Sunday, October 7, 2007

7-Zip Free file archiver with High compression ratio

7-Zip is a file archiver with a high compression ratio.

The following table show 7-Zip's high compression ratio comparing with other popular tools.

Mozilla Firefox Google Earth
161 files
15,684,168 bytes
115 files
23,530,652 bytes
Compressed size Ratio Compressed size Ratio
7-Zip 4.23 (7z format) 4621135 100% 6109183 100%
WinRAR 3.50 5021556 109% 6824892 112%
CABARC 5.1 5131393 111% 7434325 122%
WinZip 10.0 beta (maximum-PPMd) 5277118 114% 8200708 134%
7-Zip 4.23 (zip format) 6222627 135% 8909446 146%
WinZip 10.0 beta (maximum-portable) 6448666 140% 9153898 150%

The main features are as belows,
  • High compression ratio in new 7z format with LZMA compression
  • Supported formats:
    • Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
    • Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, Z, CPIO, RPM, DEB and NSIS
  • For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip
  • Self-extracting capability for 7z format
  • Integration with Windows Shell
  • Powerful File Manager
  • Powerful command line version
  • Plugin for FAR Manager
  • Localizations for 63 languages
Moreover it provides a good file manager. See below snapshot.

You can download this good free file archiver here.


Alex said...

Often loss of information occurs on next reasons:viruses,hackers and system errors,to my mind in similar situation there is way-check zip file integrity,tool helped myself and friends not once,has free status as far as I can see,it permits to repair corrupted archives with *.zip extension,solve errors on example-CRC error and Cannot open file: it does not appear to be a valid archive,program for check repair zip file and check integrity of zip file uses several different algorithms for crc check fix zip file and data recovery, that is why, the process will take some time, according to CPU performance and file size,program will work under all supported versions of this operating system,will keep initial structure of your archive as well as original names of files and directories,check repair zip file can check why zip file is corrupted and work with password protected archives, but you should know this password.

Alexis said...

On my computer there are a lot of zip files.And yesterday all files were deleted no one know how.But I asked to friend about this situation.And he advised-repair zip file cyclic redundancy,this advice was successeful and tool solved my problems in a minute for free!!