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

We compared 7-Zip with WinRAR 5.20.

FILE SETS: Mozilla Firefox 34.0.5 for Windows and Google Earth 6.2.2.6613 for Windows.

Compression ratio results are very dependent upon the data used for the tests. Usually, 7-Zip compresses to 7z format 30-70% better than to zip format. And 7-Zip compresses to zip format 2-10% better than most of other zip compatible programs.

• High compression ratio in 7z format with LZMA and LZMA2 compression

• Supported formats:

• Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM

• Unpacking only: AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2, RAR, RPM, SquashFS, UDF, UEFI, VDI, VHD, VMDK, WIM, XAR and Z.

• For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip

• Strong AES-256 encryption in 7z and ZIP formats

• Self-extracting capability for 7z format

• Integration with Windows Shell

• Powerful File Manager

• Powerful command line version

• Plugin for FAR Manager

• Localizations for 87 languages