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. Check license information here: 7-Zip license.
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. But you can make a donation to support further development of 7-Zip.
The main features of 7z format:
- Open architecture
- High compression ratio
- Strong AES-256 encryption
- Ability of using any compression, conversion or encryption method
- Supporting files with sizes up to 16000000000 GB
- Unicode file names
- Solid compressing
- Archive headers compressing
Homepage:http://www.7-zip.org/
Download 7-Zip 4.65 (2009-02-03) for Windows:
| Link | Type | Windows | Size |
|---|---|---|---|
| Download | .exe | 32-bit | 1 MB |
| Download | .msi | x64 | 1 MB |
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