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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.
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It is not a free software license. 7-Zip, a free and open-source program, starting from 7-Zip version 15.06 beta [11] can unpack RAR5 archives, using the RARLAB unrar code. PeaZip is a free RAR unarchiver, licensed under the LGPLv3-or-later and via 7-Zip can unpack RAR archives, using RARLAB unrar. [12]
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.
Eugene Roshal (Russian: Евгений Лазаревич Рошал, romanized: Yevgeniy Lazarevich Roshal; born 1972) is a Russian software engineer best known for developing the RAR file format, the WinRAR archiver, and the FAR file manager. His contributions have significantly impacted the field of data compression and file management.
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[citation needed] WinRAR is a notable example of an unlimited trialware, i.e. a program that retains its full functionality even after the trial period has ended. The rationale behind trialware is to give potential users the opportunity to try out the program to judge its usefulness before purchasing a license.
A "free" trial is another related concept in which customers are allowed to use a product, free of charge, for a limited time. [ 29 ] When a software monopoly has a strong network effect, it may be more profitable for it to offer a "free" trial. [ 30 ]