7-Zip is a file archiver with a high compression ratio.
Sometimes you need to transfer a bunch of files to colleagues or friends via email or other file transfer tools, you may utilize a file compression tool like the most popular 7-Zip, WinRAR or WinZip to compress all files into a single archive file and get a reduced file size for easy transfer. CAM UnZip is a free compressor and file extractor that works with ZIP files. It supports drag and drop to quickly open a ZIP file and can create password-protected archives. There's an interesting feature in CAM UnZip where the program can be configured to automatically run a 'setup.exe' file if one is extracted from a ZIP archive. Express Zip File Compression Software. An archiving and compression tool to easily create, edit, manage and extract zipped files and folders. Compress files to reduce size for email transmission or archive data using less disk space when backing up information.
Download 7-Zip 19.00 (2019-02-21) for Windows:
| Link | Type | Windows | Size |
|---|---|---|---|
| Download | .exe | 32-bit x86 | 1.2 MB |
| Download | .exe | 64-bit x64 | 1.4 MB |
Hi @yangyng03 it all depends on the extension the files has. If it's a.zip,.rar or.7z file, you need to unzip it. Windows can only unzip zip files. For rar and 7z you'll need an extra program like winRar or 7zip.
Download 7-Zip 21.01 alpha (2021-03-09) for Windows:
| Link | Type | Windows | Size |
|---|---|---|---|
| Download | .exe | 32-bit x86 | 1.2 MB |
| Download | .exe | 64-bit x64 | 1.4 MB |
| Download | .exe | 64-bit ARM64 | 1.5 MB |
License
7-Zip is free software with open source. The most of the code is under the GNU LGPL license. Some parts of the code are under the BSD 3-clause License. Also there is unRAR license restriction for some parts of the code. Read 7-Zip License information.
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.
The main features of 7-Zip
- 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
7-Zip works in Windows 10 / 8 / 7 / Vista / XP / 2019 / 2016 / 2012 / 2008 / 2003 / 2000.
p7zip - the port of the command line version of 7-Zip to Linux/Posix.
On 7-Zip's SourceForge Page you can find a forum, bug reports, and feature request systems.
Compression ratio
Unzip 7zip On Mac
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.
| Archiver | Mozilla Firefox | Google Earth | ||
|---|---|---|---|---|
| 65 files 85 280 391 bytes | 483 files 110 700 519 bytes | |||
| Compressed size | Ratio | Compressed size | Ratio | |
| 7-Zip 9.35 -mx | 39 357 375 | 100% | 15 964 369 | 100% |
| WinRAR 5.20 -m5 -s -ma5 -md128m | 41 789 543 | 106% | 17 035 432 | 107% |
Unzip 7z Mac Online
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.