List of All the File Extensions Formats and Types Starting With the Letter T
| File Extension | Description |
| .TDL | MathType translator definition language Tab Delineated files format Train Depot Track designer |
| .THM | Sony Ericsson mobile phone theme Thumbnail bitmap image Messenger Plus! skin resource MS Clipart Gallery database OpenOffice.org configuration Serif DrawPlus theme Thermwood Mastercam macro Video Thumbnail |
| .TIF | Aldus Tagged Image File Format (TIFF) bitmap image BigTIFF image Digital Raster Graphic image GeoTiff format |
| .TMP | Temporary AZZ Cardfile RTF data AZZ Cardfile text data IMail Server web messaging Nero WaveEditor peak Norton AntiVirus backed up SafeDisc format SWAT temperature input |
| .TORRENT | Bit torrent archives |
| .TPL | Template Adobe Photoshop Tool preset ArchiCAD project template BestAddress HTML Editor template PHP template files format |
| .TXT | Simple text Ascii text parameter description Atari Jaguar binary image of program text segment DisplayWrite document EasyPlot saved data ENVI statistic report Microsoft Linker input MilkShape 3D ASCII Ocean Data View data OpenOffice.org encoded text RTTTL / Nokring mobile ring-tone format StarWriter for DOS document Steinberg LM-4 bank Subtitle T602 document WAsP site locations Wireshark traffic log |