| .001 | Smith Micro Software | Sikkerhedskopifiler | Split Archive File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .002 | Various Developers | Sikkerhedskopifiler | Split Archive Part 2 File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .003 | Welltek Software | Sikkerhedskopifiler | Split Archive Part 3 File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .004 | SourceForge | Komprimerede filer | Compressed File From A Multi-volume Archive (part 4) | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .005 | bhv | Datafiler | Winfunktion Mathematik V8.0 Julia Fractal File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .006 | bhv | Datafiler | Winfunktion Mathematik V8.0 Julia Fractal File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .007 | bhv | Datafiler | Winfunktion Mathematik V8.0 Julia Fractal File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .008 | ESRI (Environmental Systems Research Institute) | GIS-filer | International S-57 Hydrographic Data Electronic Navigation Chart | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .009 | bhv | Datafiler | Winfunktion Mathematik V8.0 Julia Fractal File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .010 | bhv | Datafiler | Winfunktion Mathematik V8.0 Julia Fractal File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .2D | Archway Systems | CAD-filer | VersaCAD 2D Drawing File | Amapi 3D | Smith Micro Software |
| .A3D | AlternativaPlatform | 3D-billedfiler | Alternativa Player 3D Export File | Amapi 3D | Smith Micro Software |
| .ANIME | Smith Micro Software | Datafiler | Anime Studio Document | Smith Micro Moho Debut 12 | Smith Micro Software |
| .APK | Google | Komprimerede filer | Android Package File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .APPLE | Apple | Datafiler | Apple AppleSingle Data File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .ARC | Symantec Corporation | Sikkerhedskopifiler | Norton Backup Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .ARJ | Robert K. Jung | Komprimerede filer | ARJ Compressed File Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .B2A | Smith Micro Software | Kodet filer | Btoa Encoded File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .B64 | Smith Micro Software | Komprimerede filer | Base64 MIME-Encoded File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BHX | Open Source | Kodet filer | BinHex Encoded File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BIN | Unknown Developer | Disk billedfiler | Binary Disk Image File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BTOA | Smith Micro Software | Kodet filer | Binary-to-ASCII Encoded File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BZ | Smith Micro Software | Komprimerede filer | Bzip Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BZ2 | Julian Seward | Komprimerede filer | Bzip2 Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BZIP2 | Julian Seward | Komprimerede filer | Bzip2 Compressed Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CAB | Microsoft Corporation | Systemfiler | Windows Cabinet File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CB7 | Smith Micro Software | Komprimerede filer | Comic Book 7-Zip Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CBR | Unknown Developer | Komprimerede filer | Comic Book RAR Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CBT | Various Developers | Komprimerede filer | Comic Book TAR File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CBZ | Open Source | 3D-billedfiler | Comic Book Zip Archive File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CM2 | Smith Micro Software | 3D-billedfiler | Poser Camera Set File | Smith Micro Poser | Smith Micro Software |
| .CPT | Corel | Rasterbilledfiler | Corel Photo-Paint Image | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CR2 | Canon Inc. | Kamera Ubehandlede Filer | Canon Digital Camera Raw Image File | Poser | Smith Micro Software |
| .CRZ | Smith Micro Software | 3D-billedfiler | Compressed Poser Character Rigging File | Smith Micro Poser | Smith Micro Software |
| .CST | Smith Micro Software | Sideopsætningsfiler | Manga Studio Story File | Manga Studio | Smith Micro Software |
| .EFW | Corel | Komprimerede filer | Renamed Zip Or Executable File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .ENC | Smith Micro Software | Kodet filer | Encoded Data File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .FC2 | Smith Micro Software | 3D-billedfiler | Poser Face Pose File | Smith Micro Poser | Smith Micro Software |
| .FMC | Interscape | Datafiler | FormConnect Form File | MotionArtist | Smith Micro Software |
| .FMD | Smith Micro Software | Datafiler | MotionArtist Document File | MotionArtist | Smith Micro Software |
| .GTAR | Free Software Foundation | Datafiler | GNU Tar Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .GZ | GNU Project | Komprimerede filer | Gnu Zipped Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .HBX | Open Source | Kodet filer | BinHex Encoded File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .HD2 | Smith Micro Software | 3D-billedfiler | Poser Hand Pose File | Poser | Smith Micro Software |
| .HEX | Intel Corporation | Udviklerfiler | Hexadecimal Source File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .HFX | Smith Micro Software | Datafiler | HotFax Data File | HotFax | Smith Micro Software |
| .HR2 | Smith Micro Software | 3D-billedfiler | Poser Hair File | Smith Micro Poser | Smith Micro Software |
| .HRZ | Unknown Developer | Grafiske Filer | Slow Scan TeleVision File (SSTV) | Poser | Smith Micro Software |
| .LHA | WinAbility Software | Komprimerede filer | LHARC Compressed Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .LHARC | WinAbility Software | Komprimerede filer | LHARC Compressed Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .LT2 | Smith Micro Software | 3D-billedfiler | Poser Light Set File | Smith Micro Poser | Smith Micro Software |
| .LWO | NewTek | 3D-billedfiler | LightWave 3D Object File | Poser | Smith Micro Software |
| .LZH | Various Developers | Komprimerede filer | LZH Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .LZMA | Igor Pavlov | Komprimerede filer | LZMA Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .MAP | id Software | Spilfiler | Quake Engine Map File | Poser | Smith Micro Software |
| .MC5 | Smith Micro Software | 3D-billedfiler | Poser 5 Material File | Smith Micro Poser | Smith Micro Software |
| .MC6 | Smith Micro Software | Grafiske Filer | Poser 6 Material File | Poser | Smith Micro Software |
| .MCWORLD | Smith Micro Software | Spilfiler | Minecraft World Backup File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .MIM | Internet Engineering Task Force | Kodet filer | Multi-Purpose Internet Mail Message File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .MIME | Various Developers | Kodet filer | Multi-Purpose Internet Mail Extension | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .MME | Smith Micro Software | Kodet filer | Multipurpose Internet Mail Extensions | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .MOHO | Smith Micro Software | Datafiler | Moho Animation Project | Smith Micro Moho Debut 12 | Smith Micro Software |
| .MOR | Corel | Datafiler | Corel Shared Writing Tools Data | Poser | Smith Micro Software |
| .OBZ | Smith Micro Software | 3D-billedfiler | Compressed 3D Object File | Poser | Smith Micro Software |
| .PAK | Unknown Developer | Spilfiler | Video Game Package | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PET | Larry Short, Mick Amadio and Puppy community | Komprimerede filer | Puppy Linux Install Package | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PF | Smith Micro Software | Komprimerede filer | Private File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PIT | Samsung Electronics | Systemfiler | Samsung Phone Firmware File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PIZ | Winrar | Komprimerede filer | Zipped File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PMD | Adobe Systems Incorporated | Sideopsætningsfiler | PageMaker Document | Poser | Smith Micro Software |
| .PP2 | Pingman Tools | Datafiler | PingPlotter Data File | Smith Micro Poser | Smith Micro Software |
| .PPZ | Smith Micro Software | 3D-billedfiler | Compressed Poser Prop File | Smith Micro Poser | Smith Micro Software |
| .PZ2 | Smith Micro Software | 3D-billedfiler | Poser Pose File | Smith Micro Poser | Smith Micro Software |
| .PZ3 | Smith Micro Software | 3D-billedfiler | Poser Scene File | Poser | Smith Micro Software |
| .PZZ | Smith Micro Software | 3D-billedfiler | Poser Compressed Scene File | Poser | Smith Micro Software |
| .R00 | Rocky Sand Studio | Komprimerede filer | WinRAR Compressed Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R06 | Eugene Roshal | Komprimerede filer | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R07 | Eugene Roshal | Komprimerede filer | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R09 | Eugene Roshal | Komprimerede filer | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R30 | Eugene Roshal | Komprimerede filer | WinRAR Split Archive Part 30 | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R36 | Eugene Roshal | Komprimerede filer | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R50 | Eugene Roshal | Komprimerede filer | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .RAR | Rocky Sand Studio | Komprimerede filer | WinRAR Compressed Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .RSR | Smith Micro Software | Rasterbilledfiler | Poser Model Preview File | Smith Micro Poser | Smith Micro Software |
| .S07 | Eugene Roshal | Komprimerede filer | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .S09 | Eugene Roshal | Komprimerede filer | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .S7Z | Igor Pavlov | Komprimerede filer | 7-Zip Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .SEA | Smith Micro Software | Komprimerede filer | Self-Extracting Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .SIT | Smith Micro Software | Komprimerede filer | StuffIt Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .SITX | Smith Micro Software | Komprimerede filer | StuffIt X Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .SMV | Smith Micro Software | Videofiler | VideoLink Mail Video File | Smith Micro Videolink Pro | Smith Micro Software |
| .SOW | Interplay Entertainment | Spilfiler | Descent ARJ Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TAR | Jean-loup Gailly and Mark Adler | Datafiler | Consolidated Unix File Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TAZ | Smith Micro Software | Komprimerede filer | Tar Zipped File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TBZ2 | Winrar | Komprimerede filer | Tar BZip 2 Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TG | Julian Gabriel Casadesus and Others | Lydfiler | TuxGuitar Document | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TGZ | Various Developers | Komprimerede filer | Gzipped Tar File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TIG | Texas Instruments, Inc. | Sikkerhedskopifiler | TI Connect Backup File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TZ | Smith Micro Software | Komprimerede filer | Compressed Tar Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .U3D | 3D Industry Forum | 3D-billedfiler | Universal 3D File | Smith Micro Poser | Smith Micro Software |
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