| .002 | Various Developers | Backup Files | Split Archive Part 2 File | The Unarchiver | Dag Agren, Circlesoft |
| .004 | SourceForge | Compressed Files | Compressed File From A Multi-volume Archive (part 4) | The Unarchiver | Dag Agren, Circlesoft |
| .005 | bhv | Data Files | Winfunktion Mathematik V8.0 Julia Fractal File | The Unarchiver | Dag Agren, Circlesoft |
| .007 | bhv | Data Files | Winfunktion Mathematik V8.0 Julia Fractal File | The Unarchiver | Dag Agren, Circlesoft |
| .008 | ESRI (Environmental Systems Research Institute) | GIS Files | International S-57 Hydrographic Data Electronic Navigation Chart | The Unarchiver | Dag Agren, Circlesoft |
| .009 | bhv | Data Files | Winfunktion Mathematik V8.0 Julia Fractal File | The Unarchiver | Dag Agren, Circlesoft |
| .010 | bhv | Data Files | Winfunktion Mathematik V8.0 Julia Fractal File | The Unarchiver | Dag Agren, Circlesoft |
| .ACE | e-merge GmbH | Compressed Files | WinAce Compressed File | The Unarchiver | Dag Agren, Circlesoft |
| .ADZ | GNU Project | Disk Image Files | Compressed Amiga Disk File | The Unarchiver | Dag Agren, Circlesoft |
| .ALZ | ESTsoft | Compressed Files | ALZip Archive | The Unarchiver | Dag Agren, Circlesoft |
| .ARC | Symantec Corporation | Backup Files | Norton Backup Archive | The Unarchiver | Dag Agren, Circlesoft |
| .ARJ | Robert K. Jung | Compressed Files | ARJ Compressed File Archive | The Unarchiver | Dag Agren, Circlesoft |
| .BIN | Unknown Developer | Disk Image Files | Binary Disk Image File | The Unarchiver | Dag Agren, Circlesoft |
| .BZ | Smith Micro Software | Compressed Files | Bzip Compressed File | The Unarchiver | Dag Agren, Circlesoft |
| .BZ2 | Julian Seward | Compressed Files | Bzip2 Compressed File | The Unarchiver | Dag Agren, Circlesoft |
| .BZIP2 | Julian Seward | Compressed Files | Bzip2 Compressed Archive | The Unarchiver | Dag Agren, Circlesoft |
| .CAB | Microsoft Corporation | System Files | Windows Cabinet File | The Unarchiver | Dag Agren, Circlesoft |
| .CBR | Unknown Developer | Compressed Files | Comic Book RAR Archive | The Unarchiver | Dag Agren, Circlesoft |
| .CPGZ | Open Source | Compressed Files | Compressed UNIX CPIO Archive | The Unarchiver | Dag Agren, Circlesoft |
| .CPIO | Power Software Ltd | Encoded Files | Unix CPIO Archive | The Unarchiver | Dag Agren, Circlesoft |
| .CPT | Corel | Raster Image Files | Corel Photo-Paint Image | The Unarchiver | Dag Agren, Circlesoft |
| .DCS | Quark Software Inc. | Vector Image Files | Desktop Color Separation File | The Unarchiver | Dag Agren, Circlesoft |
| .DD | Sage | Data Files | Sage MAS 90 Data File | The Unarchiver | Dag Agren, Circlesoft |
| .EGG | ESTsoft | Compressed Files | ALZip Archive | The Unarchiver | Dag Agren, Circlesoft |
| .LBR | Dag Agren, Circlesoft | Compressed Files | LU Library Archive | The Unarchiver | Dag Agren, Circlesoft |
| .LHA | WinAbility Software | Compressed Files | LHARC Compressed Archive | The Unarchiver | Dag Agren, Circlesoft |
| .LHARC | WinAbility Software | Compressed Files | LHARC Compressed Archive | The Unarchiver | Dag Agren, Circlesoft |
| .LZMA | Igor Pavlov | Compressed Files | LZMA Compressed File | The Unarchiver | Dag Agren, Circlesoft |
| .LZX | Open Source | Compressed Files | Amiga LZX Compressed File | The Unarchiver | Dag Agren, Circlesoft |
| .PAK | Unknown Developer | Game Files | Video Game Package | The Unarchiver | Dag Agren, Circlesoft |
| .PAX | Portable Operating System Interface (POSIX) Consortium | Compressed Files | PAX Archive | The Unarchiver | Dag Agren, Circlesoft |
| .PIT | Samsung Electronics | System Files | Samsung Phone Firmware File | The Unarchiver | Dag Agren, Circlesoft |
| .PIZ | Winrar | Compressed Files | Zipped File | The Unarchiver | Dag Agren, Circlesoft |
| .R00 | Rocky Sand Studio | Compressed Files | WinRAR Compressed Archive | The Unarchiver | Dag Agren, Circlesoft |
| .RAR | Rocky Sand Studio | Compressed Files | WinRAR Compressed Archive | The Unarchiver | Dag Agren, Circlesoft |
| .S7Z | Igor Pavlov | Compressed Files | 7-Zip Compressed File | The Unarchiver | Dag Agren, Circlesoft |
| .SAR | Commodore International | Raster Image Files | Saracen Paint Image | The Unarchiver | Dag Agren, Circlesoft |
| .SIT | Smith Micro Software | Compressed Files | StuffIt Archive | The Unarchiver | Dag Agren, Circlesoft |
| .SITX | Smith Micro Software | Compressed Files | StuffIt X Archive | The Unarchiver | Dag Agren, Circlesoft |
| .TAR | Jean-loup Gailly and Mark Adler | Data Files | Consolidated Unix File Archive | The Unarchiver | Dag Agren, Circlesoft |
| .TAZ | Smith Micro Software | Compressed Files | Tar Zipped File | The Unarchiver | Dag Agren, Circlesoft |
| .TXZ | Open Source | Compressed Files | XZ Compressed Tar Archive | The Unarchiver | Dag Agren, Circlesoft |
| .U3P | SanDisk Corporation | Executable Files | U3 Platform Install Data File | The Unarchiver | Dag Agren, Circlesoft |
| .WIDGET | Microsoft Corporation | Executable Files | Microsoft Windows Mobile Widget | The Unarchiver | Dag Agren, Circlesoft |
| .XZ | Various Developers | Compressed Files | XZ Compressed Archive | The Unarchiver | Dag Agren, Circlesoft |
| .Z | Smith Micro Software | Compressed Files | Unix Compressed File | The Unarchiver | Dag Agren, Circlesoft |
| .Z01 | Corel | Compressed Files | WinZip First Split Zip File | The Unarchiver | Dag Agren, Circlesoft |
| .Z02 | Corel | Compressed Files | WinZip Second Split Zip File | The Unarchiver | Dag Agren, Circlesoft |
| .Z03 | Corel | Compressed Files | WinZip Third Split Zip File | The Unarchiver | Dag Agren, Circlesoft |
| .Z04 | Corel | Compressed Files | WinZip Fourth Split Zip File | The Unarchiver | Dag Agren, Circlesoft |
| .Z05 | Corel | Compressed Files | WinZip Fifth Split Zip File | The Unarchiver | Dag Agren, Circlesoft |
| .Z06 | Corel | Compressed Files | WinZip Sixth Split Zip File | The Unarchiver | Dag Agren, Circlesoft |
| .ZIP | Winrar | Compressed Files | Zipped File | The Unarchiver | Dag Agren, Circlesoft |
| .ZIP2 | Smith Micro Software | Compressed Files | StuffIt Archive | The Unarchiver | Dag Agren, Circlesoft |
| .ZIPX | Corel | Compressed Files | Extended Zip File | The Unarchiver | Dag Agren, Circlesoft |
| .ZOM | Check Point Software Technologies Ltd. | Data Files | ZoneAlarm Mailsafe Renamed Data | The Unarchiver | Dag Agren, Circlesoft |
| .ZPI | Winrar | Compressed Files | Zipped File | The Unarchiver | Dag Agren, Circlesoft |
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