55 File Extensions starting with I
| .I17 | Pixel Power Collage Image |
| .I18 | Pixel Power Collage Image |
| .IB7 | Pixel Power Collage Image |
| .IBB | IBB Disk Image |
| .IBP | IBP Disk Image |
| .IBQ | IsoBuster Disk Image |
| .ICA | IOCA Image |
| .ICB | Image Capture Board Image |
| .ICL | Icon Library |
| .ICN | RIPTerm Image |
| .ICNS | Macintosh Icon File |
| .ICO | Windows Icon File |
| .ICO | Sun Icon/Cursor |
| .ICON | Sun Icon/Cursor |
| .IDC | Core IDC Image |
| .IF9 | Pixel Power Collage Image |
| .IFF | Explore (TDI) & Maya Image |
| .IFF | Sun TAAC Image |
| .IFF | Amiga IFF Image |
| .IFO | DVD Information File |
| .IIM | Inshape Image |
| .IIMG | Interleaf Image |
| .ILBM | Deluxe Paint, Electronic Arts Image |
| .IM | AIM Grey Scale Image |
| .IM5 | IM5 (Visilog) Image |
| .IMA | AIM Grey Scale Image |
| .IMG | ADEX Image |
| .IMG | Digital Research (GEM Paint) Image |
| .IMG | Imaging Technology Image |
| .IMG | Img Software Set Image |
| .IMG | Microtek Eyestar Image |
| .IMG | Planetary Data System Image |
| .IMG | Radiance Image |
| .IMG | Sharp GPB Image |
| .IMG | Starbase Image |
| .IMG | Vivid Ray-Tracer Image |
| .IMG | Autocad CAD-Camera Image |
| .IMG | Datacopy Image |
| .IMG | Vicar Image |
| .IMG | Disk Image File |
| .IMT | IMNET Image |
| .INFO | Amiga icon |
| .INI | Initialization File |
| .IOCA | IOCA Image |
| .IPG | Mindjongg Format Image |
| .IPH | InterPaint (Hires) Image |
| .IPT | InterPaint (Multicolor) Image |
| .IRIS | Iris graphic Image |
| .IRIS | Silicon Graphics RGB Image |
| .ISH | Image Speeder Image |
| .ISM | Image System (Multicolor) Image |
| .ISO | ISO 9660 Disk Image |
| .ISS | ISS Image |
| .ITG | Intergraph Format Image |
| .IVB | Truevision Targa Image |