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A free file archiver for extremely high compression

4.8 Stars (645)
793,236 Downloads (This Week)
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Editor's Review

7-Zip is a file archiver with a high compression ratio for ZIP and GZIP formats, which is between 2 to 10% better than its peers, depending on the exact data tested. And 7-Zip boosts its very own 7z archive format that also offers a significantly higher compression ratio than its peers—up to 40% higher! This is mainly because 7-Zip uses LZMA and LZMA2 compression, with strong compression settings and dictionary sizes, to slow but vastly improve density. If a zip tool gains its appeal from its ability to efficiently compress files, then 7-Zip proves it has a little bit o’ magic.

7-Zip at a Glance

After you effortlessly download and launch 7-Zip, you’ll quickly discover its simple and easy to navigate interface. The main toolbar contains 7-Zip’s most used features and there are several menus that allow you to dig deeper within. For example, the Extract button lets you easily browse for or accept the default destination directory for your file, while the View menu contains a Folder History, and the Favorites menu lets you save up to ten folders. 7-Zip also integrates with the Windows Explorer menus, displaying archive files as folders and providing a toolbar with drag-and-drop functions. You can also alternate between a single or dual-pane view.

Product Details

7-Zip offers several features that make it one of the best compression software options around. For example:

  • Open architecture—The source code uses the GNU LGPL license, while the unRAR code is under a mixed license with GNU LGPL + unRAR restrictions.
  • High compression ratio—Using its own 7z format with LZMA and LZMA2 compression, 7-Zip’s compression ratio is up to 40% higher than its peers. For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10% better than PKZip and WinZip.
  • Strong AES-256 encryption—This includes both password protection of files and encryption of file names.
  • Ability to use may compression, conversion, or encryption methods—For example 7-Zip:
    • Supports packing and unpacking for 7z, XZ, BZIP2, GZIP, TAR, ZIP, and WIM.
    • Supports unpacking only for ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR, and Z.
    • Supports a self-extracting capability for 7z format.
  • Integrates with Windows Shell—Using its menu options, you can integrate 7-Zip to the Windows Shell menu.
  • Powerful file manager and command line versions—There’s also a plugin for FAR Manager.
  • Localizations for 79 languages—This kind of support is why 7-Zip is the world’s favorite free compression software.



7-Zip is easy to download and use, it opens and compresses most everything, and is has a Windows shell extension. The interface is a little sparse and so are the instructions, but the program works like a charm anyway.

Quick Specs

  • Version: 9.22
  • File size: 1.1 MB
  • Date added: March 2, 2013
  • Operating systems: Windows
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7-Zip is a file archiver with a high compression ratio. You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. 7-Zip works for Windows 7, Vista, XP, 2008, 2003, 2000, NT, ME, and 98. And there is a port of the command line version to Linux/Unix. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license with GNU LGPL + unRAR restrictions. Check the license for details.

7-Zip Web Site

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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
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User Reviews

  • sheanhoxie
    1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Works very well, I've been using it for years without any complaints!

    Posted 10/30/2014
  • notatroll
    1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Great program. But can't you make a better UI? Looks very ugly. File manager is also so poor. Many people have requested you for so many years but you have done nothing. Please make a better UI like that of Windows file manager. A better UI will increase the users and you will get more support as well. So please make a better UI soon.

    Posted 10/19/2014
  • jordicraft21
    1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    good and easy but not is truth thah supercompress

    Posted 10/10/2014
  • fixeworks
    1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    The range of features and compression capability is out of question, also it is under 2 MB after installation so 7zip is just a MUST. However, developers here are just doing what they want without listening to features required by users (In my opinion that's the reason why other zip utilities are more popular), I imagine they spending nights for gaining 1% compression rate wihtou increasing usability (seriously, I can't imagine why no one forked 7zip to redesign it a bit). Issues: 1) Most websites (95%) provide only Md5 and Sha-1 checksums (because are cheaper I guess), those checksums are not secure as Sha-256, but if 7zip does not provide any checksums for those websites then the result is that user cannot do checksum wich is totally safeless (seein developers answering "install a Md5 utility" is a bit irritating). Also if the excuse for not adding MD5 and SHa-1 is that they are not secure, then just remove CRC too (wich is redundant since downloads from TCP connections already have CRC at TCP protocol level). 2) Allow copypasting to clipboard of checksums of file manager for make comparing easy 3) File manager is obsolete, use native folder browsing for each OS, it is much faster reliable and also make possible to users make use of their shortcuts and settings (this is also a question of accessibility, what if someone is using bigger fonts because visually impaired while 7 zip file manager still have small fonts? that force him to use the magnifier). 4) Allow decompression of tar.gz at once with 1 command. How difficult is wrap 2 sequential commands as 1?

    Posted 10/07/2014
  • jfd553
    1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Easy and effective app!

    Posted 10/06/2014
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Additional Project Details



Intended Audience

System Administrators, Developers, End Users/Desktop

User Interface

Win32 (MS Windows), Command-line

Programming Language

C++, C


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