7-Zip 21.02 Alpha / 7-Zip 19.00 – File Archiver

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 21.02 Alpha (2021-05-06):

• 7-Zip now writes additional field for filename in UTF-8 encoding to zip archives.
  It allows to extract correct file name from zip archives on different systems.
• The command line version of 7-Zip for macOS was released.
• The speed for LZMA and LZMA2 decompression in arm64 versions for macOS and Linux was increased by 20%-60%.
• Some changes and improvements in ZIP, TAR and NSIS code.

Changes in 7-Zip 21.01 Alpha (2021-03-10):

• The command line version of 7-Zip for Linux was released.
• The improvements for speed of ARM64 version using hardware CPU instructions for AES, CRC-32, SHA-1 and SHA-256.
• The bug in versions 18.02 – 21.00 was fixed: 7-Zip could not correctly extract some ZIP archives created with xz compression method.
• Some bugs were fixed.

Changes in 7-Zip 21.00 Alpha (2021-01-19):

• Some internal changes in code.
• Some bugs were fixed.
• New localizations: Tajik, Uzbek (Cyrillic)

Changes in 7-Zip 20.02 Alpha (2020-08-08):

• The default number of LZMA2 chunks per solid block in 7z archive was increased to 64.
  It allows to increase the compression speed for big 7z archives, if there is a big number
  of CPU cores and threads.
• The speed of PPMd compressing/decompressing was increased for 7z/ZIP/RAR archives.
• The new -ssp switch. If the switch -ssp is specified, 7-Zip doesn’t allow the system
  to modify “Last Access Time” property of source files for archiving and hashing operations.
• Some bugs were fixed.
• New localization: Swahili.

Changes in 7-Zip 20.00 Alpha (2020-02-07):

• 7-Zip now supports new optional match finders for LZMA/LZMA2 compression: bt5 and hc5,
  that can work faster than bt4 and hc4 match finders for the data with big redundancy.
• The compression ratio was improved for Fast and Fastest compression levels with the
  following default settings:
  • Fastest level (-mx1) : hc5 match finder with 256 KB dictionary.
  • Fast level (-mx3) : hc5 match finder with 4 MB dictionary.
• Minor speed optimizations in multithreaded LZMA/LZMA2 compression for Normal/Maximum/Ultra
  compression levels.
• bzip2 decoding code was updated to support bzip2 archives, created by lbzip2 program.
• Some bugs were fixed.
• New localization: Turkmen.

Changes in 7-Zip 19.02 Alpha (2019-09-05):

• 7-Zip now can unpack files encoded with Base64 encoding (b64 filename extension).
• 7-Zip now can use new x86/x64 hardware instructions for SHA-1 and SHA-256, supported by AMD Ryzen and latest Intel CPUs: Ice Lake and Goldmont. It increases
  • the speed of SHA-1/SHA-256 hash value calculation,
  • the speed of encryption/decryption in zip AES,
  • the speed of key derivation for encryption/decryption in 7z/zip/rar archives.
• The speed of zip AES encryption and 7z/zip/rar AES decryption was increased with the following improvements:
  • 7-Zip now can use new x86/x64 VAES (AVX Vector AES) instructions, supported by Intel Ice Lake CPU.
  • The existing code of x86/x64 AES-NI was improved also.
• There is 2% speed optimization in 7-Zip benchmark’s decompression.
• Some bugs were fixed.

Changes in 7-Zip 19.00 (2019-02-22):

• Encryption strength for 7z archives was increased: the size of random initialization vector was increased from 64-bit to 128-bit, and the pseudo-random number generator was improved.
• Some bugs were fixed.

Homepage – https://www.7-zip.org

Supported Operating Systems:

• Windows NT, 2000, XP, Vista, 7, 8, 8.1, 10 (32-bit, 64-bit).
• Windows Server 2003, 2008, 2012, 2016.

Size: 1.16 MB

DOWNLOAD 7-Zip 21.02 Alpha for Windows 32-bit [exe]

DOWNLOAD 7-Zip 21.02 Alpha for Windows 64-bit [exe]

DOWNLOAD 7-Zip 21.02 Alpha for Windows ARM64 [exe]

DOWNLOAD 7-Zip 19.00 for Windows 32-bit [exe]

DOWNLOAD 7-Zip 19.00 for Windows 64-bit [exe]

DOWNLOAD 7-Zip 19.00 for Windows 32-bit [msi]

DOWNLOAD 7-Zip 19.00 for Windows 64-bit [msi]

DOWNLOAD 7-Zip Portable

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