlov, 1999

SPEED 7z archives specifications

7z format features average speed, computing intensive compression algorithms are balanced by efficient parallel programming implementation.







COMPRESSION RATIO what are 7z features

7z archives feature very good compression ratio. Comparable, often better than WinRar's RAR compression, but inferior to state of art PAQ compressor.

ADVANCED OPTIONS 7z specs
7z format features a good array of advanced options. Native support for AES encryption and UTF-8 encoding. Lacks recovery records option available for RAR format.








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FAQ > Archive file types > What are 7z files

Topics about what is 7Z file format, native 7-Zip archives type, and what are 7z extension features and specifications, characteristics, advantages and disadvantages compared to other archiving formats:
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Tag Cloud
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