 | |
| Original author(s) | Dag Ågren |
|---|---|
| Developer(s) | Circlesoft, MacPaw[1] |
| Stable release | 4.3.8[2]  / 16 May 2024 |
| Repository | |
| Operating system | macOS,Linux usingGNUstep libraries, and command line only onMicrosoft Windows,Linux,macOS |
| Available in | 18 languages |
List of languages English, Arabic, Bulgarian, Czech, Dutch, French, German, Hungarian, Italian, Japanese, Latvian, Norwegian Bokmål, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Turkish | |
| Type | File Extractor / Decompressor |
| License | Proprietary since acquisition[3] FormerlyLGPLv2.1-or-later |
| Website | theunarchiver |
The Unarchiver is anadware[3]data decompression utility, which supports more formats thanArchive Utility[4] (formerly known as BOMArchiveHelper), the built-in archive unpacker program inmacOS. It can also handle filenames in variouscharacter encodings, created usingoperating system versions that use those character encodings.[5] The latest version requires Mac OS X Lion or higher. The Unarchiver does not compress files.[6]
Prior to the purchase by MacPaw in 2017,[7] The Unarchiver wasfree software licensed under theLGPL, up to version 3.11.1 (released 2016).[8] This version, and the versions prior to the buyout, are still available for download from Dag Ågren’s original website.[9] The Unarchiver version 3.11.1 provided a free-software implementation of extraction of RAR versions up to RAR5.[10][11]
The corresponding command line utilitiesunar andlsar arefree software licensed under theLGPL[12][13] run onMicrosoft Windows,Linux, and macOS.[14]
A main feature of the Unarchiver is its ability to handle many old or obscure formats likeStuffIt as well asAmigaOS disk images and LZH / LZX archives, and so on. This is credited in its source code to the use oflibxad, an Amiga file format library. Ågren also worked to reverse engineer the StuffIt and StuffIt X formats, and his code was one of the most complete open source implementations of these proprietary formats.
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