Download 7-Zip 15.01 alpha

Version 15.01 alpha of 7-Zip has been released, as a successor to 9.38 beta. This open source archiver can handle a wide range of compression formats, including zip, cab, rar, arj, lzh, chm, gzip, bzip2, z, tar, cpio, rpm, deb and of course the proprietary 7z† Furthermore, the software is able to open iso files and nsis installation packages. The changelog for this release looks like this:

7-Zip 15.01 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 15.01 alpha, check 7-Zip’s forum periodically for updated information. If you need a more stable version, you can use previous version: 7-Zip 9.38 beta.

What’s new after 7-Zip 9.38 beta:

• 7-Zip now can create 7z, xz and zip archives with 1536 MB dictionary for LZMA/LZMA2.
• 7-Zip File Manager now can operate with alternate file streams at NTFS
• volumes via “File / Alternate Streams” menu command.
• 7-Zip 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:
• 7-Zip 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, 7-Zip used only first rename pair.
• The BUG was fixed:
• 7-Zip crashed for ZIP/LZMA/AES/AES-NI.
• Some bugs were fixed.