7Zip is an open-source file archiver, that offers a 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). In addition, 7Zip also supports 7z, ZIP, CAB, RAR, ARJ, GZIP, BZIP2, TAR, CPIO, RPM and DEB formats, so it can be used with all popular archive files as well. 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 commandline support. Interface and additional features are fairly basic, but the compression ratio is outstanding.
- Changes in 4.57:
- The BUG in command line version was fixed: -up3 switch could work incorrectly.
- Changes in 4.56-Beta:
- Some bugs were fixed.
- Changes in 4.55-Beta:
- Some bugs were fixed
- Changes in 4.54-Beta:
- Decompression speed was increased.
- Changes in 4.52-Beta:
- 7-Zip now can unpack Compound files (msi, doc, ...).
- Some bugs were fixed
- There was bug in CAB decompressing code. So 7-Zip could not extract some CAB archives. Please call "Test" command in 7-Zip 4.52 for your CAB archives to check that fixed code is correct.
- Changes in 4.51-Beta:
- Bug was fixed: 7-Zip 4.50 beta could not open some .7z archives.
- Changes in 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.
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