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WinRAR is a trialware file archiver utility, developed by Eugene Roshal of win.rar GmbH. It can create and view archives in RAR or ZIP file formats, [ 6 ] and unpack numerous archive file formats. To enable the user to test the integrity of archives, WinRAR embeds CRC32 or BLAKE2 checksums for each file in each archive.
The operating systems the archivers can run on without emulation or compatibility layer. Ubuntu's own GUI Archive manager, for example, can open and create many archive formats (including Rar archives) even to the extent of splitting into parts and encryption and ability to be read by the native program.
The software has received awards, In 2007, SourceForge granted it community choice awards for "Technical Design" and for "Best Project". [42] In 2013, Tom's Hardware conducted a compression speed test comparing 7-ZIP, MagicRAR, WinRAR , WinZip; they concluded that 7-ZIP beat out all the others with regards to compression speed, ratio, and size ...
B1 Free Archiver supports opening most popular archive formats (such as B1, ZIP, RAR, 7z, GZIP, TAR.GZ, TAR.BZ2 and ISO) but can create only .b1 and .zip archives. [6] The utility can also create split archives which consist of several parts each of specified size [7] and password-protected archives, encrypted with 256 bit AES algorithm. [8]
A ZIP64 local file extra field record, for example, has the signature 0x0001 and a length of 16 bytes (or more) so that two 64-bit values (the uncompressed and compressed sizes) may follow. Another common local file extension is 0x5455 (or "UT") which contains 32-bit UTC UNIX timestamps. This is immediately followed by the compressed data.
UNRARLIB (UniquE RAR File Library) [19] was an obsolete free software unarchiving library called "unrarlib", licensed under the GPLv2-or-later. It could only decompress archives created by RAR versions prior to 2.9; archives created by RAR 2.9 and later use different formats not supported by this library.
WinZip 1.0 was released in April 1991 as a graphical user interface (GUI) front-end for PKZIP. [5]Former WinZip icon. From version 6.0 until version 9.0, registered users could download the newest versions of the software, enter their original registration information or install over the top of their existing registered version, and thereby obtain a free upgrade.
PeaZip supports encryption [21] with AES 256-bit cipher in 7z and ZIP archive formats. In PeaZip's native PEA format, and in FreeArc's ARC format, supported ciphers are AES 256-bit, Blowfish, [22] Twofish [23] 256 and Serpent 256 (in PEA format, all ciphers are used in EAX authenticated encryption mode).