This page provides a list of those file extensions that start with .i. The information given below is a summary and further details can be found by clocking on the summary next to the file extension of interest.

.iBorland C++ intermediary file | GCC pre-processed C file.
.i00WinPhone phonebook | DVD Shrink.
.icASwin project file.
.icfInformation (Model) Configuration file | ICOM (CS-R20) communications file.
.iclIcon Library File.
.icmImage Color Matching profile.
.icoWindows icon file.
.icsCalendar data exchange file | SwiftView command file | IronCAD Scene file | Isochrone save file.
.idMapInfo index file.
.idbMS-Dev intermediate file.
.identifierZone identifier ADS.
.idtExported Windows Installer Database table file.
.idxFoxPro index file | C-tree plus index file.
.ifCRwin project file.
.ifoCD/DVD Information file.
.iiGCC pre-processed C++ file.
.iifQuickBooks import file.
.imgGEM image file | CloneCD image file | CD image file | Erdas Hierarchical Image file | LinkSys firmware image file.
.imhIncredimail email index file.
.immiMindMap mind-map file | IncrediMail e-mail file.
.impeBook import file | Simply Accounting file | Compressed archive | FileMaker Pro data filter | Desktop Dispatcher import file | WINGS GIS export file.
.inGNU Autoconf configuration script.
.indMapInfo index file.
.infInformation file.
.infoDrupal theme information file | Network Install Manager configuration information file | Texinfo formatted document file | ZoomBrowser image catalogue file.
.iniInitialisation file.
.inkMimio presentation | Pantone reference fills file.
.inlInline file.
.insInternet Naming Service file | InstallShield script.
.inxCompiled Script file.
.iprInstallShield Professional project file.
.isdMySql data file.
.ismMySql index file | InstallShield project file.
.isoCD image file.
.issInno Setup Script | InstallShield Silent response file.
.istInstallShield project template file.
.iwpInteractive web physics file | Wang WP file | Generated web page.
.iwzInstallShield Wizard file.

For further information about the file extension please do click on the summary next to the file extension in the list above.

We would like this listing to be complete and comprehensive, but recognised that we may have missed one and that new file types are being used all the time. So if you know of a file type that we have missed that should be listed here then please let us know.