| .ICB | Avid Technology | Rasterafbeeldingen | Targa ICB Bitmap Image | Adobe Illustrator CC | Adobe Systems Incorporated |
| .ICC | Corel | Instellingsbestanden | International Color Consortium Profile File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ICM | Adobe Systems Incorporated | Instellingsbestanden | Image Color Matching Profile | Adobe Photoshop | Adobe Systems Incorporated |
| .ICN | Microsoft Corporation | Rasterafbeeldingen | Windows Icon File | Adobe Photoshop | Adobe Systems Incorporated |
| .IDD | Adobe Systems Incorporated | Pagina-indelingsbestand | Adobe InDesign For Mac Document | Adobe InDesign | Adobe Systems Incorporated |
| .IDEA | Adobe Systems Incorporated | Vectorafbeeldingen | Adobe Ideas Document | Adobe Illustrator CC | Adobe Systems Incorporated |
| .IDLK | Adobe Systems Incorporated | Allerlei bestanden | Adobe InDesign Lock File | Adobe InDesign | Adobe Systems Incorporated |
| .IDML | Adobe Systems Incorporated | Pagina-indelingsbestand | Adobe InDesign Markup Language File | Adobe InDesign | Adobe Systems Incorporated |
| .IFC | buildingSMART | 3D-bestanden | Industry Foundation Classes File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .IFF | Electronic Arts | Audiobestanden | Interchange File Format | Adobe Audition | Adobe Systems Incorporated |
| .IGN | Adobe Systems Incorporated | Gegevensbestanden | RoboHelp Ignore List File | Adobe RoboHelp | Adobe Systems Incorporated |
| .IMP | Lotus Software | Werkbladbestanden | Improv Spreadsheet File | Adobe Audition | Adobe Systems Incorporated |
| .IMS | CursorArts Company | Gegevensbestanden | IconForge Create Executable Library Data | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .INC | Microsoft Corporation | Ontwikkelaarsbestanden | Include File | Adobe Dreamweaver | Adobe Systems Incorporated |
| .INCD | Adobe Systems Incorporated | Pagina-indelingsbestand | InCopy Document | Adobe InDesign | Adobe Systems Incorporated |
| .INCT | Adobe Systems Incorporated | Pagina-indelingsbestand | InCopy Template | Adobe InCopy | Adobe Systems Incorporated |
| .INCX | Adobe Systems Incorporated | Pagina-indelingsbestand | InCopy CS3 Interchange File | Adobe InDesign | Adobe Systems Incorporated |
| .IND | Adobe Systems Incorporated | Pagina-indelingsbestand | Adobe InDesign Document | Adobe InDesign | Adobe Systems Incorporated |
| .INDD | Adobe Systems Incorporated | Pagina-indelingsbestand | Adobe InDesign Document | Adobe InDesign | Adobe Systems Incorporated |
| .IRS | Adobe Systems Incorporated | Instellingsbestanden | Adobe Save For Web Settings | Adobe Illustrator CC | Adobe Systems Incorporated |
| .ISA | Adobe Systems Incorporated | Ontwikkelaarsbestanden | Adobe Photoshop ImageReady Action Data | Adobe Photoshop | Adobe Systems Incorporated |
| .IST | Flexera Software | Ontwikkelaarsbestanden | InstallShield Project Template File | ImageStyler | Adobe Systems Incorporated |
| .IX | Corel | Tekstbestanden | Corel WordPerfect Office Template File | Adobe FrameMaker | Adobe Systems Incorporated |
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