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7-Zip 64-bit

7-Zip is the most popular open-source file extractor or file archiver software. It works on Windows operating systems, as well as Linux via command line. It supports encryption and is completely free software which you can download, install and use.

Supported formats for extract:

001 (002, etc.), 7Z, ARJ, BZ2, BZIP2, CAB, CHM, CHW, CPIO, CRAMFS, DEB, DMG, DOC, EXE, FAT, GZ, GZIP, HFS, HXS, ISO, LHA, LZH, LZMA, MBR, MSI, NTFS, PPT, QCOW2, RAR, RPM, SQUASHFS, SWM, TAR, TAZ, TBZ, TBZ2, TGZ, VDI, VDMK, VHD, WIM, XAR, XLS, XZ, Z01 (Z02, etc.), Z, ZIP, and ZIPX

7-Zip is able to compress files as:

7Z, BZIP2, GZIP, TAR, WIM, XZ, and ZIP

I believe that 7-Zip is one of the easiest programs to use thanks to the simple user interface. It is extremely easy to create or extract archives with 7-Zip. Additionally, the program is fully integrated into Windows so you can extract or archive files by right-clicking the file/s.

7Z Format comparison

For the purpose of this comparison, I’ve been used the following files and folders:

  • Word Documents: 60 (Total: 51,9 MB Uncompressed);
  • PDF Documents: 15 (Total: 70,2 MB Uncompressed);
  • JPG Images: 40 (Total: 72,2 MB Uncompressed);

In total, there are 115 files in 3 different folders, which totals 194 MB in space.

After the 7Z compression on Ultra settings, the size of the archive was 31% smaller (134 MB).

For the comparison, the same files on WinRAR’s Best quality settings, the archive was only 6% smaller.

7-Zip Ratings
  • 8/10
    User Interface - 8/10
  • 10/10
    Functionality - 10/10
  • 9/10
    Speed - 9/10
9/10

Summary

7-Zip is open source software. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license: GNU LGPL + unRAR restrictions.