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7-Zip 21.03 Beta / 7-Zip 19.00 – File Archiver

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7-Zip 21.03 Beta / 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

Changes in 7-Zip 21.03 Beta (2021-07-21):

  • The maximum dictionary size for LZMA/LZMA2 compressing was increased to 4 GB (3840 MiB).
  • Minor speed optimizations in LZMA/LZMA2 compressing.

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 –

Supported Operating Systems:

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

Leave a Reply

7 Comments on 7-Zip 21.03 Beta / 7-Zip 19.00 – File Archiver

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    "Verified" 7-Zip can extract RAR5 in Beta 15.06

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    From the developer Igor Pavlov: "Some modules from "Extra" package were moved to LZMA SDK. 7-Zip 9.35 beta for 99.99% is same code as 9.34 alpha. Only some bugs were fixed. My latest changes in code for 7-Zip are under development still, so they are not included to 7-Zip 9.35 beta. So now I have two branches of code: 9.35 and "next_version" code. It's more difficult to support two branches. But at least now I can fix simple bugs faster and release fixed versions." Looks like faster beta roll outs are coming.

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    Still having ISO issues and no RAR5 support.

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    Wow, 9.31 Alpha just locked up explorer testing a file.. Win7 64bit.

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    try 7zip sfx maker (freeware)  Thanks for the update.

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    7Zip does have a self extracting function. Use Add to Archive and in Options box you'll see 'Create SFX archive' check box.

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    Thanks for the update