| Extension |
File Type |
File Description |
| .t | Developer | Turing Source Code File |
| .t$m | Misc | AVG Internet Security Temporary File |
| .t01 | Data | TaxCut 2001 File |
| .t02 | Data | TaxCut 2002 File |
| .t03 | Data | TaxCut 2003 File |
| .t04 | Data | TaxCut 2004 File |
| .t05 | Data | TaxCut 2005 Tax Return |
| .t06 | Data | TaxCut 2006 Tax Return |
| .t07 | Data | TaxCut 2007 Tax Return |
| .t08 | Data | TaxCut 2008 Tax Return |
| .t09 | Data | At Home 2009 Tax Return |
| .t2 | Data | Textease 2000 File |
| .t3001 | CAD | TARGET 3001! Circuit Design Project File |
| .t3d | Settings | TicTacTi Advertisement Definition File |
| .t3d | 3D Image | Unreal Engine 3D Object File |
| .t3x | Plugin | TYPO3 Compressed Extension |
| .t64 | Disk | Commodore 64 Tape Image File |
| .taac | Raster Image | Sun TAAC Image File |
| .tab | Text | Guitar Tablature File |
| .tab | Text | Tab Separated Data File |
| .taf | Game | ADRIFT Text Adventure File |
| .tag | Misc | DataFlex Query Tag |
| .tao | Disk | Track at Once CD/DVD Image |
| .tap | Game | Tap Tap Revenge Tap File |
| .tap | Disk | Commodore 64 Cassette Tape Image |
| .tar | Data | Consolidated Unix File Archive |
| .tar.gz | Compressed | Tarball File |
| .tar.xz | Compressed | XZ Compressed Tar Archive |
| .targets | Developer | MSBuild Targets File |
| .tax | Misc | TurboTax Tax Return |
| .tax2008 | Data | TurboTax 2008 Tax Return |
| .tax2009 | Data | TurboTax 2009 Tax Return |
| .taz | Compressed | Tar Zipped File |
| .tb | Data | Tabbery Tab File |
| .tbk | Backup | FoxPro Memo Backup |
| .tbk | Data | ToolBook File |
| .tbl | Data | StarCraft Information Table |
| .tbm | Game | Toribash Mod File |
| .tbs | Misc | TuneUp Utilities Boot Screen |
| .tbz | Compressed | Bzip Compressed Tar Archive |
| .tbz2 | Compressed | Tar BZip 2 Compressed File |
| .tc | Disk | TrueCrypt Volume |
| .tc2 | CAD | TurboCAD 2D Mac Drawing |
| .tc3 | CAD | TurboCAD 2D/3D Mac Drawing |
| .tcc | Data | TimeCalc Classic Data File |
| .tcc | Developer | C++ Source Code File |
| .tcd | CAD | Technobox CAD Drawing |
| .tcl | Developer | Tcl Script |
| .tcm | CAD | TurboCAD Mac Drawing |
| .tcp | Executable | Tally Compiled Program File |
| .tct | CAD | TurboCAD Drawing Template |
| .tcw | CAD | TurboCAD Drawing File |
| .tcx | Data | Training Center Database File |
| .tcx | CAD | TurboCAD 3D Model Text File |
| .td0 | Audio | Akai Teledisk Sound Library |
| .td0 | Disk | Teledisk Archive |
| .tda | Data | Java Application Thread Dump |
| .tda | Data | Palm To-Do File |
| .tda3mt | Video | DivX Author Template File |
| .tdb | Backup | eBay Turbo Lister Backup File |
| .tddd | 3D Image | 3D Data Description File |
| .tdf | Text | Guide Text Definition File |
| .tdf | Settings | Title Definition Format File |
| .tdf | Text | Xserve Test Definition File |
| .tdl | Data | Tab Delineated Format File |
| .tdl | Misc | MathType Translator Definition Language |
| .tdm | Data | LabVIEW Binary Measurement File |
| .tds | Developer | Turbo Debugger Symbols File |
| .tdt | Data | THOR Data Tree File |
| .tdt | Data | FirstBreak Concrete Test File |
| .te | Data | Textease CT Database File |
| .te3 | Data | WinTrack Object File |
| .teacher | Data | SMART Response Teacher Database File |
| .ted | Game | Tribes 2 Game Data File |
| .ted | Game | Alamo Map File |
| .tef | Data | TablEdit Tablature |
| .temp | Misc | Temporary (Temp) File |
| .testrunconfig | Developer | Visual Studio Test Run Configuration File |
| .testsettings | Developer | Visual Studio Test Settings File |
| .tet | Data | Textease CT Template |
| .tex | Text | LaTeX Source Document |
| .tex | Raster Image | Texture File |
| .text | Text | Plain Text File |
| .textclipping | Misc | Mac OS X Text Clipping File |
| .tfa | Data | TreeSoft CashFlow Analysis Data File |
| .tfd | Data | Tape Format Requirements Document |
| .tfmx | Audio | Final Music System Tracker Module |
| .tfrd | GIS | Tape Image Format Requirements Document |
| .tfw | GIS | World File for TIFF |
| .tg | Compressed | Gzip Compressed Tar Archive |
| .tg4 | Raster Image | Tiled Group 4 Raster Image File |
| .tga | Raster Image | Targa Graphic |
| .tgz | Compressed | Gzipped Tar File |
| .the | Settings | Microsoft Plus! Theme File |
| .theme | Settings | GTK Theme Index File |
| .theme | System | Microsoft Plus! Desktop Theme |
| .themepack | Settings | Windows 7 Theme Pack |
| .thm | Raster Image | Video Thumbnail File |
| .thm | Raster Image | Thumbnail Image File |
| .thm | Executable | Thermwood Macro File |
| .thm | Misc | Sony Ericsson Theme File |
| .thmx | Settings | Office 2007 Theme File |
| .thp | Text | TurboTax Text String |
| .thumb | Raster Image | JAlbum Thumbnail File |
| .thx | Audio | Amiga THX Tracker Music File |
| .tib | Disk | Acronis True Image File |
| .tif | Raster Image | Tagged Image File |
| .tiff | Raster Image | Tagged Image File Format |
| .tim | Game | The Incredible Machine Level |
| .tip | Misc | TuneUp Utilities Icon Package |
| .tiprogram | Developer | TI-Basic Program File |
| .tivo | Video | TiVo Video File |
| .tix | Video | DivX Video Download Activation File |
| .tjp | Raster Image | Tiled JPEG File |
| .tjp | Data | TaskJuggler Project File |
| .tk | Developer | Tk Script |
| .tk3 | Data | TK3 Multimedia eBook |
| .tkfl | Data | TKLinks Saver Favorite Links File |
| .tla | Misc | TuneUp Utilities Startup Logo |
| .tlb | Text | VAX Text Library |
| .tlb | Misc | OLE Type Library |
| .tlc | Vector Image | The Logo Creator File |
| .tlg | Backup | QuickBooks Transaction Log File |
| .tlh | Developer | Typelib Generated C/C++ Header File |
| .tli | Developer | Typelib Generated C/C++ Inline File |
| .tls | Misc | TuneUp Utilities Logon Screen |
| .tlz | Compressed | Tar LZMA Compressed File |
| .tlzma | Compressed | LZMA Compressed Tar Archive |
| .tm | Text | TeXmacs Document |
| .tmb | Misc | Timbuktu Pro Connection Document |
| .tmd | Data | MySQL Temporary Database File |
| .tmd | Text | TextMaker Document |
| .tmp | Backup | Temporary File |
| .tms | Executable | Telemate Script |
| .tmw | Data | Translation Memory Data File |
| .tmx | Text | Translation Memory eXchange File |
| .tn1 | Raster Image | Tiny Low Resolution Image |
| .tn2 | Raster Image | Tiny Medium Resolution Image |
| .tn3 | Raster Image | Tiny High Resolution Image |
| .tnef | Misc | Transport Neutral Encapsulation Format |
| .tny | Raster Image | Atari Tiny Image |
| .toast | Disk | Toast Disc Image |
| .toc | Audio | PSP Audio File |
| .toc | Game | World of Warcraft Add-on Table of Contents File |
| .toc | Misc | Eudora Table of Contents |
| .toc | Disk | Brasero Table of Contents File |
| .tod | Video | JVC Everio Video Capture File |
| .tol | Data | AOL Tool File |
| .topc | Data | TopicCrunch Project File |
| .torrent | Misc | BitTorrent File |
| .tp | Video | Beyond TV Transport Stream File |
| .tp0 | Video | Mascom PVR Video File |
| .tp3 | Page Layout | Harvard Graphics DOS Template File |
| .tpb | Data | GROMACS Binary Input File |
| .tpc | Text | Topic Connection Placeholder |
| .tpd | Video | Cyberlink TOD Video File |
| .tpf | Data | Transit NXT Pack Translation File |
| .tpi | Plugin | EDIUS Plugin File |
| .tpi | Raster Image | TrueVision Bitmap Image |
| .tpl | Misc | Document Template |
| .tpm | Misc | Trusted Platform Module Password File |
| .tpm | Misc | Transformation Parameters Model File |
| .tpr | Video | TMPGEnc Project File |
| .tps | Data | Multi Channel Measurement File |
| .tps | Misc | Clarion TopSpeed Data File |
| .tpu | Developer | Turbo Pascal Unit |
| .tpx | Developer | Turbo Pascal 7 Unit |
| .tr3 | Data | TomeRaider eBook File |
| .tra | Data | WinTrack Railroad Track File |
| .trc | Misc | Oracle Trace File |
| .trd | Data | TrID Definitions Package |
| .trif | Raster Image | Tiled Raster Interchange Format |
| .trk | Data | Garmin Track File |
| .trk | Data | CompeGPS Land Track File |
| .trk | Game | Pacific Fighters Offline Track File |
| .trp | Video | HD Video Transport Stream |
| .trs | Data | WinTrack Railroad Track Text File |
| .trs | Data | Rosetta Stone Language Data |
| .truck | 3D Image | Rigs of Rods Truck Definition File |
| .trx | Developer | Visual Studio Test Results File |
| .trx | Data | Firmware Image File |
| .trx | Data | WebAuthorize Batch File |
| .trx | Settings | PASSOLO Translation List File |
| .ts | Data | Nokia Qt Translation Source File |
| .ts | Video | Video Transport Stream File |
| .tsk | Settings | Pocket PC Skin |
| .tsm | Settings | TwinCAT System Manager Configuration File |
| .tsp | Audio | TrueSpeech Audio File |
| .tst | Settings | TagScanner Text Transform Script |
| .tst | Data | TestPoint Test File |
| .tstream | Misc | SwarmPlayer Streaming Torrent |
| .tsv | Data | Tab Separated Values File |
| .tsz | Settings | Trillian Skin File |
| .tt | Developer | Visual Studio Text Template |
| .ttc | Font | TrueType Font Collection |
| .ttf | Font | TrueType Font |
| .ttk | Data | Catalyst Translation Toolkit |
| .ttx | Misc | Trados TagEditor File |
| .tu | Developer | Turing Source File |
| .tub | Misc | Paint Shop Pro Picture Tube |
| .tur | Developer | Turing Program Source File |
| .tvj | Text | TrueView Job Ticket |
| .tvl | Misc | TurboTax File |
| .tvpi | Web | TitanTV Television Listing File |
| .tvs | Video | TeamViewer Video Session File |
| .tvvi | Web | TitanTV Television Listing File |
| .twc | Settings | TTWin Configuration File |
| .twt | Game | Carmageddon 2 Data File |
| .txa | Data | Midas ViewPoint Text Array List |
| .txd | Data | Game Texture Dictionary |
| .txf | Data | Transit XV Pack Translation File |
| .txf | Data | Tax Exchange Format |
| .txn | Data | MySpaceIM Conversation Log File |
| .txt | Text | Plain Text File |
| .txw | Audio | Yamaha TX16W Audio File |
| .txz | Compressed | XZ Compressed Tar Archive |
| .typeit4me | Settings | TypeIt4Me Clippings File |
| .tz | Compressed | Zipped Tar Archive |
| .tzx | Disk | ZX Spectrum Tape Image File |
