| .T3D | Epic Games | 3D-billedfiler | Unreal Engine 3D Object File | Adobe Flash Player | Adobe Systems Incorporated |
| .TAL | Adobe Systems Incorporated | Tekstfiler | Adobe TypeAlign Text Illustration File | Adobe TypeAlign | Adobe Systems Incorporated |
| .TBL | Blizzard Entertainment Inc. | Datafiler | StarCraft Information Table | Adobe PageMaker | Adobe Systems Incorporated |
| .TBR | Adobe Systems Incorporated | Indstillingsfiler | Adobe Photoshop Custom Toolbar Preset | Adobe Photoshop | Adobe Systems Incorporated |
| .TCL | Open Source | Udviklerfiler | Tcl Script | ExtendScript Toolkit (ESTK) | Adobe Systems Incorporated |
| .TGA | Avid Technology | Rasterbilledfiler | Targa Graphic | Adobe Illustrator CC | Adobe Systems Incorporated |
| .THM | Sony | Ikke Almindelige Filer | Sony Ericsson Mobile Phone Theme File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .TIF | XnSoft | Rasterbilledfiler | Tagged Image File Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .TIFF | XnSoft | Rasterbilledfiler | Tagged Image File Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .TIM | Sierra Entertainment | Spilfiler | The Incredible Machine Level | Adobe Illustrator CC | Adobe Systems Incorporated |
| .TOD | JVCKenwood Group | Videofiler | JVC Everio Video Capture File | Adobe Flash Player | Adobe Systems Incorporated |
| .TPL | Unknown Developer | Tekstfiler | Document Template | Adobe Photoshop | Adobe Systems Incorporated |
| .TTY | Adobe Systems Incorporated | Datafiler | Adobe Dreamweaver Data | Adobe Dreamweaver | Adobe Systems Incorporated |
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