| .T1 | XnSoft | Fichiers Raster Image | Male MRI Image Format | XnView MP | XnSoft |
| .TAAC | Sun Microsystems | Fichiers Raster Image | Sun TAAC Image | XnView MP | XnSoft |
| .TBN | Open Source | Fichiers Raster Image | Kodi Thumbnail Image | Kodi | Open Source |
| .TDP | Serif | Fichiers Raster Image | Sherif DrawPlus Thumbnail File | Serif WebPlus | Serif |
| .TEX | Open Source | Fichiers Raster Image | LaTeX Source Document | gVim | Open Source |
| .TG4 | Bentley Systems | Fichiers Raster Image | Tiled Group 4 Raster Image File | MicroStation | Bentley Systems |
| .TGA | Avid Technology | Fichiers Raster Image | Targa Graphic | Adobe Illustrator CC | Adobe Systems Incorporated |
| .THM | Sony | Fichiers Raster Image | Sony Ericsson Mobile Phone Theme File | Sony Ericsson Theme Creator | Sony Mobile Communications |
| .THUMB | Jalbum AB | Fichiers Raster Image | JAlbum Thumbnail File | JAlbum | Jalbum AB |
| .TIF | XnSoft | Fichiers Raster Image | Tagged Image File Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .TIFF | XnSoft | Fichiers Raster Image | Tagged Image File Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .TILE | XnSoft | Fichiers Raster Image | Eclipse Image | Unknown Software | Unknown Developer |
| .TIM | Sierra Entertainment | Fichiers Raster Image | The Incredible Machine Level | The Incredible Machine | Sierra Entertainment |
| .TN1 | Atari Corporation | Fichiers Raster Image | Tiny Low Resolution Image | Graphics Converter Pro | Newera Software Technology, Inc. |
| .TN2 | Atari Corporation | Fichiers Raster Image | Tiny Medium Resolution Image | XnView MP | XnSoft |
| .TN3 | Atari Corporation | Fichiers Raster Image | Tiny High Resolution Image | XnView MP | XnSoft |
| .TNY | Atari Corporation | Fichiers Raster Image | Atari Tiny Image | Graphics Converter Pro | Newera Software Technology, Inc. |
| .TPF | IBM | Fichiers Raster Image | SPSS Text Wizard Document | IBM SPSS | IBM |
| .TPI | Thomson Reuters Corporation | Fichiers Raster Image | EDIUS Plugin File | Thomson EDIUS | Grass Valley |
| .TPS | TiePie engineering | Fichiers Raster Image | Multi Channel Measurement File | Multi Channel | TiePie engineering |
| .TRIF | Tiling Task Group (TTG) | Fichiers Raster Image | Tiled Raster Interchange Format | Unknown Software | Unknown Developer |
| .TRP | VSO Software | Fichiers Raster Image | MPEG-2 HD Video Transport Stream | CyberLink PowerDVD | CyberLink |
| .TUB | Corel | Fichiers Raster Image | PaintShop Pro Picture Tube | GIMP | The GIMP Development Team |
de 1 
