7-Zip 9.34 alpha

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  • Igor Pavlov

    Igor Pavlov - 2014-06-22

    7-Zip 9.34 alpha was released.

    This is a development version.
    Don't use this alpha version to process important files and archives.
    The code of this version contains big number of changes.
    And probably there are some new BUGs.
    If you use 7-Zip 9.34 alpha, check 7-Zip's forum periodically for updated information.

    If you need more stable version, you can use previous versions: 7-Zip 9.25 alpha or 7-Zip 9.30 alpha.

    7-Zip for 32-bit Windows:


    7-Zip for 64-bit Windows x64:


    7z Library, SFXs for installers, Plugin for FAR Manager:


    7-Zip 9.34 alpha version is provided without source code.
    Source code will be released in future beta version.

    Please write here at forum about any new bugs.

    What's new after 7-Zip 9.33 alpha:

    • The BUG in 9.33 was fixed:
      Command line version of 7-Zip could work incorrectly, if there is relative
      path in exclude filename optiton (-x) and absolute path as include filename.
    • The BUG in 9.26-9.33 was fixed:
      7-Zip could not open some unusual 7z archives that were created by another
      software (not by 7-Zip).
    • The BUG in 9.31-9.33 was fixed:
      7-Zip could crash with switch -tcab.

    What's new after 7-Zip 9.32 alpha:

    • 7-Zip now can show icons for 7-Zip items in Explorer's context menu.
    • "Add to archive" dialog box:
      • new options in "Path Mode"
      • new option "Delete files after compression"
      • new "NTFS" options for WIM and TAR formats:
      • Store symbolic links
      • Store hard links
      • Store alternate data streams
      • Store file security
    • "Extract" dialog box:
      • new optional field to set output folder name
      • new option "Eliminate duplication of root folder"
      • new option "Absolute pathnames" in "Path Mode".
      • new option "Restore file security" (that works for WIM archives only)
    • 7-Zip File Manager:
      • new "File / Link" dialog box in to create symbolic links and hard links.
    • Command line version:
      • new -spd switch to Disable wildcard matching for file names
      • new -spe switch to Eliminate duplication of root folder for extract archive command
      • new -snh switch to store hard links as links (WIM and TAR formats only)
      • new -snl switch to store symbolic links as links (WIM and TAR formats only)
    • NSIS support was improved.
    • The problem was fixed:
      The command "extract to *" with multiple archives could use same
      output folder, if archives are placed inside PE (EXE) file.
    • The BUG of 9.31-9.32 was fixed:
      Command line version for test and extract commands returned the
      value 0 as exit code, if it couldn't open archive.
    • The BUG was fixed:
      7-Zip could not create archives with anti-items for any archive type,
      except of 7z type
    • Some bugs were fixed.
    • New localization: Mongolian (script).

    7z934.exe SHA-1:

    7z934.msi SHA-1:

    7z934-x64.msi SHA-1:

    7z934_extra.7z SHA-1:

    • Reddy

      Reddy - 2014-06-25

      @Igor Pavlov: Sorry to disturb you after installation me facing following issue when i try to open ZIP/RAR files. Can you help me with this issue. Thanks, in advance.

      Me using 7-Zip for 64-bit (Mine Config: Windows-64 bit)

      Last edit: Reddy 2014-06-25
    • txtsd

      txtsd - 2014-06-28

      I get errors 2503 and 2502 when I try to install 7z934-x64.msi
      Win8.1 x64

    • Nick Korotysh

      Nick Korotysh - 2014-09-11

      latest openssl sources archive can't be extracted correctly. there are some symlinks in archive (extracted on linux) and 7z gives errors on them.

      9.34-x64, win 8.1

      • Igor Pavlov

        Igor Pavlov - 2014-09-12

        Does it work, if you run 7-Zip with Administrator rights?

        • Nick Korotysh

          Nick Korotysh - 2014-09-12

          yes, this works correctly with administrator rights

          Last edit: Nick Korotysh 2014-09-12
    • grml4d

      grml4d - 2014-10-20

      i used Disk2vhd : http://technet.microsoft.com/en-us/sysinternals/ee656415.aspx
      to backup a 60 Go ssd with a fresh win7

      it created me a 7.20 GB (7,742,602,240 bytes) file in few minutes , i found that so incredible that i created a 60 Go vhd using disk management console and made a copy of my partition with a backup tool in this 60 Go vhd

      i used 7z 9.34 to compress it uzing 7z-lzma2 setting with 8Go of ram free and 16 threads, after 90 minutes or so , the resulting file is 13.0 GB (13,991,225,093 bytes)...

      i tried to create the archive on a 32 Go usb stick but quickly had a crashbox saying not enough disk-space . i created a sfx archive but if i launch it the mbox says that it is not a valid win32 application . i was able to extract file with 7z9.34 gui.

  • dimon4ezzz

    dimon4ezzz - 2014-06-22

    Ура! Новая версия!

  • gora2

    gora2 - 2014-06-22

    Standalone console archivers (7za and 7zr) have the same built-in help

    • Igor Pavlov

      Igor Pavlov - 2014-06-22

      Yes, both programs support all commands and most of switches.
      7zr.exe now supports also encryption.

      • gora2

        gora2 - 2014-06-22

        Clear. But headers should be different?

        7-Zip (a) 9.34 alpha Copyright (c) 1999-2014 Igor Pavlov 2014-06-22

        Usage: 7za [<switches>...] <archive_name> [<file_names>...]

        7-Zip (r) 9.34 alpha Copyright (c) 1999-2014 Igor Pavlov 2014-06-22

        Usage: 7zr [<switches>...] <archive_name> [<file_names>...]

        • Igor Pavlov

          Igor Pavlov - 2014-06-22

          Ok, I'll think about way to fix it.

          • Sr. Zé Alguém

            Sr. Zé Alguém - 2014-06-22

            What's the difference between them?

            • Igor Pavlov

              Igor Pavlov - 2014-06-23

              7zr.exe supports only lzma related formats (7z and xz)
              7za.exe supports also zip, bzip2, gzip2, Z, cab and tar.

              • gora2

                gora2 - 2014-06-23

                7za.exe supports also zip, bzip2, gzip2, Z, cab and tar.

                In readme no cab archives

                7-Zip Extra 9.34

                Features of 7za.exe:
                - High compression ratio in new 7z format
                - Supported formats:
                - Packing / unpacking: 7z, xz, ZIP, GZIP, BZIP2 and TAR
                - Unpacking only: Z, lzma

  • Byron Taz

    Byron Taz - 2014-06-22

    Thanks Again Igor,
    I hope I don't sound like a nag, but I asked about the poss. of a password keeper and never heard from you about if it is something you might add in the future or not. Like I said before cloud storage is getting more and more popular, and I always compress and password protect everything before I upload it.

    Thanks for you hard work either way.


    • foxpat

      foxpat - 2014-06-23

      Igor said in the first post:

      Please write here at forum about any new bugs.

  • Bruce Alexander

    Bruce Alexander - 2014-06-23

    Thanks for the new alpha Igor, but could you please consider adding an option to verify a password when an archive is being created using the command line version of 7-zip? At the moment a typo when typing the password can easily render the archive useless.

    • foxpat

      foxpat - 2014-06-23

      Igor said in the first post:

      Please write here at forum about any new bugs.

  • Sr. Zé Alguém

    Sr. Zé Alguém - 2014-06-23

    When one file is opened in 7-zip FM "Add" button in toolbar always give me error "Operation is not supported". Shouldn't it show explorer window for selecting files to add to the opened archive?

    • Igor Pavlov

      Igor Pavlov - 2014-06-23

      No, 7-Zip expects operation for selected files.

  • Fallon

    Fallon - 2014-06-23

    Context menu icons needing to be 13 wide for XP is news to me.
    Did 16x16 not work?
    (XP could not adjust bigger than 96x96 in Tiles Mode, that was an issue, I remember).
    Thanks for new updates!

    • Igor Pavlov

      Igor Pavlov - 2014-06-23

      As I understand there are several ways to show icon in menu. 7-Zip now uses simplest way via MENUITEMINFO::hbmpChecked. And XP shows only 13 pixels in that case. Another ways to show icon are more difficult to implement.

  • Fallon

    Fallon - 2014-06-23

    13x13 is good enough, until you want to look at it again. Thank you.

  • szfong

    szfong - 2014-06-23

    Nearest days - next alpha.
    If there are no critical bugs, beta with source code will be released in 1-2 weeks.
    Then probably I'll start to work for RAR5 decoding support.

    Hi Igor,

    You mentioned that after you release the beta code, you will be working on RAR5 decoding support.

    Does this mean you will once again be returning to alpha releases for the foreseeable future when you start adding features again, like what happened to v9.22 beta?

    Perhaps designating the source release beta as a "stable" release might let the net community know 7-Zip is still alive and development is still occurring... Just my opinion though...

    Last edit: szfong 2014-06-23
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