| File extension | The full name of the file |
|---|---|
| File extension I | Borland C++ Intermediate Preprocessor Output Format |
| File extension I00 | Split MDS Disk Image Format |
| File extension I01 | Split Disk Image Format |
| File extension I02 | Split Disk Image Format |
| File extension I03 | Split Disk Image |
| File extension I04 | Split Disk Image |
| File extension I05 | Split Disk Image |
| File extension I17 | Pixel PowerCollage Image |
| File extension I18 | Pixel Power Collage Image Format |
| File extension I1C | IBM Voice Type Languages Newuser |
| File extension I1I | IBM Voice Type Languages Newuser |
| File extension I2C | IBM Voice Type Languages Newuser |
| File extension I2D | Wyse Device Management Thin Client Disk Image |
| File extension I2G | Intergeo I2G Geometric |
| File extension I2I | IBM Voice Type Languages Newuser |
| File extension I32 | NI LabView |
| File extension I3A | Point Blank Game |
| File extension I3ANIMPACK | Point Blank Game |
| File extension I3C | IBM Voice Type Languages Newuser |
| File extension I3CHR | Point Blank Game |
| File extension I3D | Houdini Image 3D Format |
| File extension I3EXEC | Point Blank |
| File extension I3I | IBM Voice Type Languages Newuser |
| File extension I3PACK | Point Blank Game Data Format |
| File extension I3S | Point Blank Game |
| File extension I5D | IUCLID XML Backup |
| File extension I5S | IUCLID Compressed Backup |
| File extension I5Z | IUCLID Import Or Export Format |
| File extension I64 | Interactive Disassembler |
| File extension IA1 | Infinite Algebra 1 |
| File extension IA2 | Infinite Algebra Assignment |
| File extension IA64 | HP-UX |
| File extension IAA | INTUS Audio Format |
| File extension IAD | Symantec Patch Management |
| File extension IAF | Microsoft Outlook Exported Account And Email Setting Format |
| File extension IAI | Nova Logic Item Attributes Info |
| File extension IAK | MAIL.DAT Information Access Key |
| File extension IAL | Microsoft SharePoint List Activity |
| File extension IAM | Autodesk Inventor Assembly Format |
| File extension IAO | ImperiumAO Data |
| File extension IAR | CD Katalog |
| File extension IAS | BitDefender Format |
| File extension IB | InterBase Database Format |
| File extension IB2 | IncrediBots World Map Format |
| File extension IB3 | IncrediBots World Map Format |
| File extension IB7 | Pixel Power Collage Image Format |
| File extension IBA | IBooks Author E-book Format |
| File extension IBAK | Password Safe Backup |
| File extension IBANK | IBank Accounting Data |
| File extension IBATEMPLATE | IBooks Author Template Format |
| File extension IBB | LIGHTNING UK! ImgBurn Project Format |
| File extension IBCD | InstantBingoCard Document Format |
| File extension IBD | MySQL InnoDB Database Table |
| File extension IBE | IBECrypto Encrypted |
| File extension IBF | Final Fantasy XI Game |
| File extension IBG | IBridge Project Workspace |
| File extension IBI | Raven Software ICARUS Compiled Script |
| File extension IBK | Sound Blaster FM Instrument Bank |
| File extension IBL | IBasic Component Language |
| File extension IBM | Commodore Amiga Graphics |
| File extension IBN | WinIQSIM |
| File extension IBOOKS | IBooks E-book Format |
| File extension IBP | IsoBuster Managed Image Information Format |
| File extension IBPLUGIN | Interface Builder Extension |
| File extension IBQ | IsoBuster Managed Image Format |
| File extension IBRO | IncrediBots Robot Format |
| File extension IBS | I2 IBase |
| File extension IBT | Thief Deadly Shadows Texture And Model Format |
| File extension IBV | IGOR Pro Binary Variable |
| File extension IBW | IGOR Pro Binary Wave |
| File extension IBX | Interscope BlackBox |
| File extension IBY | Symbian ROM Image Component Include |
| File extension IBZ | MySQL InnoDB Database Table Compressed Backup |
| File extension IC | ASwin Project |
| File extension IC0 | HSPICE Output |
| File extension IC1 | Atari Bitmap Image Format |
| File extension IC2 | Atari Bitmap Image Format |
| File extension IC3 | Atari Bitmap Image Format |
| File extension IC3D | IC3D Scene Format |
| File extension IC4 | SADiE Interchange Data |
| File extension IC5 | Interactive Image Creator Image Project |
| File extension IC8 | Neo Geo BIOS |
| File extension ICA | Citrix Independent Computer Architecture Format |
| File extension ICAL | ICalendar Calendar File Format (Microsoft Outlook, Apple ICal) |
| File extension ICALENDAR | ICalendar Calendar File Format (Microsoft Outlook, Apple ICal) |
| File extension ICALEVENT | Apple ICal Document Format |
| File extension ICALTODO | Apple ICal Document Format |
| File extension ICAP | Adobe InDesign Format |
| File extension ICB | Truevision Targa Format |
| File extension ICBU | Apple ICal Calendars Backup Format |
| File extension ICC | International Color Consortium Profile File Format |
| File extension ICD | Microsoft Windows OpenGL Installable Client Driver Format |
| File extension ICE | IceChat IRC Client Script Format |
| File extension ICF | Zoom Router Configuration Format |
| File extension ICG | Image Comparer Result |
| File extension ICHAT | Apple IChat Saved History Format |
| File extension ICHATTRANSFER | Apple IChat Transfer |
| File extension ICI | Ampac |
| File extension ICL | Icon Library Format |
| File extension ICM | Windows Image Color Matching Format |
| File extension ICMA | Adobe InDesign Format |
| File extension ICML | Adobe InDesign Format |
| File extension ICMS | RagTime Extensions |
| File extension ICN | Icon Format |
| File extension ICNS | Apple Icon Graphic Format |
| File extension ICO | Icon Format |
| File extension ICOA | IBM Image Object Content Architecture (IOCA) Bitmap Graphics |
| File extension ICON | Icon Image Format |
| File extension ICONBOX | IconBox |
| File extension ICONBOXICON | IconBox |
| File extension ICONPACKAGE | IconPackager Theme Format |
| File extension ICONTAINER | Icon Container Library Format |
| File extension ICP | Unix IContact Parameter |
| File extension ICPR | IconUtils Project Format |
| File extension ICQ | ICQ Archive |
| File extension ICR | Image Comparer Result |
| File extension ICS | ICalendar Calendar File Format (Microsoft Outlook, Apple ICal) |
| File extension ICST | Adobe InCopy Document Preset |
| File extension ICTE | Apple Mac Internet Configuration |
| File extension ICURSORFX | ICursor Effect Format |
| File extension ICW | Microsoft Internet Explorer Internet Connection Wizard |
| File extension ICX | Remote Call Profiler Summary View |
| File extension ICXS | ITunes |
| File extension ICZ | Lib2Def Output |
| File extension ID | IBM Lotus Notes ID Format |
| File extension ID2 | Microsoft Live Messenger Avatar Format |
| File extension ID3 | IData 3 Data |
| File extension ID31 | Helium Music Manager Id3 Tags Export |
| File extension ID32 | Helium Music Manager Id3 Tags Export |
| File extension IDA | Microsoft IIS Server |
| File extension IDAP | Adobe InDesign Format |
| File extension IDATA | IData 2 Data |
| File extension IDB | Microsoft Visual Studio Developer Intermediate Debug Format |
| File extension IDB2 | InfoStat Database |
| File extension IDC | Internet Database Connector Document Format |
| File extension IDD | Adobe InDesign For Mac Document |
| File extension IDE | Borland C++ Project Format |
| File extension IDEA | Adobe Ideas Vector Drawing Format |
| File extension IDEMO | InstantDemo Project |
| File extension IDENTCACHE | Delphi Temporary Cache |
| File extension IDENTIFIER | Microsoft Windows Zone Identifier |
| File extension IDF | Microsoft Windows 95 MIDI Instrument Definition Format |
| File extension IDG | Majax Settings |
| File extension IDH | OpenCBM |
| File extension IDI | I-DEAS Web Access |
| File extension IDIF | Netscape Saved Address Book Identification |
| File extension IDL | Visual Studio Visual C++ Interface Definition Library Format |
| File extension IDLK | Adobe InDesign Lock Format |
| File extension IDLL | CodeWarrior DLL |
| File extension IDM | IData Mobile Data |
| File extension IDML | Adobe InDesign Markup Format |
| File extension IDMS | Adobe InDesign Format |
| File extension IDP | IBM Personal Communications Interchange Document Profile |
| File extension IDPK | Adobe InDesign Format |
| File extension IDPP | Adobe InDesign Format |
| File extension IDQ | Microsoft Internet Explorer Data Query |
| File extension IDRC | Adobe InDesign Resource |
| File extension IDS | Infinity Game Engine |
| File extension IDT | Windows Installer Exported Database Table Format |
| File extension IDV | Autodesk Inventor Design View Tree |
| File extension IDW | AutoDesk Inventor Drawing Format |
| File extension IDX | Index Format |
| File extension IDX0 | RuneScape Cache Index Format |
| File extension IDX255 | RuneScape Cache Index Format |
| File extension IDX_DLL | Microsoft Office IDX_DLL |
| File extension IDZ | I-DEAS Web Access |
| File extension IE3 | Internet Explorer 3 |
| File extension IEBARZIP | Explorer Bar Icon Pack |
| File extension IEC | Microsoft HTML Converter |
| File extension IEI | Image Eye Thumbnail Cache |
| File extension IEL | ParticleIllusion SE Emitter Library |
| File extension IEM | Informix Error Message |
| File extension IENV | IData 3 Envelope Template |
| File extension IES | IESNA Photometric Data Format |
| File extension IEX | The Tuttles Madcap Misadventures |
| File extension IF | IFwin Project Format |
| File extension IF9 | Pixel Power Collage Image |
| File extension IFAITH | IFaith Format |
| File extension IFB | Oracle Siebel Interface Configuration |
| File extension IFC | Industry Foundation Classes Format |
| File extension IFCXML | Industry Foundation Classes XML Format |
| File extension IFCZIP | Compessed IFC Format |
| File extension IFD | Adobe Output Designer Form (Jet Form Design Form) |
| File extension IFF | Autodesk Maya Image Interchange Format |
| File extension IFL | 3D Studio Max Animation Format List Control Format |
| File extension IFLV | InfoLevin Database |
| File extension IFM | Brighterion IPrevent Fraud Model |
| File extension IFN | IGOR Pro Formatted Notebook |
| File extension IFO | DVD Movie Information File Format |
| File extension IFP | Grand Theft Auto Animation Format |
| File extension IFR | Formula One 2001 Game |
| File extension IFS | InfoSlips Secure Information Package Format |
| File extension IFT | Canon Settings |
| File extension IFU | All Image Image |
| File extension IFV | Indeo Video Format |
| File extension IFW | INTUS Firmware Format |
| File extension IFX | Rational XDE |
| File extension IFZ | All Image Compressed Image |
| File extension IG | Instagram JPEG Picture Image |
| File extension IG2 | IGES CAD |
| File extension IGA | CARIS GIS Corner Georeferencing Coordinate |
| File extension IGB | Google Earth Model |
| File extension IGC | Anime List Builder Input Format |
| File extension IGE | Erdas Imagine Large Raster Spill |
| File extension IGES | Initial Graphics Exchange Specification Format |
| File extension IGG | SuiteProfiler Color Map Format |
| File extension IGI | Indigo Renderer Picture Image |
| File extension IGL | IGOR Game |
| File extension IGM | Indigo Renderer Material Texture Format |
| File extension IGMA | INTUS Graphics User Interface Format |
| File extension IGN | Adobe RoboHelp Ignore List Format |
| File extension IGO | Instagram JPEG Picture Image |
| File extension IGP | Igor Player Format |
| File extension IGR | SmartSketch Drawing Design Format |
| File extension IGS | IGES ASCII CAD Format |
| File extension IGT | IGrafx Document Template |
| File extension IGV | Integrative Genomics Viewer |
| File extension IGX | IGrafX FlowCharter Flow Chart Or Process Model Format |
| File extension IGY | Microsoft Excel Web Query |
| File extension IGZ | Gzipped Image |
| File extension IHA | GE Historian Archive |
| File extension IHC | Proficy Historian |
| File extension IHF | IGOR Pro Help |
| File extension IHS | Bink Inbound History |
| File extension IHTML | Inline HyperText Markup Language |
| File extension IHW | IN-HEH Timeline Workspace Format |
| File extension IHX | IN-HEH Timeline Database Format |
| File extension II | IconWorkshop Extended Information Format |
| File extension IID | IInstaller Idirectory |
| File extension IIE | SimIIe Emulator |
| File extension IIF | QuickBooks Interchange Format |
| File extension III | Know Your Stuff |
| File extension IIL | CleanSweep Installation Log |
| File extension IIM | IOpus Internet Macro Format |
| File extension IIMG | Interleaf Image Format |
| File extension IIP | ThinAnywhere Configuration Format |
| File extension IIQ | Phase One RAW Image Format |
| File extension IIS | PHOTOfunSTUDIO HD Video |
| File extension IIT | Install Creator Settings Format |
| File extension IIX | Trados Translation Memory Index Format |
| File extension IJS | J Interpretor Script Format |
| File extension IK | CryENGINE IK Animation Format |
| File extension IKF | INTUS Keyboard Settings Format |
| File extension IKMP | SampleTank Preset |
| File extension IKS | Microsoft InkSeine Document |
| File extension IL | Euphoria Shrouded Source Code |
| File extension IL3 | ParticleIllusion 3 Emitter Library |
| File extension ILA | LohnViewer Document |
| File extension ILABEL | IData 3 Template Label |
| File extension ILB | Scream Tracker Data |
| File extension ILBM | Interleaved Bitmap Format |
| File extension ILDOC | BroadVision QuickSilver Document Format |
| File extension ILF | Alim |
| File extension ILG | MakeIndex Error Log |
| File extension ILHT | Safari Internet Location |
| File extension ILK | Incremental Linking Format |
| File extension ILL | Illust Logic Puzzle |
| File extension ILM | Opus Creator Multimedia |
| File extension ILOCK | IData |
| File extension ILP | Gurobi Optimizer Temporary |
| File extension ILS | Internet Security And Acceleration Server Summary |
| File extension ILX | Interlex Vocabulary |
| File extension IM | SunOS Grey Scale Bitmap |
| File extension IM24 | Bitmap Graphic |
| File extension IM32 | Sun 32bit Raster |
| File extension IM5 | Visilog Image |
| File extension IM7 | DaVis Graphics |
| File extension IM8 | Sun Raster Graphic |
| File extension IMA | Generic Disk Image |
| File extension IMA4 | Apple QuickTime IMA4 Encoded Audio |
| File extension IMAGE | ShrinkWrap Disk Image Format |
| File extension IMAP | Merak Mail Server Internet Message Access Protocol |
| File extension IMAPMBOX | Apple Mail Format |
| File extension IMB | IncredMail Adress Book And Temporary Contacts |
| File extension IMC | LucasArts Game Sound |
| File extension IMD | GIS Image Metadata Format |
| File extension IME | Global Input Method Editor |
| File extension IMELODY | IMelody Mobile Phone Ring-tone Format |
| File extension IMESX | Microsoft Office IME Search Provider Definition |
| File extension IMF | Apogee IMF Audio File Format |
| File extension IMG | Floppy Image Image Format |
| File extension IMG3 | Apple IOS Img3 Encrypted Or Signed Container Format |
| File extension IMGA | Marathon 2 Aleph One Image Format |
| File extension IMGB | Final Fantasy XII Model |
| File extension IMGPART | Apple Mac NDIF Split Image |
| File extension IMH | IncrediMail Contacts Export |
| File extension IMI | Magellan Map Format |
| File extension IMJ | Pegasus Image Corp Format Bitmap Graphics Format |
| File extension IMK | IncrediMail Licence |
| File extension IML | ACT! Internet Mail Message Format |
| File extension IMM | IncrediMail Deleted Email Messages List |
| File extension IMMODULES | GTK+ Module Format |
| File extension IMN | IncrediMail Notify |
| File extension IMO | IMON Manager Settings |
| File extension IMOTION | IClone Motion Capture |
| File extension IMOVIEEVENT | IMovie Library |
| File extension IMOVIELIBRARY | IMovie Event Library |
| File extension IMOVIEMOBILE | IMovie Project Package |
| File extension IMOVIEPROJ | Apple IMovie Project Format |
| File extension IMOVIEPROJECT | Apple IMovie Project Format |
| File extension IMP | FileMaker Pro Import Data Filter |
| File extension IMPORTED | UTorrent Torrent |
| File extension IMR | IBM Cognos Impromptu Report Format |
| File extension IMS | IconForge Create Executable Library Data |
| File extension IMSCC | Canvas Exported Course |
| File extension IMSP | Survey Designer Survey |
| File extension IMT | IMNET Graphics Image Format |
| File extension IMTX | IMindMap Template |
| File extension IMV | ImageMixerVCD Project |
| File extension IMW | IncrediMail Sound |
| File extension IMX | DaVis Image |
| File extension IMY | IMelody Mobile Phone Ring-tone Format |
| File extension IMZ | WinImage Compressed Disk Image |
| File extension IN | McAfee Antivirus Format |
| File extension IN3 | Harvard Graphics Input Device Driver |
| File extension IN4 | InfoBlaster IN4 Registry |
| File extension IN7 | Ox Data |
| File extension INA | MS-DOS |
| File extension INB | Rebel Assault Backup |
| File extension INC | HTML Server Side Include Format |
| File extension INCA | Adobe InDesign Format |
| File extension INCD | Adobe InDesign Format |
| File extension INCP | Adobe InCopy CS3 Package Format |
| File extension INCT | Adobe InCopy Template Format |
| File extension INCX | Adobe InDesign Format |
| File extension IND | Adobe InDesign Graphics Document Format |
| File extension INDB | Adobe InDesign Book Format |
| File extension INDD | Adobe InDesign Document Format |
| File extension INDESIGNPLUGIN | Adobe InDesign Plugin Format |
| File extension INDEX | Eclipse Help Index |
| File extension INDEXARRAYS | Mac OS X Spotlight |
| File extension INDEXCOMPACTDIRECTORY | Mac OS X Spotlight |
| File extension INDEXDIRECTORY | Mac OS X Spotlight |
| File extension INDEXPOSITIONS | Mac OS X Spotlight |
| File extension INDEXPOSITIONTABLE | Mac OS X Spotlight |
| File extension INDK | Adobe InDesign Format |
| File extension INDL | Adobe InDesign Object Library Format |
| File extension INDN | Adobe InDesign For Mac |
| File extension INDP | Adobe InDesign Package Format |
| File extension INDS | Adobe InDesign Format |
| File extension INDT | Adobe InDesign Template Format |
| File extension INDX | Microsoft Mail Index |
| File extension INETLOC | Apple Mac OS X Finder Internet Location Format |
| File extension INF | Windows Installation Script Format |
| File extension INFO | ZoomBrowser Image Index Format |
| File extension INFO-1 | Cygwin Info |
| File extension INFO-10 | Cygwin Info |
| File extension INFO-11 | Cygwin Info |
| File extension INFO-12 | Cygwin Info |
| File extension INFO-13 | Cygwin Info |
| File extension INFO-14 | Cygwin Info |
| File extension INFO-15 | Cygwin Info |
| File extension INFO-16 | Cygwin Info |
| File extension INFO-17 | Cygwin Info |
| File extension INFO-18 | Cygwin Info |
| File extension INFO-19 | Cygwin Info |
| File extension INFO-2 | Cygwin Info |
| File extension INFO-20 | Cygwin Info |
| File extension INFO-21 | Cygwin Info |
| File extension INFO-22 | Cygwin Info |
| File extension INFO-23 | Cygwin Info |
| File extension INFO-24 | Cygwin Info |
| File extension INFO-25 | Cygwin Info |
| File extension INFO-26 | Cygwin Info |
| File extension INFO-27 | Cygwin Info |
| File extension INFO-28 | Cygwin Info |
| File extension INFO-29 | Cygwin Info |
| File extension INFO-3 | Cygwin Info |
| File extension INFO-30 | Cygwin Info |
| File extension INFO-4 | Cygwin Info |
| File extension INFO-5 | Cygwin Info |
| File extension INFO-6 | Cygwin Info |
| File extension INFO-7 | Cygwin Info |
| File extension INFO-8 | Cygwin Info |
| File extension INFO-9 | Cygwin Info |
| File extension INFOPATHXML | Microsoft InfoPath Form Format |
| File extension INF_LOC | Microsoft Windows Installation Format |
| File extension ING | MasterCook Ingredients Format |
| File extension INGR | Intergraph Raster File Format |
| File extension INH | Microsoft Visual Basic Basfwin |
| File extension INI | Text Configuration Format |
| File extension INI-DIST | PHP INI |
| File extension INI-RECOMMENDED | PHP INI |
| File extension INI2 | Text Configuration |
| File extension INIT | WM Keeper CLASSIC Temporary Keys |
| File extension INIX | Adobe InDesign |
| File extension INJB | Adobe InDesign |
| File extension INK | Mimio Ink Data Format |
| File extension INL | Microsoft Visual C++ Inline Function Format |
| File extension INLK | Adobe InDesign Lock Format |
| File extension INM | FaxMaster Document |
| File extension INMS | Adobe InDesign Menu Set Format |
| File extension INN | Phantasmagoria Ini |
| File extension INO | Inno Setup Script Format |
| File extension INP | Abaqus Input Format |
| File extension INPROGRESS | Apple Mac OS X Time Machine Temporary Format |
| File extension INPUTPLUGIN | Apple Mac OS X PluginIM Input Method |
| File extension INPX | PTV Vissim Network |
| File extension INRS | Adobe InDesign For Mac |
| File extension INS | InstallShield Script Format |
| File extension INSANIQUARIUMDELUXESAVEDGAME | Insaniquarium Deluxe Save Game |
| File extension INSP | Microsoft Visual Studio Inspector |
| File extension INSS | Apple Mac OS X Setup Assistant ISP Info Document |
| File extension INST | RMCProfile Peak Profile |
| File extension INSTALLHELPER | Apple Mac OS X Install Helper Document |
| File extension INSTALLLOG | Microsoft .NET Installation Log |
| File extension INSTALL_BACKUP | AVG Shell Extension Module |
| File extension INSX | InScribe XML Document |
| File extension INT | SGI Integer Image |
| File extension INT? | Quicken For Mac |
| File extension INTAGLIO | Intaglio Drawing |
| File extension INTERNETCONNECT | Apple Mac OS X System Preferences Internet Connect Document Format |
| File extension INTU | Quicken For Mac |
| File extension INUSE | Text Configuration File (in Use) |
| File extension INV | Minecraft INVedit Format |
| File extension INVENTOR | SGI Open Inventor |
| File extension INX | Adobe InDesign Interchange File Format |
| File extension IN_ | Microcoft Setup Information |
| File extension IO | CPIO Compressed File Archive |
| File extension IOBIT | Advanced SystemCare PRO Backup Format |
| File extension IOC | Winamp Io Extension |
| File extension IOCA | IBM Image Object Content Architecture (IOCA) Bitmap Graphics |
| File extension IOK | Omniscope Configuration |
| File extension ION | Description Format |
| File extension IOPLIST | Apple Mac OS X Ioplist Format |
| File extension IOR | Maxwell Render Index Of Refraction |
| File extension IP | IconPackager Theme Format |
| File extension IP3 | ParticleIllusion Project |
| File extension IPA | IPhone Application |
| File extension IPALIAS | Apple IPhoto Alias Format |
| File extension IPB | IPhone Perl Script |
| File extension IPC | IncrediFlash Tools Image |
| File extension IPCC | Apple IOS Carrier Update Format |
| File extension IPCH | Microsoft Visual C++ Intellisense Precompiled Header Format |
| File extension IPD | BlackBerry Backup (pre 2012) Format |
| File extension IPDB | IP Address Tracker IP Database |
| File extension IPF | Microsoft SMS Installer Script |
| File extension IPG | IPod Game Package Format |
| File extension IPH | InterPaint (Hires) Image Format |
| File extension IPHOTO | Apple IPhoto Library Format |
| File extension IPHOTOPROJECT | Apple IPhoto Printing Project |
| File extension IPI | Microsoft Windows Installer |
| File extension IPICK | IPick Football Picture Image Format |
| File extension IPJ | AutoDesk Inventor Project Format |
| File extension IPK | Shana Informed Filler Format |
| File extension IPKG | Indicore SDK Package |
| File extension IPL | CorelDRAW Pantone Spot Reference Palette Format |
| File extension IPL22 | PLATO Learning Network Temporary |
| File extension IPLB | Apple IPhoto Library Archive |
| File extension IPMETA | Apple IPhoto Library Metadata Format |
| File extension IPN | AutoDesk Inventor Presentation File Format |
| File extension IPO | InstallShield Object Project |
| File extension IPOD | Rockbox Executable Application |
| File extension IPP | Inline Guard Macro Format |
| File extension IPPROJ | Microsoft Visual Studio InfoPath Project |
| File extension IPR | IntelliJ Project XML Data Format |
| File extension IPROJECT | IClone Project Format |
| File extension IPS | International Patching System Binary Patch Format |
| File extension IPSPOT | Apple IPhoto Index Format |
| File extension IPSW | IPhone, IPad Or IPod Touch Software Firmware Update Format |
| File extension IPT | AutoDesk Inventor Part Format |
| File extension IPTHEME | IconPackager Theme Format |
| File extension IPUTILS | Gnome Desktop |
| File extension IPX | Ipix Spherical Panorama Format |
| File extension IPZ | ICQ Plus Skin |
| File extension IQC | CADIQ Comparison Analysis Result |
| File extension IQD | Impromptu Defintion |
| File extension IQF | Integra Query |
| File extension IQP | 20-20 Office Sales Exported Quote |
| File extension IQR | Cadiq View Analysis Results Data |
| File extension IQS | CADIQ Summary Log |
| File extension IQT | Tektronix |
| File extension IQU | AmeriCalc Update |
| File extension IQY | Microsoft Excel Internet Query Format |
| File extension IRAF | IRAF |
| File extension IRAFHOSTS | IRAF User |
| File extension IRBRC | Ruby |
| File extension IRC | JIRCii Script |
| File extension IRCP | Adobe SpeedGrade Project Format |
| File extension IRD | Microsoft Money Temporary |
| File extension IREV | Runtime Revolution Script |
| File extension IRF | Autodesk Impression Drawing Format |
| File extension IRG | Sofya Database Interclass Relation Graph |
| File extension IRIS | Silicon Irix Graphics Raw Format |
| File extension IRIX6 | Irix 6 |
| File extension IRIX64BIT | Irix 64 Bit Make |
| File extension IRL | IBM WebSphere ILOG JRules Rule Language |
| File extension IROBO | RoboMind Source Code |
| File extension IROCK | IntelliRock Sensor Data Format |
| File extension IROS | Adobe Save For Web Settings Format |
| File extension IRP | Microsoft ISA Server Report Generator Output Format |
| File extension IRR | UVBrewer Brewer Lamp Format |
| File extension IRRMESH | Irrlicht Static Mesh |
| File extension IRS | Adobe Photoshop Optimized Setting Format |
| File extension IRV | XMap Workfile |
| File extension IRX | UVBrewer Brewer Lamp Irradiation Format |
| File extension IS | InStereo Audio |
| File extension IS1 | SmartWare Input Screen Format |
| File extension IS2 | SmartWare Input Screen |
| File extension IS3 | SmartWare Input Screen |
| File extension IS4 | SmartWare Input Screen |
| File extension ISA | Adobe Photoshop ImageReady Action |
| File extension ISALE | ISale Auction |
| File extension ISALETEMPLATE | ISale Template |
| File extension ISALLIC | ISale License |
| File extension ISB | Vanguard Music |
| File extension ISC | Xilinx Device Configuration Information Format |
| File extension ISCORRUPT | Skype |
| File extension ISD | InstallShield Dialog Format |
| File extension ISE | InstallShield Express Project Format |
| File extension ISF | Inspiration Diagram Format |
| File extension ISFF | Intergraph Standard File Format |
| File extension ISH | ISH Compressed Archive |
| File extension ISH1 | Animation-ish Wiggledoodle-ish Document Format |
| File extension ISH2 | Animation-ishFlipBook-ish Document Format |
| File extension ISH3 | Animation-ish Advanced-ish Document Format |
| File extension ISL | InstallShield Temporary Installer |
| File extension ISM | InstallShield Project Format |
| File extension ISMA | IIS Smooth Streaming Audio Format |
| File extension ISMC | Smooth Streaming Client Manifest Format |
| File extension ISMCLIP | IStopMotion Animation Clip |
| File extension ISMV | Smooth Streaming Fragmented MPEG-4 Video Format |
| File extension ISN | InstallShield Installer Source Format |
| File extension ISO | CD/DVD/HD DVD/Blu-ray Disc ISO Binary Image Format |
| File extension ISOZ | Arbortext IsoDraw Compressed Drawing Format |
| File extension ISP | Internet Service Provider Settings Format |
| File extension ISPC | Image Surfer Pro Album Format |
| File extension ISQ | MicroCT Image |
| File extension ISR | InstallShield Uninstall Information Format |
| File extension ISS | ISS Picture Image Format |
| File extension IST | Adobe ImageStyler Format |
| File extension ISTG | ISOE Imagine Stage |
| File extension ISU | InstallShield Uninstall Script Format |
| File extension ISV | IDL ITools State |
| File extension ISWP | Apple ITunes IOS Firmware Update |
| File extension ISX | Intrasis Object |
| File extension ISYM | ArchiCAD For MAC Geometric Description Language |
| File extension ISZ | UltraISO Compressed Disk Image Format |
| File extension IT | Impulse Tracker Music Module Format |
| File extension ITA | IconTweaker Theme Archive |
| File extension ITB | ITunes Library Extras |
| File extension ITC | ITunes Cover Flow Data Format |
| File extension ITC2 | Apple ITunes Cover Flow Data Format |
| File extension ITCL | Cygwin Iwidgets Scripts |
| File extension ITD | SDL Trados Translation |
| File extension ITDB | Apple ITunes Database Format |
| File extension ITE | Apple ITunes Extras Format |
| File extension ITEMDATA-MS | Windows 8 Start Screen Item Data Format |
| File extension ITG | Intergraph Format Bitmap Graphics |
| File extension ITHMB | Apple IPhone, IPad, IPod Thumbnail Image Format |
| File extension ITI | Impulse Tracker Instrument |
| File extension ITK | ScummVM Game Data Format |
| File extension ITL | Apple ITunes Music Database Format |
| File extension ITLP | Apple ITunes LP Format |
| File extension ITLS | Apple ITunes Live Stream Format |
| File extension ITM | IThink Model Format |
| File extension ITMS | Apple ITunes Store URL Format |
| File extension ITMSP | Apple ITunes Store Package Format |
| File extension ITMZ | IThoughtsHD Mind-map Document |
| File extension ITN | TomTom Navigator Itinerary Format |
| File extension ITP | BioWare Aurora Game Engine Palette |
| File extension ITPC | Apple ITunes Podcast Subscription Format |
| File extension ITQ | SAIA S-Web Variable Initialization |
| File extension ITR | Icy Tower Format |
| File extension ITS | Impulse Tracker Sample Format |
| File extension ITT | IconTweaker Theme Format |
| File extension ITW | InTouch With Database Format |
| File extension ITX | IBM FileNet EForms ITX Form Template Format |
| File extension ITXIB | Apple ITunes Dump |
| File extension ITZ | Impulse Tracker Music Module |
| File extension IUP | ChessBase Fritz Update Format |
| File extension IUS | InfoTMIC Android Update Format |
| File extension IV | SGI Inventor VRML Format |
| File extension IV2I | Norton Ghost Disk Drive Image |
| File extension IVA | Surveillance Video Format |
| File extension IVB | Truevision Targa Format Bitmap Graphics |
| File extension IVC | IView MediaPro Catalogue Format |
| File extension IVD | Bitdefender Incremental Virus Definitions Format |
| File extension IVE | OpenSceneGraph Format |
| File extension IVEX | Worldviz Vizard Encrypted |
| File extension IVF | Indeo Video Format |
| File extension IVI | MSDN InfoViewer Topic |
| File extension IVL | IBM ILOG JViews Maps Map |
| File extension IVM | Interactive Visual Media Video Format |
| File extension IVP | Panorama |
| File extension IVR | Virtual Reality World (iSeeMedia Image World) |
| File extension IVS | Internet Streaming Video |
| File extension IVT | Beyond 20/20 Table Aggregate Data Format |
| File extension IVU | ImmerVision XML User Interface |
| File extension IVUE | Live Picture Image Format |
| File extension IVWR | IntelliView Offline Report |
| File extension IVX | Beyond 20/20 Microdata Directory |
| File extension IW | Chain Engineering Database Format |
| File extension IW4 | DjVu Image Format |
| File extension IW44 | DjVu Image Format |
| File extension IWB | Common File Format |
| File extension IWC | Installwatch Database |
| File extension IWD | Call Of Duty Game Archive Format |
| File extension IWDGT | Apple IWeb Widget Format |
| File extension IWI | Infinity Ward Texture Format |
| File extension IWL | WebSite X5 License |
| File extension IWM | IWriteMusic |
| File extension IWP | InfinityQS ESPC |
| File extension IWPRJ | Website X5 Project |
| File extension IWS | Trojan-Downloader.JS.Agent Format |
| File extension IWT | Sunnysoft InterWrite Full Keyboard Skin |
| File extension IWXDATA | IWorx Data Format |
| File extension IWZ | InstallShield Express Project Format |
| File extension IWZIP | Website X5 Project |
| File extension IX | DtSearch Index Format |
| File extension IX2 | Rebel Chess Program Database Format |
| File extension IX3 | Instant.Exe 3.0 Script |
| File extension IX4 | Rebel Chess |
| File extension IXA | Ulead Disc Image Format |
| File extension IXB | Ulead Disk Image Format |
| File extension IXC | ArcView Geocoding Index For Read-write Coverages |
| File extension IXF | Integration Exchange Format |
| File extension IXI | IxiQuarks Preferences |
| File extension IXL | DB/TextWorks Database Indexed List |
| File extension IXS | ArcView Geocoding Index For Read-write Shape |
| File extension IXW | ERDAS IMAGINE Toolbar Setting |
| File extension IZD | Intrexx Application Export Format |
| File extension IZE | IZArc Encrypted Archive Format |
| File extension IZS | 1st Page 2000 JavaScript Example |
| File extension IZZ | Isadora Media Control Project Format |
| File extension IZZY | Isadora Project Format |
File extensions in alphabetical order: I
The list of file extensions, sorted alphabetically, beginning with the letter I