| .T3D | Epic Games | 3D-kuvatiedostot | Unreal Engine 3D Object File | Adobe Flash Player | Adobe Systems Incorporated |
| .TAL | Adobe Systems Incorporated | Tekstitiedostot | Adobe TypeAlign Text Illustration File | Adobe TypeAlign | Adobe Systems Incorporated |
| .TBL | Blizzard Entertainment Inc. | Datatiedostot | StarCraft Information Table | Adobe PageMaker | Adobe Systems Incorporated |
| .TBR | Adobe Systems Incorporated | Asetustiedostot | Adobe Photoshop Custom Toolbar Preset | Adobe Photoshop | Adobe Systems Incorporated |
| .TCL | Open Source | Sovelluskehittäjän tiedostot | Tcl Script | ExtendScript Toolkit (ESTK) | Adobe Systems Incorporated |
| .TGA | Avid Technology | Rasterikuvatiedostot | Targa Graphic | Adobe Illustrator CC | Adobe Systems Incorporated |
| .THM | Sony | Harvinaiset Tiedostot | Sony Ericsson Mobile Phone Theme File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .TIF | XnSoft | Rasterikuvatiedostot | Tagged Image File Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .TIFF | XnSoft | Rasterikuvatiedostot | Tagged Image File Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .TIM | Sierra Entertainment | Pelitiedostot | The Incredible Machine Level | Adobe Illustrator CC | Adobe Systems Incorporated |
| .TOD | JVCKenwood Group | Videotiedostot | JVC Everio Video Capture File | Adobe Flash Player | Adobe Systems Incorporated |
| .TPL | Unknown Developer | Tekstitiedostot | Document Template | Adobe Photoshop | Adobe Systems Incorporated |
| .TTY | Adobe Systems Incorporated | Datatiedostot | Adobe Dreamweaver Data | Adobe Dreamweaver | Adobe Systems Incorporated |
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