Supported formats

Format Support level Notes
Zip Full Full support for the normal zip format, with additional support for AES encryption, Zip64 extensions for large files, Mac OS extensions of many different kinds, and several unusual compression methods. Can also extract .EXE self-extracting files using Zip.
Zipx Full Full support for the new compression modes introduced by WinZip.
RAR Full Including encryption and multiple volumes. Can also extract .EXE self-extracting files using RAR.
7z Full All common compression methods are supported. Also supports Unix extensions.
Tar Full  
Gzip Full  
Bzip2 Full  
LZMA, XZ Full Both the old "LZMA-alone" format, usually named .lzma, and the new .xz format.
CAB Full  
MSI Full This format is also used by many other Microsoft formats, meanings that you can use The Unarchiver to extract internal data from DOC and PPT files, and others. There is probably no reason to do this, but you can.
NSIS Extensive Supports many different versions, starting from version 1.1o
EXE Some Many kinds of .exe self-extracting formats are supported. However, if you find one that is not, please post an issue on the bug tracker.
ISO, BIN, MDF, NRG, CDI Extensive Most common disc images can be unpacked, both normal and raw.
Split files Basic Can join files named .001, .002 that do not use any extra wrapper format.

Supported old formats

Format Support level Was popular on Notes
StuffIt No encryption Mac OS Can unpack all files I've been able to locate.
StuffIt X Partial Mac OS Can unpack many files, some more obscure features are still unsupported. JPEG compression is also unsupported.
DiskDoubler Almost full Mac OS Only lacks some old compression methods, because I have not been able to locate any files using these. If you have some that do not work, please post them here.
Compact Pro No encryption Mac OS  
PackIt Full Mac OS  
Cpio Full Unix  
Compress (.Z) Full Unix  
ARJ No multi-part DOS   
ARC, PAK Full DOS Full support for all algorithms, including proprietary ones from PAK. Encryption only works in command-line utilities.
Ace Only old files DOS No support for Ace 2.0 and up (WinAce).
Zoo Full DOS  
LZH Full DOS, Amiga (as LhA)  
ADF FFS Amiga (emulated) Can extract files from Amiga disk images using the regular FFS file system.
DMS FFS Amiga Can extract files from compressed Amiga disk images using the regular FFS file system.
LZX Full Amiga  
PowerPacker Full Amiga  
LBR Full CP/M, DOS  
Squeeze Full CP/M, DOS  
Crunch Full CP/M  
...     Many other old formats, especially Amiga-specific ones, are also supported through libxad, but I have not made a full survey of which ones.

Supported unusual formats

Format Support level Notes
XAR Full Suggested replacement for Tar on Unix. Used in some newer .pkg files on Mac OS X.
RPM Full Linux package format.
Deb Full Linux package format.
Ar Full Unix library format.
ALZip No encryption Archive format which is mainly popular in South Korea. Support for all known compression methods, including Bzip2, Deflate and obfuscated Deflate.
WARC Full Internet Archive Web Archive. Request and response headers also included in metadata.
NSA, SAR Partial Game data file. Can unpack all files I've found. If you have ones that do not unpack, please post an issue.
NDS Full Nintendo DS ROM image, which can contain a file system.
SWF Images and audio Extracts images, sounds and music from Flash files.
PDF Bitmap images Extracts bitmap images from PDF files. Especially useful for scanned PDFs.


These are not actually all the formats supported by The Unarchiver. The libxad library which is part of The Unarchiver supports even more old formats, especially Amiga-specific ones.

If you have a compressed file that The Unarchiver does not open, please post a bug on the bug tracker, and include the file in question, and I will look into whether it is possible to add support for it!