7-Zip 15.03 Alpha / 9.38 Beta / 7-Zip 9.20 Full Version Free Download
7-Zip is an open-source file archiver, that offers the highest compression ratio, using the new 7z format, which delivers compression results that are usually 30-50% better than standard ZIP. We tested it with a server log file, which compressed with ZIP had a file size of 18 mb and using 7-Zip was reduced to 8 Mb (results may vary, depending on file type). 7Zip supports 7z, ZIP, CAB, RAR, ARJ, GZIP, BZIP2, TAR, CPIO, RPM and DEB formats, so it can be used with all popular archive files. The program offers a basic file explorer interface and also integrates into the Windows right-click menu. It can be associated with any of the supported formats and also offers command/line support.
Changes in 7-Zip 15.01 Alpha (2015-05-16):
* 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.
* Some bugs were fixed.
* 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.
* Some bugs were fixed.
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