| File extension | Developer/Producer | File description |
|---|
| T file extension | Holt Software | Turing Programming Language Format |
| T$2A file extension | Netopia, Inc., a Motorola Company | Timbuktu Pro |
| T$AB file extension | Netopia, Inc., a Motorola Company | Timbuktu Pro Address Book |
| T$M file extension | Grisoft | AVG Internet Security Temporary Format |
| T00 file extension | HRB Digital LLC. | TaxCut Federal Data |
| T01 file extension | N/A | TAXWIZ Deluxe Tax Format |
| T02 file extension | N/A | TaxCut 2002 Tax Return Format |
| T03 file extension | N/A | TaxCut 2003 Tax Return Format |
| T04 file extension | N/A | TaxCut 2004 Tax Return Format |
| T05 file extension | H&R Block | TaxCut 2005 Tax Return Format |
| T06 file extension | H&R Block | TaxCut 2006 Tax Return Format |
| T07 file extension | H&R Block | TaxCut 2007 Tax Return Format |
| T08 file extension | H&R Block | TaxCut 2008 Tax Return Format |
| T09 file extension | H&R Block | At Home 2009 Tax Return Format |
| T1 file extension | N/A | Male MRI Image Format |
| T10 file extension | H&R Block | At Home 2010 Tax Return Format |
| T11 file extension | H&R Block | At Home 2011 Tax Return Format |
| T12 file extension | H&R Block | H&R Block At Home 2012 Tax Return Format |
| T13 file extension | N/A | H&R Block Tax Software Tax Return |
| T16 file extension | MartinDiehl | DAMASK |
| T2 file extension | Lightroom Education | Textease 2000 Format |
| T2B file extension | Bookeen | CyBook Thumbnail Image Format |
| T2D file extension | Oracle Corporation | Technology Transfer Database |
| T2K file extension | Basement.nl | Teach2000 Document Format |
| T2KS file extension | Basement.nl | Teach2000 Exam Results Format |
| T2KT file extension | Basement.nl | Teach2000 Exam Format |
| T2S file extension | EPA | Tier2 |
| T2T file extension | SourceForge.net | Txt2tags Text Document |
| T3 file extension | Michael J. Roberts | TADS 3 Game |
| T3001 file extension | TARGET 3001! | TARGET 3001! Circuit Design Project Format |
| T32 file extension | PowerQuest | Drive Image 5 |
| T3A file extension | Electric Rain, Inc. | Swift 3D Animation Preset |
| T3D file extension | Epic Games | Epic Unreal Engine 3D Object Format |
| T3V file extension | Michael J. Roberts | TADS 3 Saved Position |
| T3X file extension | N/A | TYPO3 Compressed Extension |
| T4 file extension | TerrAlign | TerrAlign Alignment Configuration |
| T44 file extension | dataBased Intelligence, Inc. | DBASE IV Temporary |
| T49 file extension | N/A | HP48/HP49 Specific |
| T64 file extension | N/A | Commodore 64 Emulator Tape Format |
| T65 file extension | Adobe Systems Incorporated | Adobe PageMaker Template |
| T80 file extension | Chempute Software | TANK - API 650/653 Output Document |
| TA1 file extension | 2nd Story Software | TaxACT 2001 Tax Form |
| TA9 file extension | 2nd Story Software | TaxACT Tax Document |
| TAAC file extension | Sun Microsystems | Sun TAAC Bitmap Image Format |
| TAB file extension | N/A | TAB Separated Format |
| TABULA-BUTTONS file extension | Softline | Tabula Button Library |
| TABULA-DOC file extension | Softline | Tabula Document |
| TABULA-DOCSTYLE file extension | Softline | Tabula Document Settings |
| TAC file extension | ActiCalc | ActiCalc Data Format |
| TAD file extension | Cavedog Entertainment | Total Annihilation Demo Saved Game Data |
| TAF file extension | Campbell Wild | ADRIFT Text Adventure Format |
| TAG file extension | N/A | DataFlex Query Tag Name Format |
| TAH file extension | Micro Focus International plc | Turbo Assembler Help |
| TAK file extension | MAGIX | Music Maker Take Format |
| TAL file extension | Rainer Goebel | BrainVoyager QX Talairach Coordinate |
| TAM file extension | TameDOS | Tame Program Settings |
| TAN file extension | Amazon.com, Inc. | Amazon Kindle |
| TAO file extension | N/A | Track At Once CD/DVD Image |
| TAP file extension | N/A | Commodore 64 Cassette Tape Image |
| TAR file extension | Jean-loup Gailly | Unix Standard Archive Format, Tape Archive |
| TAR-GZ file extension | N/A | Gzip Compressed TAR Archive |
| TAR-LZMA file extension | N/A | TAR Archive |
| TAR-Z file extension | N/A | TAR Compressed Archive |
| TARGZ file extension | The GNU Project | Old Version Gzip Compressed TAR Archive |
| TARGZ2 file extension | N/A | Misnamed BZ2 Tarball |
| TARLZMA file extension | N/A | LZMA Compressed Tarball |
| TARXZ file extension | Tukaani | XZ Compressed TAR Archive Format |
| TARZ file extension | N/A | Tar.Z Compressed Archive |
| TARAA file extension | N/A | Linux TAR Split Archive |
| TARDIST file extension | SGI | Tardist Compressed Archive |
| TARGA file extension | N/A | Truevision TarGA Bitmap Image |
| TARGETS file extension | Microsoft | MSBuild Targets Format |
| TAS file extension | Campbell Wild | ADRIFT Text Adventure Save |
| TAT file extension | Esri | ESRI Geographic Text Attribute Table |
| TAX file extension | N/A | TurboTax Tax Return Format |
| TAX08 file extension | Intuit | TurboTax 2008 Tax Return Format |
| TAX09 file extension | Intuit | TurboTax 2009 Tax Return Format |
| TAX10 file extension | Intuit | TurboTax 2010 Tax Return Format |
| TAX11 file extension | Intuit | TurboTax 2011 Tax Return Format |
| TAX12 file extension | Intuit | TurboTax 2012 Tax Return Format |
| TAX13 file extension | Intuit Inc. | TurboTax Tax Return |
| TAX2008 file extension | Intuit | TurboTax 2008 Tax Return Format |
| TAX2009 file extension | Intuit | TurboTax 2009 Tax Return Format |
| TAX2010 file extension | Intuit | TurboTax 2010 Tax Return Format |
| TAX2011 file extension | Intuit | TurboTax 2011 Tax Return Format |
| TAX2012 file extension | Intuit | TurboTax 2012 Tax Return Format |
| TAX2013 file extension | Intuit Inc. | TurboTax Tax Return |
| TAXFORM file extension | Intuit Inc. | QuickBooks Draft |
| TAZ file extension | N/A | TAR Compressed Archive |
| TB file extension | Tabbery | Tabbery Tab Format |
| TB0 file extension | Adobe Systems | Adobe Photoshop Format Browser Thumbnail Cache Format |
| TB1 file extension | N/A | Borland Turbo C Font |
| TB2 file extension | Embarcadero Technologies, Inc. | Borland Turbo C Font |
| TB3 file extension | Intel Corporation | Intel VTune Performance Monitor Sampling Data |
| TB5 file extension | Intel Corporation | Intel VTune Performance Monitor Sampling Data |
| TBA file extension | Inmagic, Inc. | DB/Text Database Primary Textbase Definition |
| TBB file extension | Microsoft Corporation | Microsoft Office Toolbar Button |
| TBC file extension | Sony Corporation | Formula 1 Car Race 2001 Season01 Vehicles |
| TBD file extension | DATAIR Employee Benefit Systems, Inc. | Document System Document Source Code |
| TBE file extension | N/A | TMPGEnc List |
| TBF file extension | Trellian | Trellian Button Factory |
| TBG file extension | BioWare | Infinity Engine Game |
| TBI file extension | Electronic Arts, Inc. | FIFA 2001 Data Cmn Be |
| TBK file extension | N/A | ToolBooK Format |
| TBL file extension | Blizzard Entertainment | Table Format |
| TBM file extension | Nabi Studios | Toribash Mod Format |
| TBN file extension | XBMC | XBMC Folder Thumnail Format |
| TBP file extension | Tekla | Tekla BIMsight Project |
| TBR file extension | JustSystems Corp. | SoftQuad XMetaL Configuration |
| TBS file extension | TuneUp Corporation | TuneUp Style Boot Screen Format |
| TBT file extension | Netopia, Inc., a Motorola Company | Timbuktu Pro Remote Control Software |
| TBV file extension | Brain Innovation B.V. | Turbo-BrainVoyager Data |
| TBX file extension | SDL plc. | Trados Glossary |
| TBZ file extension | N/A | Bzip2 Compressed TAR Archive Format |
| TBZ2 file extension | N/A | BZIP/TAR Compressed Archive Format |
| TC file extension | N/A | TrueCrypt Disk Volume Format |
| TC2 file extension | IMSI | TurboCAD 2D Drawing Format |
| TC3 file extension | IMSI | TurboCAD 2D/3D Mac Drawing Format |
| TCA file extension | Iota Software Ltd. | The Complete Animator Animation |
| TCB file extension | FAL Labs | Tokyo Cabinet TBZIP |
| TCC file extension | ProSystems | TimeCalc Classic Proprietary Formatted Data File Format |
| TCD file extension | Technobox | Technobox CAD Drawing |
| TCE file extension | N/A | TLE File Format |
| TCF file extension | Turbosoft Pty Ltd. | TTWin 3 Certificate Licensing |
| TCH file extension | Micro Focus International plc | Borland C++ Help |
| TCL file extension | N/A | TCL Script Source Code |
| TCLOG file extension | SmartBear Software | TestComplete Log |
| TCM file extension | IMSI | TurboCAD Mac Drawing Format |
| TCP file extension | Tally Solutions | Tally.ERP Compiled Program Format |
| TCR file extension | Psion Teklogix | Psion Series 3 EBook Format |
| TCS file extension | Lennert Ploeger | TreeComp Snapshot |
| TCSH file extension | The Open Group | Unix Shell Script |
| TCT file extension | IMSI/Design | TurboCAD Template Format |
| TCW file extension | IMSI/Design | TurboCAD For Windows Drawing Format |
| TCX file extension | IMSI/Design | TurboCAD Text Drawing Format |
| TCZ file extension | Linux | Tiny Core Linux Script Format |
| TCZL file extension | N/A | Tiny Core Linux Xlib |
| TD file extension | Thunder Network Technologies | Thunder Incomplete Download Format |
| TD0 file extension | N/A | Teledisk Disk Image |
| TD2 file extension | Borland Software Corporation | Borland Turbo Debugger For Win32 Configuration |
| TD4 file extension | Chris Sawyer Productions | RollerCoaster Tycoon Track Design Format |
| TD6 file extension | Chris Sawyer Productions | RollerCoaster Tycoon Track Design Format |
| TDA file extension | Palm | Palm To Do Format |
| TDA3MT file extension | DivX | DivX Author Template Format |
| TDAT file extension | Freescale Semiconductor, Inc. | Codewarrior Mac |
| TDB file extension | eBay | EBay Turbo Lister Format |
| TDC file extension | balesio AG | ALLCapture Project |
| TDDD file extension | Impulse | 3D Data Description Format |
| TDE file extension | Tableau Software | Tableau Data Extract Format |
| TDF file extension | Project Pluto | Project Pluto Guide Text Definition Format |
| TDI file extension | N/A | Explore (TDI) & Maya Image File (IFF Format) |
| TDIM file extension | N/A | Digital F/X Image Format |
| TDK file extension | Borland Software Corporation | Borland Turbo Debugger Keystroke Recording |
| TDL file extension | N/A | MathType Translator Definition Language |
| TDLOG file extension | Microsoft Corporation | Microsoft Visual Studio |
| TDM file extension | National Instruments | LabVIEW Binary Measurement Format |
| TDMB file extension | Trimble Navigation Ltd. | Trimble Outdoors Navigator Map Bundle |
| TDMS file extension | National Instruments Corporation | LabVIEW TDMS |
| TDMS_INDEX file extension | National Instruments Corporation | LabVIEW |
| TDOC file extension | Softline | Tabula Document |
| TDP file extension | Serif Europe Ltd. | Sherif DrawPlus Thumbnail |
| TDR file extension | Top Software | Top Draw Vector Graphic |
| TDS file extension | Borland | Borland Turbo Debugger Symbol Table Format |
| TDT file extension | Daylight Chemical Information Systems | THOR Data Tree Format |
| TDT2 file extension | Panasonic Corporation | Panasonic HD Video Camera Movie |
| TDV file extension | National Instruments Corporation | DIAdem VIEW Module Setup Information |
| TDX file extension | D-TEG | D-TEG CCTV Video Information Format |
| TDY file extension | TODAY Systems, Inc. | TODAY BuildProfessional Application |
| TDZ file extension | Drobo | Drobo Firmware Update Format |
| TE file extension | Lightbox Education | Textease CT Database Format |
| TE3 file extension | WinTrack | Wintrack Object Format |
| TEA file extension | N/A | Tea Source |
| TEACHER file extension | SMART Technologies | SMART Response Teacher Database Format |
| TEC file extension | SIL International | Tecplot ASCII Data Format |
| TED file extension | Petroglyph Games | Star Wars Empire At War Alamo Game Engine Map Format |
| TEE file extension | N/A | TeeChart Office Graphics |
| TEF file extension | N/A | TablEdit Tablature Format |
| TEI file extension | Image Systems | TrackEye Image Sequence |
| TEM file extension | Micro Focus International plc | Borland C++ Turbo Editor Macro Language Script |
| TEMP file extension | N/A | Temporary Format |
| TEMPLATE file extension | Apple | Template Format |
| TEMPORARYITEMS file extension | Apple, Inc. | Mac OS X Temporary |
| TEN file extension | Steema Software | TeeChart For .NET Chart Control Template |
| TEP file extension | SourceForge.net | TopiaryExplorer Project |
| TEQ file extension | SBC | Saia S-Web-Editor PCD |
| TER file extension | Corel Corporation | CorelDRAW CorelFLOW Line Terminatorfile |
| TERM file extension | Apple, Inc. | Apple Mac OS X Terminal |
| TERMINAL file extension | Apple | Apple Mac OS X Terminal Settings Format |
| TERMS file extension | Red Hat, Inc. | Cygwin Demos |
| TERRAIN file extension | Planetside Software | TerraGen Terrain Graphic Data |
| TES file extension | N/A | TECO Macro |
| TESTRUNCONFIG file extension | Microsoft | Microsoft Visual Studio Test Run Configuration Format |
| TESTSETTINGS file extension | Microsoft | Microsoft Visual Studio Format |
| TET file extension | Lightbox Education | Textease Template Format |
| TEW file extension | Grey Dog Software | Wrestling Spirit |
| TEX file extension | N/A | TeX/LaTeX Text Document Format |
| TEX0 file extension | N/A | Nintendo Wii Texture Format |
| TEXI file extension | LaTeX Project Development Team | TEX |
| TEXINFO file extension | N/A | Texinfo Source |
| TEXTCLIPPING file extension | Apple | Mac OS X Text Clipping Format |
| TEXTEXPANDER file extension | SmileOnMyMac, LLC | TextExpander |
| TEXTFACTORY file extension | Bare Bones Software | BBEdit Text Factory |
| TEXTILE file extension | The Eclipse Foundation | Eclipse IDE WikiText Document |
| TEXTMATE_INIT file extension | GNU Project | Unix Shell Script (bash) |
| TEXTS file extension | M.Carson | Ribbons Texts |
| TEXTUREPACK file extension | exDream GmbH | Arena Wars Texture Pack |
| TEXTUTILS file extension | The GNOME Project | Gnome Desktop |
| TF file extension | Autodesk, Inc. | Autodesk Inventor Transcript |
| TF2 file extension | Valve Corporation | Team Fortress 2 Data |
| TFA file extension | treeSoft | Turbo Profiler Area Format |
| TFC file extension | Epic Games | Unreal Engine 3 Texture Cache Format |
| TFD file extension | N/A | Tape Format Requirements Document Format |
| TFF file extension | N/A | IDOLON Tagged |
| TFH file extension | Borland Software Corporation | Turbo Profiler Help |
| TFIL file extension | Blizzard Entertainment | Blizzard Software Update Format |
| TFL file extension | Tific | Tific Client |
| TFM file extension | N/A | Tagged Font Metric Format |
| TFMX file extension | N/A | Final Musicsystem EXtended Amiga Audio Format |
| TFP file extension | Schneider Electric S.A. | ProWORX Nxt Full Page Data |
| TFR file extension | LucasArts | Star Wars Tie Fighter Game Pilot Format |
| TFRD file extension | National Geospatial-Intelligence Agency | Tape Image Format Requirements Document |
| TFS file extension | Borland Software Corporation | Turbo Profiler Statistical Information |
| TFT file extension | FormatBlue Software | Text Formatter Plus Text Information |
| TFW file extension | ESRI | World File For TIFF |
| TFWX file extension | Esri | ArcGIS Approximate Affine Transformation |
| TFX file extension | Dowling Associates, Inc. | Traffix Traffic Analysis Software |
| TG file extension | TuxGuitar | TuxGuitar Format |
| TG4 file extension | Bentley Systems | TG4 Image Format |
| TGA file extension | Avid Technology | Truevision TarGA Bitmap Image |
| TGB file extension | TheGreenBow | IPSec VPN Client VPN Configuration |
| TGC file extension | Planetside Software | Terragen Node Clip |
| TGD file extension | Planetside Software | Terragen World |
| TGF file extension | N/A | Trival Graph Format |
| TGH file extension | Activision | Guitar Hero 3 Tier Settings |
| TGI file extension | Maxis | SimCity 4 |
| TGL file extension | SkyMap Software | SkyMap Pro Target List |
| TGMD file extension | yougrids | ThumbGen Movie Metadata |
| TGMG file extension | Axel Shootingstar | TabGroups Manager For Firefox Exported Group |
| TGML file extension | N/A | Tecumseh Group Markup Language |
| TGO file extension | Planetside Software | Terragen 2 Object |
| TGP file extension | Jo Meder | TGPGuiLib Terragen Plugin |
| TGQ file extension | Electronic Arts, Inc. | Dungeon Keeper 2 Movie Game |
| TGS file extension | N/A | GSTree Phylogenetic Tree Information |
| TGV file extension | Electronic Arts, Inc. | Electronic Arts Video |
| TGW file extension | Planetside Software | TerraGen World |
| TGWORLD file extension | Planetside Software | TerraGen World |
| TGX file extension | Firefly Studios Ltd. | Stronghold |
| TGZ file extension | N/A | Gzip Compressed TAR Archive |
| TH file extension | Therion | Therion Data Format |
| THA file extension | Microsoft | Windows Thai Noise-Words List Format |
| THB file extension | N/A | KinuPix Skin |
| THD file extension | N/A | Dolby TrueHD Audio |
| THE file extension | Microsoft | Microsoft Plus! Pack Desktop Theme |
| THEATER file extension | Apple, Inc. | IMovie Theater Library |
| THEM file extension | N/A | Microsoft Windows Desktop Theme |
| THEME file extension | Microsoft | Windows Desktop Theme Format |
| THEMEPACK file extension | Microsoft | Microsoft Windows 7 Theme Pack Format |
| THEWITCHERSAVE file extension | CD Project | The Witcher Save Game |
| THF file extension | Symantec Corporation | PcAnywhere Thin Host |
| THL file extension | CyberLink Corp. | PowerProducer Background Image Icon |
| THM file extension | N/A | Thumbnail Bitmap Image Format |
| THME file extension | Microsoft Corporation | Microsoft Theme Format |
| THMX file extension | Microsoft | Microsoft Office 2007/2010 Theme Format |
| THN file extension | N/A | Graphics Workshop For Windows Thumbnail |
| THNL file extension | Alchemy Mindworks | Graphics Workshop For Windows Thumbnail |
| THP file extension | N/A | TurboTax Text String Format |
| THR file extension | Parametric Technology Corporation | Pro/ENGINEER |
| THS file extension | Corel Corporation | Corel WordPerfect Thesaurus Dictionary |
| THUMB file extension | JAlbum | JAlbum Thumbnail Format |
| THUMBDATA file extension | Google Inc. | Google Android Thumbnail Database |
| THUMBDATA-IDX3 file extension | Google Inc. | Android Thumbnail Index |
| THUMBDATA3 file extension | Google Inc. | Google Android Thumbnail Database |
| THUMBDATA3--1763508120 file extension | Google Inc. | Android Thumbnail Index |
| THUMBDATA3--1967290299 file extension | Google Inc. | Android Thumbnail Index |
| THUMBDATA3--NUMBER file extension | Google Inc. | Android MediaProvider Thumbnail Database |
| THUMBDATA4 file extension | Google Inc. | Google Android Thumbnail Database |
| THUMBDATA4--1763508120 file extension | Google Inc. | Android Thumbnail Index |
| THUMBDATA4--1967290299 file extension | Google Inc. | Android Thumbnail Index |
| THUMBDATA5 file extension | Google Inc. | Google Android Thumbnail Database |
| THUMBDATA5--1763508120_0 file extension | Google Inc. | Android Thumbnail Index |
| THUMBDATA5--1967290299_0 file extension | Google Inc. | Android Thumbnail Index |
| THUMBSDB file extension | BR Software | PixFiler Thumbnail Database |
| THX file extension | N/A | Amiga THX Tracker Music |
| TI file extension | timber-lang.org | Timber Compiler |
| TI0 file extension | Softline | Tabula Binary Settings And Initialization |
| TI1 file extension | Softline | Tabula Binary Settings And Initialization |
| TI2 file extension | Softline | Tabula Binary Settings And Initialization |
| TIB file extension | Acronis | Acronis TrueImage Backup Disk Image Format |
| TIC file extension | Esri | ArcInfo Coordinates |
| TID file extension | IBM | IBM Voice Type Languages Tasks |
| TIE file extension | Codeweavers | CrossTie Installer Format |
| TIF file extension | N/A | Aldus Tagged Image File Format (TIFF) Bitmap Image |
| TIFF file extension | Adobe Systems | Aldus Tagged Image File Format (TIFF) Bitmap Image |
| TIG file extension | Texas Instruments | Texas Instruments Connect Backup Format |
| TIGER file extension | Crystal Dynamics | Crystal Dynamics Game Data Archive Format |
| TII file extension | Apache Software Foundation | Apache Lucene Term Info Index |
| TIKZ file extension | MathWorks, Inc. | Matlab Tikz Script |
| TIL file extension | N/A | Buttonz & Tilez Texture Image Format |
| TILE file extension | N/A | Eclipse Image |
| TILEMAP file extension | N/A | XML Tilemap Format |
| TILESKINZIP file extension | Stardock Corporation | Elemental Tile Skin |
| TIM file extension | Sierra | The Incredible Machine Level Format |
| TIME file extension | Light of Creativity | LIGHT Format |
| TIN file extension | Bentley Systems, Incorporated | Bentley GEOPAK Environmental Modeling Systems |
| TINF file extension | Microsoft Corporation | Microsoft Theme Info |
| TINY file extension | The GNOME Project | Gnome Desktop |
| TINYID file extension | TinyCo | Tiny Village |
| TIP file extension | TuneUp Corporation | TuneUp Utilities Icon Package Format |
| TIPROGRAM file extension | Texas Instruments | TI-Basic Source Code Format |
| TIR file extension | CipSoft GmbH | Tibia RePlay Tibia Movie |
| TIS file extension | Acronis | True Image Script |
| TIT file extension | Microsoft Corporation | Train Simulator Track Interactive Table |
| TIVO file extension | TiVo | TiVo Video Format |
| TIW file extension | Bentley Systems, Incorporated | Bentley InRoads |
| TIX file extension | DivX | DivX Video Download Activation Format |
| TJA file extension | Taikojiro | Taikojiro Song Map Format |
| TJC file extension | Taikojiro | Taikojiro Song Map Sequence Format |
| TJF file extension | IBM | IBM Rational ClearCase Transaction |
| TJP file extension | TaskJuggler | TaskJuggler Project Format |
| TK file extension | N/A | Tk Language Script |
| TK1 file extension | N/A | Wintec Tools GPS Log |
| TK2 file extension | Roxio | Roxio/Take Two Backup |
| TK3 file extension | Night Kitchen | TK3 Multimedia EBook Format |
| TKB file extension | Elk River Systems | TicketBench Data |
| TKFL file extension | N/A | TKLinks Saver Favorite Links Format |
| TKL file extension | N/A | Takeoff Live PDF Working Data |
| TKM file extension | Andrew Wilson | TkMOO-light |
| TKN file extension | Shoptalk Systems | Liberty BASIC Application Distribution |
| TKO file extension | N/A | Win32/Oficla Malware Format |
| TKP file extension | MicroImages, Inc. | MicroImages SML Script Standalone Application |
| TKR file extension | Microsoft | ESignal Ticker Format |
| TKS file extension | Native Instruments, Inc. | Traktor Pro MIDI Map |
| TKW file extension | Universal Technical Systems, Inc. | TK Solver |
| TL file extension | N/A | OpenTL Open Track List |
| TL5 file extension | Tom Snyder Productions | Timeliner 5 Format |
| TLA file extension | TuneUp Corporation | TuneUp Logo Animations |
| TLB file extension | Microsoft | OLE Type Library |
| TLBACKUP file extension | TORDEX | True Launch Bar Backup Settings |
| TLC file extension | Laughingbird Software | The Logo Creator Format |
| TLD file extension | N/A | Tag Library Descriptor Format |
| TLE file extension | N/A | TLE File Format |
| TLG file extension | Intuit | QuickBooks Transaction Log Format |
| TLH file extension | Microsoft | Typelib Generated C/C++ Header Format |
| TLI file extension | N/A | Typelib Generated C/C++ Inline Format |
| TLIC file extension | N/A | Trust Lincense |
| TLK file extension | BioWare | BioWare Talk Table Format |
| TLL file extension | LG Electronics | LG TV Link-Loader Configuration Format |
| TLM file extension | Timeline Maker Software | Timeline Maker Timeline |
| TLO file extension | IBM | SPSS User Table Lookup Format |
| TLP file extension | David Auber and Patrick Mary | Tulip Software Graph Format |
| TLQ file extension | Nova Development Corporation | Art Explosion T-Shirt Factory Deluxe |
| TLR file extension | Tableau Software | Tableau Offline License Registration |
| TLS file extension | TuneUp Corporation | TuneUp Utilities Logon Screen Format |
| TLT file extension | Web.com | Trellix Web Design |
| TLV file extension | Magestic Systems, Inc. | TruLASER View Geometry Data |
| TLX file extension | N/A | Wintertree Dictionary Format |
| TLY file extension | Adobe Systems Incorporated | Adobe Photoshop Elements Backup Catalog |
| TLZ file extension | Lzip | Unix TLZ Compression Engine Format |
| TLZMA file extension | N/A | LZMA Compressed Tar Archive |
| TM file extension | GNU | TeXmacs Document |
| TM1 file extension | David Berman Developments Inc. | TimeWise |
| TM2 file extension | N/A | Playstation 2 TIM2 Bitmap Format |
| TM8 file extension | Theta Music Composer | Theta Music Composer 1.x Audio Format |
| TMB file extension | Netopia | Timbuktu Pro Connection Document Format |
| TMBUNDLE file extension | MacroMates | TextMate Bundle Format |
| TMC file extension | Theta Music Composer | Theta Music Composer 1.x Audio Format |
| TMD file extension | SoftMaker Software | TextMaker Document Format |
| TMDB file extension | Interfathom, LLC. | TaskMerlin Database |
| TME file extension | DAZ Productions | Bryce Animation Time Curve Format |
| TMF file extension | Corel Corporation | Corel WordPerfect Tagged Font Metric |
| TMH file extension | Microsoft Corporation | Trace Message Header |
| TMI file extension | Thin Multimedia, Inc. | Thin Client Media-3 Encoded Video |
| TMK file extension | Embarcadero Technologies, Inc. | Turbo Pascal Tour |
| TML file extension | Association of Shareware Professionals, Inc. | PADGen |
| TMLANGUAGE file extension | MacroMates | TextMate Grammar Format |
| TMM file extension | LexisNexis | TimeMap Metadata |
| TMO file extension | 3D Custom Girl | 3D Custom Girl Animation Format |
| TMP file extension | N/A | Temporary Format |
| TMPL file extension | Xfire | Xfire User Interface Template Format |
| TMPREFERENCES file extension | MacroMates Ltd. | TextMate Preference |
| TMPROJ file extension | MacroMates | TextMate Project Format |
| TMPROJECT file extension | MacroMates | TextMate Project |
| TMPRTF file extension | LexisNexis | TimeMap Portable |
| TMQ file extension | Bob Beveridge | TestMaster |
| TMR file extension | Apimac Intuitive Software | Apimac Timer Settings Format |
| TMS file extension | Telemate | Timeless Time & Expense Multi-user Settings Format |
| TMTHEME file extension | MacroMates | TextMate Theme Format |
| TMV file extension | SoftMaker Software | TextMaker Document Template Format |
| TMVT file extension | LexisNexis | TimeMap Template |
| TMW file extension | SDL | TRADOS Translators Workbench Format |
| TMX file extension | N/A | Translation Memory EXchange Format |
| TMZ file extension | Medigraph Inc. | Medigraph Compressed Database |
| TMZIP file extension | Theme Manager | Theme Manager Zip Format |
| TN file extension | LG | LG Encoded JPG Image Format |
| TN1 file extension | Atari | Tiny Bitmap Image Format |
