Changelog

Version history of the 7Zip archiver.

19.00

  • 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.

18.06

  • The speed for LZMA/LZMA2 compressing was increased by 3-10%, and there are minor changes in compression ratio.
  • Some bugs were fixed.
  • The bug in 7zip 18.02-18.05 was fixed: there was memory leak in xz decoder.
  • 7zip 18.02-18.05 used only one CPU thread for bz2 archive creation.

18.05

  • The speed for LZMA/LZMA2 compressing was increased by 8% for fastest/fast compression levels and by 3% for normal/maximum compression levels.
  • 7zip now shows Properties (Info) window and CRC/SHA results window as “list view” window instead of “message box” window.
  • Some improvements in zip, hfs and dmg code.
  • Previous versions of 7zip could work incorrectly in “Large memory pages” mode in Windows 10 because of some BUG with “Large Pages” in Windows 10. Now 7zip doesn’t use “Large Pages” on Windows 10 up to revision 1709 (16299).
  • The vulnerability in RAR unpacking code was fixed (CVE-2018-10115).
  • Some bugs were fixed.

18.03 beta

  • The speed for single-thread LZMA/LZMA2 decoding was increased by 30% in x64 version and by 3% in x86 version.
  • 7zip now can use multi-threading for 7z/LZMA2 decoding, if there are multiple independent data chunks in LZMA2 stream.
  • 7zip now can use multi-threading for xz decoding, if there are multiple blocks in xz stream.
  • New localization: Kabyle.
  • Some bugs were fixed.

18.01

  • 7zip now can unpack DMG archives that use LZFSE compression method.
  • 7zip now doesn’t allow update operation for archives that have read-only attribute.
  • The BUG was fixed: extracting from tar with -si switch didn’t set timestamps for directories.
  • Some bugs were fixed.

18.00 beta

  • 7zip now can unpack OBJ/COFF files.
  • new -sse switch to stop archive creating, if 7zip can’t open some input file.
  • Some bugs were fixed.

17.01 beta

  • Minor speed optimization for LZMA2 (xz and 7z) multi-threading compression. 7zip now uses additional memory buffers for multi-block LZMA2 compression. CPU utilization was slightly improved.
  • 7zip now creates multi-block xz archives by default. Block size can be specified with -ms[Size]{m|g} switch.
  • xz decoder now can unpack random block from multi-block xz archives. 7zip File Manager now can open nested multi-block xz archives (for example, image.iso.xz) without full unpacking of xz archive.
  • 7zip now can create zip archives from stdin to stdout.
  • 7zip command line: @listfile now doesn’t work after — switch. Use -i@listfile before — switch instead.
  • The BUGs were fixed: 7zip could add unrequired alternate file streams to WIM archives, for commands that contain filename wildcards and -sns switch. 7zip 17.00 beta crashed for commands that write anti-item to 7z archive. 7zip 17.00 beta ignored “Use large memory pages” option.

17.00 beta

  • ZIP unpacking code was improved.
  • 7zip now reserves file space before writing to file (for extraction from archive). It can reduce file fragmentation.
  • Some bugs were fixed. 7zip could crash in some cases.
  • Internal changes in code.

16.04

  • The bug was fixed: 7zip 16.03 exe installer under Vista didn’t create links in Start / Programs menu.
  • Some bugs were fixed in RAR code.

16.03

  • Installer and SFX modules now use some protection against DLL preloading attack.
  • Some bugs were fixed in 7z, NSIS, SquashFS, RAR5 and another code.

16.02

  • 7zip now can extract multivolume ZIP archives (z01, z02, … , zip).
  • Some bugs were fixed.

15.14

  • 7zip File Manager:
    • The code for “Open file from archive” operation was improved.
    • The code for “Tools/Options” window was improved.
    • The BUG was fixed: there was incorrect mouse cursor capture for drag-and-drop operations from open archive to Explorer window.
  • Some bugs were fixed.
  • New localization: Yoruba.

15.12

  • The release version.

15.11 beta

  • Some bugs were fixed.

15.10 beta

  • The BUG in 9.21 – 15.09 was fixed: 7zip could ignore some parameters, specified for archive creation operation for gzip and bzip2 formats in “Add to Archive” window and in command line version (-m switch).
  • Some bugs were fixed.

15.09 beta

  • 7zip now can extract ext2 and multivolume VMDK images.
  • Some bugs were fixed.

15.08 beta

  • 7zip now can extract ext3 and ext4 (Linux file system) images.
  • Some bugs were fixed.

15.07 beta

  • 7zip now can extract GPT images and single file QCOW2, VMDK, VDI images.
  • 7zip now can extract solid WIM archives with LZMS compression.
  • Some bugs were fixed.

15.06 beta

  • 7zip now can extract RAR5 archives.
  • 7zip now doesn’t sort files by type while adding to solid 7z archive.
  • new -mqs switch to sort files by type while adding to solid 7z archive.
  • The BUG in 7zip File Manager was fixed: The “Move” operation to open 7z archive didn’t delete empty files.
  • The BUG in 15.05 was fixed: console version added some text to the end of stdout stream, is -so switch was used.
  • The BUG in 9.30 – 15.05 was fixed: 7zip could not open multivolume sfx RAR archive.
  • Some bugs were fixed.

15.05 beta

  • 7zip now uses new installer.
  • 7zip now can create 7z, xz and zip archives with 1536 MB dictionary for LZMA/LZMA2.
  • 7zip File Manager now can operate with alternate file streams at NTFS volumes via “File / Alternate Streams” menu command.
  • 7zip now can extract .zipx (WinZip) archives that use xz compression.
  • new optional “section size” parameter for BCJ2 filter for compression ratio improving. Example: -mf=BCJ2:d9M, if largest executable section in files is smaller than 9 MB.
  • Speed optimizations for BCJ2 filter and SHA-1 and SHA-256 calculation.
  • Console version now uses stderr stream for error messages.
  • Console version now shows names of processed files only in progress line by default.
  • new -bb[0-3] switch to set output log level. -bb1 shows names of processed files in log.
  • new -bs[o|e|p][0|1|2] switch to set stream for output messages; o: output, e: error, p: progress line; 0: disable, 1: stdout, 2: stderr.
  • new -bt switch to show execution time statistics.
  • new -myx[0-9] switch to set level of file analysis.
  • new -mmtf- switch to set single thread mode for filters.
  • The BUG was fixed: 7zip didn’t restore NTFS permissions for folders during extracting from WIM archives.
  • The BUG was fixed: The command line version: if the command “rn” (Rename) was called with more than one pair of paths, 7zip used only first rename pair.
  • The BUG was fixed: 7zip crashed for ZIP/LZMA/AES/AES-NI.
  • The BUG in 15.01-15.02 was fixed: 7zip created incorrect ZIP archives, if ZipCrypto encryption was used. 7zip 9.20 can extract such incorrect ZIP archives.
  • Some bugs were fixed.

9.38 beta

  • Some bugs were fixed.

9.36 beta

  • The BUG in command line version was fixed: 7zip created temporary archive in current folder during update archive operation, if -w{Path} switch was not specified. The fixed 7zip creates temporary archive in folder that contains updated archive.
  • The BUG in 9.33-9.35 was fixed: 7zip silently ignored file reading errors during 7z or gz archive creation, and the created archive contained only part of file that was read before error. The fixed 7zip stops archive creation and it reports about error.
  • Some bugs were fixed.

9.35 beta

  • The BUG was fixed: 7zip crashed during ZIP archive creation, if the number of CPU threads was more than 64.
  • The BUG in 9.31-9.34 was fixed: 7zip could not correctly extract ISO archives that are larger than 4 GiB.
  • The BUG in 9.33-9.34 was fixed: The option “Compress shared files” and -ssw switch didn’t work.
  • The BUG in 9.26-9.34 was fixed: 7zip File Manager could crash for some archives open in “Flat View” mode.
  • Some bugs were fixed.

9.34 alpha

  • The BUG in 9.33 was fixed: Command line version of 7zip 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: 7zip could not open some unusual 7z archives that were created by another software (not by 7zip).
  • The BUG in 9.31-9.33 was fixed: 7zip could crash with switch -tcab.

9.33 alpha

  • 7zip now can show icons for 7zip 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)
  • 7zip 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: 7zip could not create archives with anti-items for any archive type, except of 7z type
  • Some bugs were fixed.
  • New localization: Mongolian (script).

9.32 alpha

  • 7zip now can create multivolume SFX archives in 7z format. Standalone sfx module now can unpack external 7z archive with name that is matched to name of sfx module. For example, sfx module renamed to archive.exe can unpack archive.7z or archive.7z.001 .
  • ZIP, NSIS, HFS, AR support was improved.
  • 7zip now supports files larger than 4 GiB in ISO archives.
  • Improved compression ratio in 7z format with maximum or ultra level for executable files (EXE and DLL) that are larger than 16 MB (improved BCJ2 filter).
  • Improved support for file pathnames longer than 260 characters.
  • CRC and SHA checksum calculation for files can be called via Explorer’s context menu.
  • 7zip File Manager now also takes into account the numbers in filenames for sorting order.
  • 7zip File Manager now can use RAM buffers instead of temp files to open nested archives, if temp file is smaller than 1/4 of RAM size.
  • 7zip File Manager can open files in “Parser” mode via “Open Archive > #” context menu command. It shows the list of archives inside file.
  • Command line version:
    • new -t# switch to open file in “Parser” mode and show the list of archives inside file.
    • new -stx{Type} switch to exclude archive type from using.
    • -scs switch now supports UTF-16 encoding.
    • now it shows time and memory usage statistics at the end of execution.
  • The BUGs were fixed:
    • 7zip 9.30 and early versions created ZIP archives with minor errors in extra field of headers for directory items, if AES (WinZip-AES) encryption was used.
    • 7zip could work incorrectly in decompression of more than one multi-volume archive in one command.
    • 7zip 9.24 alpha – 9.30 alpha versions could not extract ZIP archives encrypted with PKWARE-AES method.
  • Minimum supported system now is Windows 2000. 7zip doesn’t work on Windows 95/98/ME.
  • New localization: Irish.

9.30 alpha

  • LZMA2 now is default compression method for .7z format.
  • 7zip now can update WIM archives.
  • 7zip File Manager now can move files to archives.
  • The default encoding for TAR format now is UTF-8. You can use -mcp=1 switch for OEM encoding.
  • Command line version:
    • new “rn” command to rename files in archive.
    • new -sdel switch to delete files after including to archive.
    • new -sns switch to store NTFS alternate streams (for WIM format only).
    • new -sni switch to store NT security information for files (for WIM format only).
    • new -stl switch to set archive timestamp from the most recently modified file.
  • Speed optimizations for opening big archives and big disk folders.
  • 7zip now writes special padding blocks to headers of 7z archives for faster archive opening. Note that 7zip 4.50 – 4.58 contain BUG, so these old versions can’t correctly work with such new 7z archives.
  • DMG support was improved
  • Some bugs were fixed.
  • The BUG in 7zip 9.26 alpha – 9.29 alpha versions was fixed. These alpha versions could not open non-solid 7z archive, if some files were skipped during creation of that archive. That problem is also related to 7z archives created in solid mode, if each solid block contains no more than one file. Note: 7zip skips files that were open for writing by another application and shows warning in that case.
  • New localization: Aragonese.

9.25 alpha

  • LZMA decompression speed was improved.
  • “compress and send to email” code was improved to support more email clients.
  • New command “h” to calculate hash values CRC-32, CRC-64, SHA-256 or SHA-1 for files on disk.
  • New -spf switch to store full file paths including drive letter to archive. If you use that switch with extract command, please check that file names in archive are correct.
  • Some bugs were fixed.

9.23 alpha

  • The format of language files was changed.
  • Some bugs were fixed.
  • New localization: Karakalpak.

9.22 beta

  • 7zip now uses progress indicator displayed on a taskbar button under Windows 7.
  • The BUG in 7zip 9.21 beta was fixed: 7zip could ignore some options when you created ZIP archives. For example, it could use ZipCrypto cipher instead of AES-256.

9.21 beta

  • 7zip now can unpack UEFI BIOS files.
  • 64-bit version of 7zip now includes additional 32-bit shell extension DLL. So other 32-bit programs can call 64-bit 7zip via context menu.
  • Now it’s possible to associate 7zip with file types without Administrator rights.
  • New -mf=FilterID switch to specify compression filter. Examples: 7z a -mf=bcj2 a.7z a.tar 7z a -mf=delta:4 a.7z a.wav 7z a -mf=bcj a.tar.xz a.tar
  • 32-bit 7zip running under 64-bit Windows now can use up to 4 GB of RAM.
  • Some bugs were fixed.
  • New localizations: Corsican, Kyrgyz, Ligurian.

9.20

  • Some bugs were fixed.

9.19 beta

  • The console version now doesn’t show entered password.
  • Some bugs were fixed.

9.18 beta

  • 7zip now can unpack SquashFS and CramFS filesystem images.
  • 7zip now can unpack some TAR and ISO archives with incorrect headers.
  • New small SFX module for installers (in Extra package).
  • Some bugs were fixed.

9.17 beta

  • Disk fragmentation problem for ZIP archives created by 7zip was fixed.

9.16 beta

  • 7zip now supports files that are larger than 8 GB in TAR archives.
  • NSIS support was improved.
  • Some bugs were fixed.
  • New localizations: Hindi, Gujarati, Sanskrit.

9.15 beta

  • Some bugs were fixed.
  • New localization: Tatar.

9.14 beta

  • WIM support was improved.

9.13 beta

  • 7zip now stores NTFS file timestamps to ZIP archives.
  • New additional “Open archive >” item in context menu allows to select archive type for some files.
  • Some bugs were fixed.
  • New localization: Uyghur.

9.12 beta

  • ZIP / PPMd compression ratio was improved in Maximum and Ultra modes.
  • The BUG in 7zip 9.* beta was fixed: LZMA2 codec didn’t work, if more than 10 threads were used (or more than 20 threads in some modes).

9.11 beta

  • 7zip now supports PPMd compression in ZIP archives.
  • Speed optimizations in PPMd codec.
  • The support for archives in installers was improved.
  • Some bugs were fixed.
  • New localization: Kazakh.

9.10 beta

  • The BUG in 7zip 9.09 beta was fixed: 7zip created incorrect ZIP archives, if ZipCrypto encryption was used.

9.09 beta

  • 7zip now can unpack Apple Partition Map (APM) disk images.
  • Speed optimizations in AES code for Intel’s 32nm CPUs.
  • Speed optimizations in CRC calculation code for Intel’s Atom CPUs.
  • Some bugs were fixed.

9.07 beta

  • It’s possible to specify Diff program in options (7zip File Manager).
  • Some bugs were fixed.

9.06 beta

  • 7zip now can unpack MSLZ archives.
  • Partial parsing for EXE resources, SWF and FLV.
  • Some bugs were fixed.

9.04 beta

  • 7zip now can update solid .7z archives.
  • 7zip now supports LZMA2 compression method.
  • 7zip now supports XZ archives.
  • 7zip now can unpack NTFS, FAT, VHD and MBR archives.
  • 7zip now can unpack GZip, BZip2, LZMA, XZ and TAR archives from stdin.
  • 7zip now can open/copy/compress disk images (like \.\c:) from \.\ folder.
  • 7zip File Manager now doesn’t use temp files to open nested archives stored without compression.
  • New -scrc switch to calculate total CRC-32 during extracting / testing.
  • New -scc{WIN|DOS|UTF-8} switch to specify charset for console input/output (default = DOS).
  • Some bugs were fixed.

4.65

  • 7zip File Manager now can calculate SHA-256 checksum.
  • Some bugs were fixed.

4.64

  • The bug in 7zip 4.63 was fixed: 7zip could not decrypt .ZIP archives encrypted with WinZip-AES method.

4.63

  • 7zip now can unpack ZIP archives encrypted with PKWARE-AES.
  • Some bugs were fixed.

4.62

  • Some bugs were fixed.

4.61 beta

  • 7zip now supports LZMA compression for .ZIP archives.
  • Some bugs were fixed.
  • New localization: Sinhala.

4.60 beta

  • Some bugs were fixed.

4.59 beta

  • 7zip now can unpack UDF, XAR and DMG/HFS archives.
  • 7zip File Manager now keeps encryption when you edit encrypted file inside archive.
  • 7zip File Manager now allows to change current folder from the address bar drop-down list.
  • It’s allowed to use -t switch for “list” and “extract” commands.
  • Some bugs were fixed.
  • New localizations: Icelandic, Kurdish Sorani.

4.58 beta

  • Some speed optimizations.
  • 7zip now can unpack .lzma archives.
  • Unicode (UTF-8) support for filenames in .ZIP archives. Now there are 3 modes:
    1. Default mode: 7zip uses UTF-8, if the local code page doesn’t contain required symbols.
    2. -mcu switch: 7zip uses UTF-8, if there are non-ASCII symbols.
    3. -mcl switch: 7zip uses local code page.
  • Now it’s possible to store file creation time in 7z and ZIP archives (-mtc switch).
  • 7zip now can unpack multivolume RAR archives created with “old style volume names” scheme and names *.001, *.002, …
  • Now it’s possible to use -mSW- and -mSW+ switches instead of -mSW=off and -mSW=on
  • Some bugs were fixed.
  • New localizations: Punjabi (Indian), Pashto.

4.57

  • The BUG in command line version was fixed: -up3 switch could work incorrectly.

4.56 beta

  • Some bugs were fixed.

4.55 beta

  • Some bugs were fixed.

4.54 beta

  • Decompression speed was increased.

4.53 beta

  • “Test” and “Info” buttons now work for open archives.
  • The bug in 7zip 4.48 – 4.52 beta was fixed: 7zip could create .ZIP archives with broken files.
  • Some bugs were fixed.

4.52 beta

  • 7zip now can unpack Compound files (msi, doc, …).
  • Some bugs were fixed.

4.51 beta

  • Bug was fixed: 7zip 4.50 beta could not open some .7z archives.

4.50 beta

  • New switch for command line version: -ssc[-] enables/disables case-sensitive mode for file names.
  • Speed optimizations for AES encryption.
  • Some bugs were fixed.

4.49 beta

  • 7zip now can unpack WIM archives.
  • 7zip now replaces incorrect characters in filenames during extracting.

4.48 beta

  • Encryption strength for .7z format was increased. Now it uses random initialization vectors.
  • Some bugs were fixed.

4.47 beta

  • Bugs of 7zip 4.46 beta were fixed: BZip2 could work incorrectly.

4.46 beta

  • New fast compression mode for Deflate method in Zip and GZip.
  • New “Compress shared files” option in GUI and -ssw switch.
  • Some bugs were fixed.
  • New localization: Norwegian Nynorsk.

4.45 beta

  • Now it’s possible to specify the size of solid block and the number of CPU threads in “Add to archive” dialog box.
  • Default dictionary size was increased: Normal: 16 MB, Max: 32 MB.
  • Speed optimizations.
  • Benchmark was improved (new “b” command in command line version).
  • The number of DLL files was reduced.
  • Now it’s possible to associate 7zip with combined types like .tbz2
  • switch -mhcf=off is not supported now.
  • If -t{Type} switch is not specified, 7zip now uses extension of archive to detect the type of archive.
  • Some bugs were fixed.
  • New localization: Welsh.

4.44 beta

  • Speed optimizations for LZMA, Deflate, BZip2 and unRAR.
  • 7zip now supports file pathnames longer than 260 characters.
  • Some bugs were fixed.
  • New localizations: Bangla, Bashkir, Nepali.

4.43 beta

  • 7zip now can use multi-threading mode for compressing to .ZIP archives.
  • ZIP format supporting was improved.
  • 7zip now supports WinZip-compatible AES-256 encryption for .ZIP archives.
  • New context menu items for .ZIP archives creating.
  • 7zip now uses order list (list of extensions) for files sorting for compressing to .7z archives. It can slightly increase compression ratio in some cases.
  • 7zip now restores modification time of folders during .7z archives extracting.
  • Some bugs were fixed.
  • New localizations: Armenian, Marathi.

4.42

  • Compressing speed and Memory requirements were increased. Default dictionary size was increased: Fastest: 64 KB, Fast: 1 MB, Normal: 4 MB, Max: 16 MB, Ultra: 64 MB.
  • BZip2 compressing / decompressing now can work in multi-threading mode
  • Multi-threading mode now is default for multi-processor systems
  • 64-bit version now supports 1 GB dictionary
  • 7z/LZMA now can use only these match finders: HC4, BT2, BT3, BT4
  • Compression ratio in Zip/GZip/Deflate in Ultra mode was increased
  • 7zip now can unpack ISO archives and some installers created by NSIS
  • Optional “Flat View” mode in 7zip File Manager
  • 7zip File Manager now can calculate CRC checksums for files
  • -x switch with relative paths now affects files specified with absolute paths
  • New switch for 7za.exe (console version): -slt. “l” (list) command with -slt shows technical information for archive.
  • New switch: -scs{WIN|DOS|UTF-8} specifies charset for list files. Default charset for list files is UTF-8 now.
  • Some bugs were fixed
  • New localizations: Albanian, Kurdish

4.32

  • Bug was fixed: 7zip 4.31 didn’t work in Windows 95

4.31

  • Small changes
  • New localization: Basque

4.30 beta

  • Files 7zFMn.exe, 7zGn.exe, 7zipn, 7za.exe, 7zC.sfx were removed from 7zip package
  • 7zip now uses uncompressed SFX: 7z.sfx
  • Sfx modules 7z.sfx and 7zCon.sfx now use msvcrt.dll
  • Speed optimizations in LZMA maximum/ultra compressing.
  • LZMA now supports word size up to 273
  • 7zip now reduces dictionary size for LZMA, if you compress files smaller than specified dictionary size.
  • 7zip now can use large memory pages: GUI: 7zip File Manager / Options / Settings / Use large memory pages. Command line version: -slp switch. This feature allows to increase speed of compressing. But 7zip can make some pause at starting of compressing for allocating large pages. Also Task Manager doesn’t show real memory usage of program, if 7zip uses large pages. This feature works only on Windows 2003 / XP x64 / Vista. Also you must have administrator’s rights for your system. Recommended size of RAM: 1 GB or more. To install this feature you must run 7zip File Manager at least once, close it and reboot system.
  • Some bugs were fixed

4.29 beta

  • Bug was fixed: 7zip 4.28 beta worked incorrectly in Windows 95/98/Me

4.28 beta

  • Bug was fixed: 7zip 4.27 beta created incorrect multivolume archives.
  • “Duplicate filename” collision problem between names with ligatures was fixed.

4.27 beta

  • 7zip can unpack CHM/HXS (MS HTML HELP) archives
  • 7zip can unpack multivolume CAB archives
  • Now 7zip deletes files to the Recycle Bin by default. Shift+Delete deletes files permanently.
  • Some bugs were fixed
  • New localization: Tatarish

4.26 beta

  • LZH format support (extracting only)
  • Some bugs were fixed
  • New localization: Ido

4.25 beta

  • 7zip now doesn’t interrupt the compressing when it can not find specified file as in version 4.24 beta. It just shows warning.
  • 7zip now supports standard selection mode in the file list
  • Some bugs were fixed

4.24 beta

  • 7zip now supports right-click Drag and Drop in Explorer
  • Command line version now supports short file names (like FILENA~1.TXT)
  • If there are no wildcard names and there is no -r switch in command line, 7zip now checks that specified files exist on disk before compressing.
  • Some bugs were fixed

4.23

  • Drag and Drop support
  • 7zip File Manager now can copy files from one archive to another
  • Some bugs were fixed
  • New localizations: Extremaduran, Malay

4.20

  • No changes

4.19 beta

  • BZip2 code was rewritten. Now it supports 3 modes: Normal, Maximum and Ultra. In Normal mode it compresses almost as original BZip2 compressor. Compression ratio in Maximum and Ultra modes is 1-3% better for some files, but Maximum Mode is about 3 times slower and Ultra Mode is about 8 times slower than Normal mode.
  • Console version now prints all messages to stdout by default, and if -so switch is specified, 7zip prints messages to stderr.
  • Some bugs were fixed
  • New localizations: Azeri, Georgian

4.18 beta

  • Bug in v4.17 beta was fixed: 7zip File Manager could crash after some operations with archives

4.17 beta

  • To increase protection from viruses, 7zip now does not open files with more than 4 continuous spaces in the name. And 7zip changes such long spaces in name to ” … ” in the file list.
  • Code size optimization
  • Some files were moved from main package to extra package:
    • Plugin for FAR Manager
    • SFX modules for installers (7zS.sfx and 7zSD.sfx)
  • New localizations: Asturian, Indonesian

4.16 beta

  • Speed optimization (5%) for 7z / LZMA
  • 7za.exe now supports .Z archives
  • -r- switch in command line now is default for all commands
  • Some bugs were fixed
  • New localization: Uzbek

4.15 beta

  • Z format supporting (extracting only)
  • 7zip now can extract ZIP archives compressed with “Shrink” method
  • 7zip now doesn’t interrupt the compressing when it can not open file. 7zip just skips that file and shows warning.
  • Some bugs were fixed
  • New localization: Frisian

4.14 beta

  • 7zip installer was created with NSIS. Now it installs 7zip for all users (under Windows 2000/XP).
  • Now 7zip can create multivolume archives (switch -v for command line)
  • Some bugs were fixed
  • New localizations: Breton, Farsi

4.13 beta

  • Switch “–” stops switches parsing
  • Some bugs were fixed

4.12 beta

  • Bug in v4.11 beta was fixed: 7zip created incorrect ZIP archives if file size was from 3.75 GB to 4 GB.

4.11 beta

  • 7zip now shows file names during compressing/decompressing
  • 7zip now supports Zip64 extension of ZIP format. So now it’s possible to compress files bigger than 4 GB to ZIP archives.
  • Some bugs were fixed
  • New localization: Galician

4.10 beta

  • Bugs in v4.0* were fixed:
    • Some commands in command line with “-r” switch worked incorrectly, so 7zip could skip some files during compressing
    • Some other bugs were fixed
  • Small internal changes

4.09 beta

  • Bugs in v4.0* were fixed:
    • Renaming inside archives didn’t work or worked incorrectly
    • GUI SFX didn’t show extracting dialog at start
  • Small fixes in 7zip GUI (7zG.exe)

4.08 beta

  • Bug in installer for v4.07 was fixed: when rebooting is required, it rebooted without asking user
  • Small fixes in 7zip GUI (7zG.exe)

4.07 beta

  • Big amount of code was changed in this beta version. So don’t use it for important data compressing. And test archive after compressing.
  • Unified command line interface to GUI and console versions
  • 7zip now can extract or test several archives in one command
  • 7zip now doesn’t interrupt the compressing when file is locked by other application. 7zip just skips that file and shows warning. Note: previous versions of 7zip had bug, so they can not unpack non-solid and some solid 7z archives with such skipped files.
  • Command line interface was changed:
    • now it’s possible to use absolute pathnames
    • syntax simplification: was: 7z a a Folder1* Folder2* -r now: 7z a a Folder1 Folder2
    • now it’s possible to use complex wildcard commands, like *111*
  • More smart detection of archive type for files with unusual file name extensions
  • Supporting for RAR archives with encrypted headers
  • CPIO format supporting was improved
  • For GZip and BZip2 formats you can:
    • Compress from stdin (-si switch)
    • Compress to stdout (-so switch)
    • Extract to stdout (-so switch)
  • 7zip File Manager:
    • Split and Combine commands
    • new list view options: Full row select, Show grid lines
  • Internal reconstruction
  • Some bugs were fixed
  • New localizations: Friulian, Macedonian, Mongolian, Tamil, Thai

3.13

  • Some small bugs were fixed

3.12

  • Now you can select compression method, dictionary size and word size in “Add to archive” dialog box. Also it shows memory usage.
  • 7zip File Manager now contains toolbars.
  • New “Benchmark” command in 7zip File Manager. It measures compressing and decompressing speeds and shows rating values.
  • Some bugs were fixed.

3.11

  • 7zip now use limitations for solid block size for increasing the speed of random file decompressing:
    • in Store mode: 0 B
    • in Fast mode: 16 MB
    • in Normal mode: 256 MB
    • in Maximum mode: 1 GB
    • in Ultra mode: 4 GB
  • 7z.exe, 7za.exe and SFX modules now support Unicode file names under Windows NT/2000/XP/2003. 7zn.exe and 7zan.exe were removed from package.
  • Some bugs were fixed
  • New localization: Afrikaans

3.10

  • Drag-and-Drop from external application
  • GUI version (7zG.exe) can compress files with absolute paths
  • Compression dialog doesn’t suggest bzip2 and gzip2 types when there are more than one selected file
  • Optional auto renaming for existing files during extraction in command line version (-aot switch).
  • Some bugs were fixed

3.09.02

  • Optional limitation for solid block size for increasing the speed of random file decompressing (-ms switch)

3.09.01 beta

  • Automatic compression filter for executable files: dll, exe, ocx, sfx, sys, (-mf switch)
  • Compression levels in 7z now are:
    • Fast: 32 KB dictionary, BCJ filter
    • Normal: 2 MB dictionary, BCJ filter
    • Maximum: 8 MB dictionary, BCJ filter, max settings
    • Ultra: 32 MB dictionary, BCJ2 filter, max settings
  • Updating solid 7z archives now is supported, if it doesn’t require repacking solid blocks
  • -mhcf switch for 7z format now is default
  • Some bugs were fixed

3.08.04 beta

  • Favorites menu in 7zip File Manager
  • Some bugs were fixed

3.08.03 beta

  • Automatic adding of extension to archive name in Compress Dialog
  • Some bugs in previous 3.08.* versions were fixed:
    • Storing columns width inside archives in File Manager
    • Opening archive inside archive
    • Quotes in list files in console version

3.08.02 beta

  • Some bugs were fixed

3.08 beta

  • Compress dialog:
    • Supporting fast compressing mode (-mx=1 switch)
    • Multi-threading option for Multi-Processor systems or Pentium 4 with Hyper-Threading
    • Encrypt file names option
  • New context menu items:
    • Extract here
    • Extract to
    • Compress and email
  • Internal reconstruction, registry using was reduced
  • New localization: Esperanto

2.30 Beta 32

  • New features in compressing / decompressing window.
  • “Show password” option.
  • Some other small changes.
  • New localization: Valencian.

2.30 Beta 31

  • Some bugs were fixed.

2.30 Beta 30

  • 7zip File Manager:
    • Showing .. item.
    • 1/2 Panels mode switching (F9).
  • Supporting Bzip2 compression in ZIP archives.
  • Some bugs were fixed.
  • Some optimization recompiling for reducing code size.

2.30 Beta 29

  • 7zip File Manager:
    • “7zip” and “System” submenus in “Files” menu.
    • Path history and “Browse” button in “Copy” dialog.
  • RAR supporting was improved.
  • Some bugs were fixed.
  • Small changes in LZMA code.
  • New localizations: Hebrew, Vietnamese.

2.30 Beta 28

  • Some bugs were fixed:
    • Updating 7z archives that are larger than 4 GB.
    • Using anti-items in 7z format.
    • Compressing empty files with password to zip format.
  • In max mode 7z now uses 8 MB dictionary instead of 4 MB.
  • 7zip File Manager:
    • Supporting file comments: Ctrl-Z.
    • New key alias for folder bookmarks: [Shift]+Alt+Number.

2.30 Beta 27

  • Two BUGs in two previous beta versions (Beta 25 and Beta 26) were fixed:
    1. Incorrect compressing to non-solid 7z archive when files have some very big sizes: 4 GB, 8 GB, 12 GB, 16 GB, …
    2. Incorrect percent showing in 7z compressing when files are bigger than 4 GB.
  • Supporting multivolume RAR and SPLIT archives.
  • Supporting DEB archives.
  • Supporting old version of CPIO format.
  • Some bugs were fixed.
  • New localizations: Korean, Swedish.

2.30 Beta 26

  • Supporting Deflate64 method in Zip archives.
  • Supporting Rar 1.50 archives.
  • Some bugs were fixed.

2.30 Beta 25

  • Encryption feature for 7z format (AES-256).
  • New optional archive header compressing mode (-mhcf).
  • Archive headers now always are compressed with LZMA method.
  • Updating non-solid 7z archives without -ms=off now is allowed.
  • Folder creating and item renaming inside archive now is supported.
  • Supporting encrypted Rar3 archives.
  • Supporting Unicode names in Rar3 archives.
  • Some bugs were fixed.
  • New localizations: Lithuanian, Voro.

2.30 Beta 24

  • Some internal reconstructions.
  • -m switch syntax was slightly changed.
  • Some bugs were fixed.
  • New localizations: Catalan, Norwegian, Romanian.

2.30 Beta 23

  • Encryption feature for zip format.
  • Percent indicating for some operations.
  • Some bugs were fixed.

2.30 Beta 22

  • New program: 7zip File Manager.
  • Command line version now doesn’t allow absolute paths for compressing files.
  • New localizations: Belarusian, Greek.
  • Bug in FAR plugin was fixed: Incorrect updating when archive has no explicit directory items for file items.
  • Some bugs were fixed.

2.30 Beta 21

  • RAM requirements for LZMA (7z) compression were reduced.
  • Small bug in FAR plugin was fixed.

2.30 Beta 20

  • RAM requirements for LZMA (7z) decompression were reduced.
  • New localization: Turkish.
  • Some bugs were fixed.

2.30 Beta 19

  • Supporting RAR 3.0 archives.
  • New localizations: Danish, Ukrainian.

2.30 Beta 18

  • Compressing speed in 7z format was slightly increased.
  • New localizations: Estonian, Finnish.
  • Some bugs were fixed.

2.30 Beta 17

  • Supporting ARJ archives.
  • New localization: Chinese Simplified.

2.30 Beta 16

  • Supporting RPM and CPIO archives.
  • New fast compression mode for LZMA: -m0a=0.
  • New match finders for LZMA: bt4b, hc3, hc4.
  • Some bugs were fixed.

2.30 Beta 15

  • Compression ratio in 7z was slightly improved.
  • New localization: Dutch.

2.30 Beta 14

  • Speed optimization for multiprocessor computers (-mmt switch).
  • New localizations: Czech, Japanese, Polish.
  • Some bugs were fixed.

2.30 Beta 13

  • New SFX module for installers.
  • New match finder for LZMA: bt3.
  • New localizations: Portuguese, Portuguese Brazil, Serbo-Croatian.
  • Some bugs were fixed.

2.30 Beta 12

  • Bug was fixed: memory leak in Beta 11.
  • New localization: Hungarian.

2.30 Beta 11

  • Archive testing feature for GUI version.
  • Now 7zip can use more than 256 MB of RAM in all Windows versions.
  • New localizations: Bulgarian, Chinese Traditional, Latvian, Slovak.
  • Some bugs were fixed.

2.30 Beta 10

  • Bugs were fixed:
    • Updating 7z archives in Beta 8 and 9 didn’t work.
    • Unicode version in Beta 9 didn’t work in Windows NT4.
    • Some other bugs were fixed.
  • New localizations: Arabic, French, Italian, Slovenian, Spanish.

2.30 Beta 9

  • Program localization: English, German, Russian.
  • Additional optimized versions of programs for Windows NT4/2000/XP.
  • Two new match finders for LZMA: pat3h and pat4h.
  • Some bugs were fixed.

2.30 Beta 8

  • 7zip now supports some zip archives that were not supported by previous versions.
  • 7zip now supports new state (-uw switch) for cases when 7zip can not detect whether file is newer or the same.
  • Supporting anti-items in 7z format for incremental update (-u with action #3).
  • Some bugs were fixed.

2.30 Beta 7

  • BCJ2: new converter for x86 code.
  • Supporting tar archives with very long file names (GNU extension to ‘tar’ format).
  • Supporting multistream coders in 7z (-mb switch).
  • More compressing parameters for zip and gzip in console version (-m switch).
  • Solid compressing option in Windows version.
  • Compressing parameters option in Windows version.
  • Auto renaming existing files feature for extracting files.
  • Overwrite mode switch for extracting (-ao).
  • Some bugs were fixed.

2.30 Beta 6

  • Supporting 7z format in MultiArc plugin for FAR Manager.
  • Some bugs were fixed.

2.30 Beta 5

  • Creating SFX archives from explorer.
  • 7zWin.sfx: Windows version of SFX module.
  • Auto adding .exe extension to SFX archive name.
  • 7za.exe now supports 7z, bzip2, gzip, tar, zip.
  • Some bugs were fixed.

2.30 Beta 4

  • Self extract capability for 7z format.
  • 7z archive format is default for 7z.exe and 7za.exe.
  • 7z in default mode now uses bt234 match finder and solid compression.
  • 7z in maximum mode (-mx) now uses 4MB dictionary.

2.30 Beta 3

  • Bug was fixed: decompressing .7z solid archives containing empty files.
  • new 7za.exe: standalone command line version (only for 7z format).
  • Speed of compressing to Deflate format (zip, gzip) was slightly increased.

2.30 Beta 2

  • Supporting the new 7z format with high compression ratio.
  • -bd (Disable percentage indicator) switch in console version.
  • Bug in console version was fixed: previous versions incorrectly execute compression commands with non-recursive wildcards in combination with subfolders.
  • Some other bugs were fixed.

2.30 Beta 1

  • Speed of reading of archive contents was increased.
  • Bug was fixed: incorrect showing file names with national charsets in some zip archives.
  • Now it is possible to compress files larger than 4GB to GZip archives.

2.24

  • Bugs in GZip and Cab decoders were fixed.

2.23

  • Opening archive items in Explorer.
  • Context menu for archive items in Explorer.
  • Automatic adding extension to archive name in console version.
  • Some bugs were fixed.

2.22

  • Supporting Zip archives containing more than 65535 files.
  • Speed of Plugin for Explorer was increased.
  • Searching start position of archive now is limited by first 1MB part of file.
  • Some bugs were fixed.
  • Packet now doesn’t contain 7zip.exe, far7zip.reg and far7zip2.reg files. There is new far7z.reg file.

2.21

  • FAR Plugin was improved:
    • Showing process box during opening archives.
    • Viewing properties of file by Ctrl-A.
    • Alt-F6 in archive now immediately extracts selected files to current directory.
  • Some bugs were fixed:
    • Entering to archive’s subfolders in Explorer by clicking items in main window didn’t work under Windows ME/2000.
    • Decompressing solid Rar archives sometimes gave error.
    • Console version 7z.exe during list operation incorrectly showed file names with national (non-english) charsets.
    • FAR Plugin didn’t execute some operations.
    • Showing percents during extracting ZIP archives sometimes was incorrect.

2.20

  • Supporting BZip2 and Cab.
  • New program architecture with external compression and cryptographic modules.
  • Decryption support (Rar and Zip).
  • New console client.
  • Some bugs were fixed.

2.11

  • Bugs were fixed:
    • FAR Plugin incorrectly processed names of subdirectories that use national (non-english) charsets.
    • gzip plugin could not compress empty files.

2.10

  • First level 7zip Plugin for FAR Manager.
  • GUI version with integration to Windows Shell.
  • Compression and decompressing GZip and TAR formats.
  • Decompression RAR.
  • Install & Uninstall support.
  • Some bugs were fixed.

2.01

  • Small bug was fixed.
  • Compression ratio was improved for some files.

2.00

  • Release.
  • Big bug was fixed: previous versions incorrectly worked during compressing with files that were referred by direct(without wildcards) paths, containing subdirs parts.
  • Compression and decompression speed were improved.
  • -mx switch (maXimize compression) was added.
  • Small bugs were fixed.

2.00 Beta 1

  • Original beta version.

End of document