File types with extensions that start with the letter I

File Extention	File Type	Description
.i	Developer	INTERCAL Source File
.i	Developer	Visual Studio Intermediate File
.i00	Disk Image	DVD Shrink Part 1 File
.i01	Disk Image	DVD Shrink Part 2 File
.i02	Disk Image	DVD Shrink Part 3 File
.i3d	Raster Image	Houdini Image 3D File
.i3pack	Game	Point Blank Game Data File
.i5z	Data	IUCLID 5 Import/Export File
.iaa	Audio	INTUS Audio Archive
.iaf	Settings	Outlook Internet Account File
.iam	CAD	Inventor Assembly File
.ias	Data	Intermodulation Analysis System File
.ib	Database	InterBase Database
.ib2	Game	IncrediBots 2 Saved Challenge File
.ib3	Game	IncrediBots 3 Saved Challenge File
.iba	Data	iBooks Author Document
.iba	CAD	Lectra Clothing Design Pieces File
.ibatemplate	Data	iBooks Author Document Template
.ibb	Disk Image	ImgBurn Project File
.ibcd	Data	InstantBingoCard Document
.ibooks	Data	Multi-Touch iBook
.ibp	Disk Image	IsoBuster Managed Image Information File
.ibplugin	Plugin	Interface Builder Plug-in
.ibq	Disk Image	IsoBuster Managed Image File
.ibro	Game	IncrediBots Robot File
.ibt	Game	Texture and Model File
.ic1	Raster Image	Low Resolution Imagic Graphics File
.ic2	Raster Image	Medium Resolution Imagic Graphics File
.ic3	Raster Image	High Resolution Imagic Graphics File
.ic3d	CAD	IC3D Scene File
.ica	Raster Image	Image Object Content Architecture File
.ica	Settings	Citrix ICA File
.ical	Misc	iCalendar File
.icalendar	Misc	iCalendar File
.icalevent	Data	iCal Event File
.icaltodo	Data	iCal To Do File
.icap	Page Layout	InCopy Package File
.icb	Raster Image	Targa ICB Bitmap Image
.icbu	Backup	iCal Backup File
.icc	Settings	ICC Profile
.icd	Executable	SafeDisc Encrypted Program
.icd	Settings	Installable Client Driver File
.icd	CAD	IronCAD 3D Drawing File
.ice	Compressed	ICE File Archive
.icf	Backup	Zoom Router Configuration File
.icg	Data	Image Comparer Gallery File
.ichat	Data	iChat Saved Chat Log
.icl	System	Windows Icon Library File
.icm	Settings	Image Color Matching Profile
.icma	Misc	InCopy Assignment File
.icml	Page Layout	InCopy Document
.icmt	Page Layout	InCopy Template
.icn	Raster Image	Windows Icon File
.icns	System	Mac OS X Icon Resource File
.ico	System	Icon File
.icon	Raster Image	Icon Image File
.iconpackage	System	IconPackager Theme File
.icontainer	Misc	CandyBar iContainer File
.icpr	Raster Image	IconUtils Project File
.icr	Data	Image Comparer Results File
.ics	CAD	IronCAD 3D Drawing File
.ics	Misc	iCalendar File
.ics	Audio	IC Recorder Sound File
.icst	Settings	InCopy Document Preset File
.icursorfx	Settings	iCursor Effect File
.id	Misc	Lotus Notes User ID File
.id2	Data	Windows Live Messenger Emoticon File
.idap	Page Layout	Adobe InDesign Assignment Package
.idb	Database	IDA Database File
.idb	Developer	Visual Studio Intermediate Debug File
.idc	Web	Internet Database Connector File
.iddx	Settings	Static Default File
.ide	CAD	Inventor iFeature File
.idea	Encoded	Tresor IDEA Encrypted File
.idea	Vector Image	Adobe Ideas Document
.idf	Settings	MIDI Instrument Definition File
.idl	Developer	Interface Definition Language File
.idlk	Misc	Adobe InDesign Lock File
.idml	Page Layout	Adobe InDesign Markup Language File
.idms	Page Layout	Adobe InDesign Snippet
.idpk	Page Layout	Adobe InDesign Package for GoLive File
.idpp	Settings	Adobe InDesign Preflight Profile
.idt	Developer	Windows Installer Database Text Archive File
.idv	CAD	Inventor Design View File
.idw	CAD	Inventor Drawing
.idx	Text	Outlook Express Mailbox Index File
.idx	Misc	Movie Subtitle File
.idx	Data	Navigation POI File
.idx	Data	HMI Historical Log Index File
.idx	System	Index File
.idx0	Game	Runescape Cache Index File
.idx255	Game	Runescape Cache File
.ies	Data	IES Photometric Data File
.if	CAD	Procedimientos-Uno IFWin Project File
.ifaith	Data	iFaith SHSH File
.ifc	3D Image	Industry Foundation Classes File
.ifcxml	CAD	Industry Foundation Classes XML File
.ifczip	CAD	Compessed IFC File
.ifd	Page Layout	InForm Document
.iff	Audio	Interchange File Format
.ifl	Misc	3ds Max Image File List
.ifo	Video	DVD-Video Disc Information File
.ifp	Game	GTA Animation File
.ifs	Data	InfoSlips Package
.ifw	System	INTUS Firmware File
.igc	Data	Anime List Builder Input File
.iges	3D Image	IGES File
.igg	Data	SuiteProfiler Color Map File
.igm	3D Image	Indigo Renderer Material File
.igma	Data	INTUS Graph Mask Archive
.ign	Data	RoboHelp Ignore List File
.igp	Audio	Igor Published Music Notation File
.igr	Settings	Quest3D Channel Group Layout File
.igr	Audio	Igor Engraver File
.igs	3D Image	Indigo Renderer Scene File
.igs	CAD	IGES Drawing File
.igt	Vector Image	iGrafx Document Template
.igx	Vector Image	iGrafx Document
.ihw	Settings	IN-HEH Timeline Workspace
.ihx	Database	IN-HEH Timeline Database
.ii	Data	IconWorkshop Extended Information File
.iif	Data	Intuit Interchange Format File
.iil	Text	CleanSweep Installation Log
.iim	Executable	iMacro Macro File
.iip	Settings	ThinAnywhere Configuration File
.iip	Settings	Install Creator Pro Project File
.iiq	Camera Raw	Phase One RAW Image
.iit	Settings	Install Creator Project File
.iix	Misc	Translation Memory Index File
.ik	3D Image	CryENGINE IK Animation File
.ikf	Settings	INTUS Keyboard File
.ilbm	Raster Image	Interleaved Bitmap Image
.ildoc	Page Layout	QuickSilver Document
.ilk	Developer	Incremental Linking File
.ima	Data	Sage ACT! Email Message
.ima	Disk Image	Disk Image
.image	Data	OpenQwaq Image
.image	Disk Image	Apple Disk Image
.imapmbox	Misc	IMAP Mailbox
.imd	GIS	GIS Image Metadata File
.imd	Vector Image	Microsoft VisioModeler File
.ime	System	Windows Input Method Editor File
.imf	Audio	Id Music File
.img	Disk Image	Floppy Disk Image
.img	GIS	Garmin Map File
.img	Raster Image	GEM Image
.img	Game	Grand Theft Auto Data File
.img	Disk Image	Macintosh Disk Image
.img	GIS	ERDAS IMAGINE Image File
.img	Disk Image	Disc Image Data File
.img3	System	iPhone IMG3 File
.imga	Game	Aleph One Image File
.imi	GIS	Magellan Map File
.imj	Raster Image	JFIF Bitmap Image
.iml	Developer	IntelliJ IDEA Module
.iml	Misc	ACT! Internet Mail Message
.immodules	Settings	GTK+ Module File
.imovieproj	Video	iMovie Project File
.imovieproject	Video	iMovie Project
.imp	Audio	Audition Impulse File
.imp	Spreadsheet	Improv Spreadsheet
.imr	Data	Impromptu Report File
.imt	Data	My Time Data File
.imy	Misc	iMelody Ringtone File
.imz	Disk Image	WinImage Compressed Disk Image
.in	Misc	Spyware File
.in	Data	Input File
.inc	Developer	Include File
.inca	Misc	InCopy CS3 Assignment File
.incd	Page Layout	InCopy Document
.incp	Data	InCopy CS3 Package File
.inct	Page Layout	InCopy Template
.incx	Page Layout	InCopy CS3 Interchange File
.ind	Page Layout	Adobe InDesign Document
.ind	Misc	Memory Stick Formatting File
.indb	Page Layout	Adobe InDesign Book File
.indd	Page Layout	Adobe InDesign Document
.indesignplugin	Plugin	Adobe InDesign Plug-in
.indk	Misc	Adobe Shortcut Set File
.indl	Page Layout	Adobe InDesign Library
.indp	Page Layout	Adobe InDesign CS3 Package File
.inds	Page Layout	Adobe InDesign Snippet File
.indt	Page Layout	Adobe InDesign Template
.inetloc	Misc	Internet Location
.inf	Settings	Setup Information File
.inf_loc	System	Windows Driver Information Cache File
.info	Misc	Generic Information File
.info	Plugin	Drupal Module Information File
.info	Misc	Texinfo Document
.info	Raster Image	ZoomBrowser Image Index File
.infopathxml	Page Layout	Microsoft InfoPath Form
.ing	Misc	MasterCook Ingredients File
.ini	Settings	Gravis UltraSound Bank Setup File
.ini	Settings	Windows Initialization File
.ini	Data	Finale Preferences File
.ini	Settings	Symbian OS Configuration File
.ink	Vector Image	InkML Image
.ink	Vector Image	Pocket PC Handwritten Note
.ink	Data	Mimio Ink Data File
.ink	Raster Image	Pantone Reference File
.inl	Developer	C++ Inline File
.inlk	Misc	Adobe InDesign Lock File
.inm	Misc	FaxMaster Document
.inms	Settings	Adobe InDesign Menu Set File
.ino	Developer	Arduino Sketch File
.inp	Video	Sony Camcorder Image Management File
.inp	Page Layout	Urdu InPage Document
.inp	Data	Abaqus Input File
.inp	Game	MAME Replay File
.inprogress	Backup	Time Machine Backup Progress File
.ins	Settings	Internet Settings File
.ins	Audio	Ensoniq Instrument
.ins	Data	LaTeX Installer Script
.ins	Audio	Sample Cell II Instrument Definition File
.ins	Audio	Adlib Tracker Instrument File
.ins	Data	Inspiration File
.ins	System	Internet Naming Service File
.int	Video	Sony Camcorder Image Management File
.int	Raster Image	SGI Integer Image
.internetconnect	System	Apple Internet Connect Document
.inv	Game	INVedit File
.inx	Data	Compiled Script
.inx	Page Layout	Adobe InDesign Interchange File
.inx	Plugin	Inkscape Extension Descriptor File
.iobit	Misc	Advanced SystemCare Rollback File
.ion	System	File Description File
.ioplist	System	Mac OS X IOPLIST File
.ip	Data	IconPackager Theme File
.ipa	Executable	iOS Application
.ipalias	Data	iPhoto Alias File
.ipcc	Settings	iPhone Carrier Bundle
.ipch	Developer	Intellisense Precompiled Header File
.ipd	Backup	BlackBerry Backup File
.ipf	Disk Image	Interchangeable Preservation File
.ipf	CAD	iMPACT Project File
.ipf	Executable	SMS Installer Script
.ipf	Text	OS/2 Help File
.ipg	Compressed	iPod Game File
.iphoto	Data	iPhoto Library File
.iphotoproject	Raster Image	iPhoto Print Project
.ipick	Raster Image	iPick Football Image
.ipj	CAD	Inventor Project File
.ipk	Compressed	Itsy Package
.ipl	Game	GTA Item Placement File
.iplb	Data	iPhoto Library Archive Document
.ipmeta	Data	Apple iPhoto Metadata File
.ipn	CAD	Inventor Presentation File
.ipod	System	Rockbox Firmware File
.ipp	Developer	Inline Guard Macro File
.ipr	Developer	IntelliJ IDEA Project File
.ipr	Developer	InstallShield Professional Project File
.ipr	Data	iProcrastinate Data File
.iproject	Data	iClone Project File
.ips	Game	Internal Patching System Patch File
.ipspot	Text	iPhoto Spot File
.ipsw	Misc	iPod and iPhone Software Update File
.ipt	CAD	Inventor Part File
.iptheme	System	IconPackager Raw Theme File
.ipx	Raster Image	IPIX Image
.iqy	Web	Internet Query
.ircp	Video	SpeedGrade IRIDAS Composite File
.irf	Video	CCTV DVR H.264 Video File
.irock	Data	intelliRock Sensor Data File
.iros	Settings	Adobe Save For Web Settings File
.irp	Data	Internet Researcher Project File
.irr	Data	Brewer Lamp File
.irr	3D Image	Irrlicht 3D Scene
.irrmesh	3D Image	Irrlicht Static Mesh File
.irs	Settings	Adobe Save For Web Settings
.irx	Data	Brewer Irradiation File
.is1	Data	Synergy/DE Data Index File
.is1	Data	M3 Sakura Real-Time Save 1 File
.isc	Developer	Xilinx Device Configuration File
.isd	Page Layout	Flexera InstallShield Dialog Box File
.ise	CAD	Xilinx ISE Project
.ise	Developer	InstallShield Express Project File
.isf	Data	Inspiration Flowchart Document
.ish	Compressed	ISH Compressed Archive
.ish1	Data	Animation-ish Wiggledoodle-ish Document
.ish2	Data	Animation-ish FlipBook-ish Document
.ish3	Data	Animation-ish Advanced-ish Document
.ism	Video	IIS Smooth Streaming Manifest File
.ism	Developer	InstallShield Project File
.isma	Audio	IIS Smooth Streaming Audio File
.ismc	Video	Smooth Streaming Client Manifest File
.ismclip	Video	iStopMotion Animation Clip
.ismv	Video	IIS Smooth Streaming Video File
.isn	Misc	Installer Source Files
.iso	CAD	Arbortext IsoDraw Document
.iso	Disk Image	Disc Image File
.isoz	CAD	Compressed Arbortext IsoDraw Illustration
.isp	Settings	IIS Internet Service Provider Settings
.ispc	Data	Image Surfer Pro Collection File
.isr	Game	GoMoku Game File
.iss	Settings	Inno Setup Script
.iss	Settings	InstallShield Silent Response File
.ist	Data	Inspiration Template
.ist	Developer	InstallShield Project Template File
.isu	Executable	InstallShield Uninstaller Script
.isz	Disk Image	Zipped ISO Disk Image
.it	Audio	Impulse Tracker Module
.ita	Executable	VTech InnoTab Application File
.ita	Compressed	IconTweaker Theme Archive
.itc	Misc	iTunes Cover Flow Data File
.itc2	Raster Image	iTunes Cover Flow Data File 2
.itdb	Database	iTunes Database File
.ite	Data	iTunes Extras File
.itemdata-ms	System	Windows 8 Start Screen Item Data File
.ithmb	Raster Image	iPod and iPhone Photo Thumbnails File
.iti	Audio	Impulse Tracker Instrument
.itk	Game	ScummVM Game Data File
.itl	Data	iTunes Library File
.itlp	Data	iTunes LP Album File
.itls	Audio	iTunes Live Stream URL
.itm	Data	iThink Model File
.itms	Web	iTunes Music Store Link File
.itmsp	Data	iTunes Store Package
.itn	Data	TomTom Navigator Itinerary File
.itpc	Web	iTunes Podcast Link File
.itr	Game	Icy Tower Replay File
.its	System	Internet Document Set
.its	Audio	Impulse Tracker Sample
.itt	Settings	IconTweaker Theme File
.itw	Database	InTouch With Database File
.itx	Data	ITX Form Template
.iup	Data	Fritz Update File
.ius	System	InfoTMIC Firmware Update File
.iv	3D Image	Open Inventor Scene Graph File
.iv2i	Backup	Norton Ghost Incremental Virtual Volume Image
.iva	Misc	Dementia.4207 Virus File
.iva	Video	Surveillance Video File
.ivc	Data	InteliSea Vessel Configuration File
.ivd	Data	Bitdefender Incremental Virus Definitions File
.ive	3D Image	OpenSceneGraph Binary File
.ivf	Video	Indeo Video Format File
.ivr	Raster Image	Image Worlds File
.ivr	Video	Internet Video Recording
.ivs	Video	Internet Streaming Video
.ivs	Data	Initialization Vector File
.ivt	Game	International Volleyball 2006 Data File
.ivt	Data	Beyond 20/20 Table File
.ivue	Raster Image	Live Picture IVUE Image
.iw	Data	Chain Engineering Database File
.iwd	Game	Call of Duty Game Data File
.iwdgt	Web	iWeb Widget File
.iwi	Raster Image	Infinity Ward Texture File
.iws	Developer	IntelliJ IDEA Web Page
.iws	Misc	InstallWatch Scan File
.iwxdata	Data	iWorx Data File
.iwz	Developer	InstallShield Express 2 Project File
.ix	Settings	dtSearch Index File
.ix2	Data	WordPerfect Address Book File
.ixa	Disk Image	Ulead Disc Image format
.ixb	Data	Ulead Disc Image
.ize	Compressed	IZArc Archive
.izz	Video	Isadora Media Control Project
.izzy	Video	Isadora Project