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7-Zip 22.01 – Free File Archiver

7-Zip 22.01 – Free File Archiver
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7-Zip is an open source file archiver with the high compression ratio predominantly for the Microsoft Windows operating system.

It operates either as a command line program or with a graphical user interface. It also features integration with the Windows shell environment.

Compression ratio results are very dependent upon the data used for the tests. Usually, 7-Zip compresses to 7z format 30-70% better than to zip format. And it compresses to zip format 2-10% better than most of other zip compatible programs.

7-Zip is free software, developed by Igor Pavlov and distributed under the GNU LGPL license. This file archiver works on all Windows operating systems, from Windows NT to 10 (32-bit and 64-bit).

The main features of 7-Zip:

  • High compression ratio in new 7z format with LZMA compression and LZMA2 compression
  • For ZIP and GZIP formats, the provided compression ratio 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 87 languages
  • Supported formats:
    • Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
    • Unpacking only: AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2, RAR, RPM, SquashFS, UDF, UEFI, VDI, VHD, VMDK, WIM, XAR and Z.

Changes in 7-Zip 22.01 (2022-07-16):

  • UDF support was improved to UDF version 2.60.
  • HFS and APFS support was improved.

Changes in 7-Zip 22.00 (2022-06-15):

  • 7-Zip now can extract APFS (Apple File System) images that can be used in DMG files.
  • 7-Zip now can create TAR archives in POSIX (pax) tar format with the switches
    -ttar -mm=pax or -ttar -mm=posix
  • 7-Zip now can store additional file timestamps with high precision (1 ns in Linux) in tar/pax archives with the following switches:
    -ttar -mm=pax -mtp=3 -mtc -mta
  • New switches for Linux version for TAR archives:
    -snoi : store owner/group ids in archive or set owner/group ids from archive to extracted files.
    -snon : store owner/group names in archive
  • New -snz switch to propagate Zone.Identifier stream to extracted files (Windows).
  • New option “Propagate Zone.Id stream” in Tools/Options/7-Zip menu.
  • New “Options” window in “Add to archive” allows to select what metadata must be included to archive. Also it allows to select new option
    “Do not change source files last access time”.
  • Some bugs were fixed.

Changes in 7-Zip 21.07 (2021-12-27):

  • 7-Zip now can extract VHDX disk images (Microsoft Hyper-V Virtual Hard Disk v2 format).
  • New switches: -spm and -im!{file_path} to exclude directories from processing for specified paths that don’t contain path separator character at the end of path.
  • In the “Add to Archive” window, now it is allowed to use -m prefix for “Parameters” field as in command line: -mparam.
  • The sorting order of files in archives was slightly changed to be more consistent for cases where the name of some directory is the same as the prefix part of the name of another directory or file.
  • TAR archives created by 7-Zip now are more consistent with archives created by GNU TAR program.

Changes in 7-Zip 21.06 (2021-11-25):

  • The window “Add to Archive” now allows to set a limit on memory usage (RAM) that will be used for compressing.
  • New switch -mmemuse={N}g / -mmemuse=p{N} to set a limit on memory usage (RAM) for compressing and decompressing.
  • Bug in versions 21.00-21.05 was fixed:
    7-Zip didn’t set attributes of directories during archive extracting.
  • Some bugs were fixed.

Changes in 7-Zip 21.04 Beta (2021-11-02):

  • 7-Zip now reduces the number of working CPU threads for compression, if RAM size is not enough for compression with big LZMA2 dictionary.
  • 7-Zip now can create and check “file.sha256” text files that contain the list of file names and SHA-256 checksums in format compatible with sha256sum program. 7-Zip can work with such checksum files as with archives, but these files don’t contain real file data.
    The context menu commands to create and test “sha256” files:
    7-Zip  /  CRC SHA  /  SHA-256 -> file.sha256
    7-Zip  /  CRC SHA  /  Test Archive : Checksum

The commands for command line version:

    7z a -thash file.sha256 *.txt
    7z t -thash file.sha256
    7z t -thash -shd. file.sha256 
  • New -shd{dir_path} switch to set the directory that is used to check files referenced by “file.sha256” file for “Test” operation. If -shd{dir_path} is not specified, 7-Zip uses the directory where “file.sha256” is stored.
  • New -xtd switch to exclude directory items from processing.

Homepage – https://www.7-zip.org

Supported Operating Systems:

  • Windows XP, Vista, 7, 8, 8.1, 10 (32-bit, 64-bit).
  • Windows Server 2003, 2008, 2012, 2016, 2019.