7-Zip is a file archiver with a high compression ratio.
Download 7-Zip 19.00 (2019-02-21) for Windows:
PowerArchiver 2021 Portable Version 20.00 build 73 Portable version of PowerArchiver 2021 (32-bit/64-bit). 2/5/2021: 32,548 KB: Download: PowerArchiver Command Line 7. B1 Archiver works on all platforms - Windows, Linux, Mac and Android. You no longer need different software on your PC, smartphone or tablet. B1 is the best unified solution for every device.
Link | Type | Windows | Size |
---|---|---|---|
Download | .exe | 32-bit x86 | 1.2 MB |
Download | .exe | 64-bit x64 | 1.4 MB |
Logsheet gais. GFI Archiver is an award winning Email Archiving Solution for Exchange, Office 365 and other servers that reduces reliance on PST files with secure email storage and email compliance. The archiver, also known simply as ar, is a Unix utility that maintains groups of files as a single archive file.Today, ar is generally used only to create and update static library files that the link editor or linker uses and for generating.deb packages for the Debian family; it can be used to create archives for any purpose, but has been largely replaced by tar for purposes other than. Archiver synonyms, Archiver pronunciation, Archiver translation, English dictionary definition of Archiver. Often archives A place or collection containing records, documents, or other materials of historical interest: old land deeds in the municipal.
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
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% |
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.
A file archiver is a computer program that combines a number of files together into one archive file, or a series of archive files, for easier transportation or storage. File archivers may employ lossless data compression in their archive formats to reduce the size of the archive.
Basic archivers just take a list of files and concatenate their contents sequentially into archives. The archive files need to store metadata, at least the names and lengths of the original files, if proper reconstruction is possible. More advanced archivers store additional metadata, such as the original timestamps, file attributes or access control lists.
The process of making an archive file is called archiving or packing. Reconstructing the original files from the archive is termed unarchiving, unpacking or extracting.
History[edit]
An early archiver was the Multics command archive, descended from the CTSS command of the same name, which was a basic archiver and performed no compression. Multics also had a 'tape_archiver' command, abbreviated ta, which was perhaps the forerunner of unix' tar.[1]
Unix archivers[edit]
The Unix tools ar, tar, cpio act as archivers but not compressors. Users of the Unix tools use additional compression tools, such as gzip, bzip2, or xz, to compress the archive file after packing or remove compression before unpacking the archive file. The filename extensions are successively added at each step of this process. For example, archiving a collection of files with tar and then compressing the resulting archive file with gzip results a file with
.tar.gz
extension.This approach has two goals:
- It follows the Unix philosophy that each program should accomplish a single task to perfection, as opposed to attempting to accomplish everything with one tool. As compression technology progresses, users may use different compression programs without having to modify or abandon their archiver.
- The archives use solid compression. When the files are combined, the compressor can exploit redundancy across several archived files and achieve better compression than a compressor that compresses each files individually.
This approach, however, has disadvantages too:
- Extracting or modifying one file is difficult. Extracting one file requires decompressing an entire archive, which can be time- and space-consuming. Modifying one means the file needs to be put back into archive and the archive recompressed again. This operation requires additional time and disk space.
- The archive becomes damage-prone. If the area holding shared data for several files is damaged, all those files are lost.
- It's impossible to take advantage of redundancy between files unless the compression window is larger than the size of an individual file. For example, gzip uses DEFLATE, which typically operates with a 32768 byte window, whereas bzip2 uses a Burrows-Wheeler transform roughly 27 times bigger. xz defaults to 8 MiB but supports significantly larger windows.
Archivero En Ingles
Windows archivers[edit]
The built-in archiver of Microsoft Windows as well as third-party archiving software, such as WinRAR and 7-zip, often use a graphical user interface. They also offer an optional command-line interface, while Windows itself does not. Windows archivers perform both archiving and compression. Solid compression may or may not be offered, depending on the product: Windows itself does not support it; WinRAR and 7-zip offer it as an option that can be turned on or off.
See also[edit]
References[edit]
Archiver.rootsweb.ancestry.com
- ^Van Vleck, Tom. 'Multics Glossary - A'. multicians.org. Retrieved Jan 6, 2016.
External links[edit]
Www.archiversonline.com
- Archive formats at Curlie and get a mop]]
Www.archivers.com
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