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. Download 7-zip installer. Now click to download 7Zip page and find your corresponding Windows system type. Click on which your system type belongs ( 32-bit or 64-bit ). The file is really small at around 1.5MB so the download should just take a couple of seconds. Run the installer. Now click on the 7Zip installer and follow the on-screen prompts. On that note, it is one of the factors that make 7Zip a powerful tool in its focused field. Whether it’s for Windows, Mac, or 7Zip for Linux OSes.And if you want your files to get the highest security from a simple archiving tool, you cannot go wrong with password protect on 7Zip. Aug 09, 2020 Latest version 7-Zip 21.00 alpha contains optimized code for CRC-32 calculation with ARM hardware instructions. You can see the speed of that code in lines CRC32:32 and CRC32:64 in benchmark log files.
Feb 21, 2019 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. We compared 7-Zip with WinRAR 5.20.
PeaZip is free file archiver utility, based on Open Source technologies of 7-Zip, p7zip, Brotli, FreeArc, PAQ, Zstandard, and PEA projects.
Cross-platform, full-featured but user-friendly alternative to WinRar, WinZip and similar general purpose archive manager applications, open and extract 200+ archive formats: 001, 7Z, ACE(*), ARC, ARJ, BR, BZ2, CAB, DMG, GZ, ISO, LHA, PAQ, PEA, RAR(**), TAR, UDF, WIM, XZ, ZIP, ZIPX, ZST - view full list of supported archive file formats for archiving and for extraction.
This software is released under Open Source LGPLv3 license, free for any use (private and professional), all PeaZip packages are secure downloads and do not contain advertising or harmful software.
Moreover portable packages, for Linux and Windows, does not need installation: simply extract and use the application.
7z is the new archive format, providing high compression ratio.
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
7z has open architecture, so it can support any new compression methods. Now the following methods are integrated to 7z:
| Method | Description |
|---|---|
| LZMA | Improved and optimized version of LZ77 algorithm |
| LZMA2 | Improved version of LZMA |
| PPMD | Dmitry Shkarin's PPMdH with small changes |
| BCJ | Converter for 32-bit x86 executables |
| BCJ2 | Converter for 32-bit x86 executables |
| BZip2 | Standard BWT algorithm |
| Deflate | Standard LZ77-based algorithm |
LZMA is default and general compression method of 7z format. The main features of LZMA method:
- High compression ratio
- Variable dictionary size (up to 4 GB)
- Compressing speed: about 1 MB/s on 2 GHz CPU
- Decompressing speed: about 10-20 MB/s on 2 GHz CPU
- Small memory requirements for decompressing (depend from dictionary size)
- Small code size for decompressing: about 5 KB
- Supporting multi-threading and P4's hyper-threading
LZMA compression algorithm is very suitable for embedded applications. LZMA is released under the terms of the GNU LGPL. LZMA is also available under a proprietary license for those who can not use the GNU LGPL in their code. If you want to use LZMA code, you can ask consultations, custom code programming and required developer licenses from page for support: Send message to LZMA developer. Check also information about LZMA SDK.
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7-Zip also supports encryption with AES-256 algorithm. This algorithm uses cipher key with length of 256 bits. To create that key 7-Zip uses derivation function based on SHA-256 hash algorithm. A key derivation function produces a derived key from text password defined by user. For increasing the cost of exhaustive search for passwords 7-Zip uses big number of iterations to produce cipher key from text password.
7z is a part of 7-Zip program distributed under the GNU LGPL. You can download 7-Zip sources and binaries from Download Page.
Applications that support 7z archives: WinRAR, PowerArchiver, TUGZip, IZArc.
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