7-Zip – The High Compression Ratio Zip
7-Zip is a file archiver with the high compression ratio.
The main features of 7-Zip:
- 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 compression ratio that is 2-10 % better than 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
Source: www.7-zip.org
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How this High compression ratio is made possible by 7Zip
By LZMA Technique 7Zip detects the duplicated files in the folder and compress only
the one original file.The rest duplicated files virtual hologram is only present. when we explore the archive we will find the files and when we extract the duplicated files are recreated from the original.This is the high compression Secret of 7Zip.