| Extension | File Type | Files scanned | Contributor |
| T0* | TaxCut Tax Return file | 5 | |
| T3 | TADS 3 Game | 2 | |
| T3D | Swift 3D 3D Graphic | 4 | |
| T64 | Commodore 64 Emulator Tape file | 15 | |
| TAB | MapInfo Table main file | 38 | Rizla99 |
| TAG | TagInfo data | 9 | |
| TAK | TAK lossless compressed audio | 4 | |
| TAP | Jupiter Ace Tape image | 23 | |
| TAP | ZX Spectrum Tape image | 92 | |
| TAP/DAT | Oric Atmos snapshot | 16 | |
| TAR | TAR - Tape ARchive | 6 | |
| TAX | TurboTax return file | 3 | |
| TBA | DB/TextWorks Database Primary Textbase Definition | 7 | |
| TBASICCX | thinBasic Console scripts (obfuscated) | 6 | Eros Olmi |
| TBASICX | thinBasic GUI scripts (obfuscated) | 15 | Eros Olmi |
| TBB | The Bat! Message Base | 9 | |
| TBI | Image for Windows Disk Image | 2 | |
| TBI | The Bat! Message Base Index | 30 | |
| TBK | Asymetrix ToolBook (generic) | 22 | |
| TBK | Asymetrix ToolBook application | 19 | |
| TBM | DB/TextWorks Database Menu Screen | 3 | |
| TBP | The Bat! plugin | 6 | |
| TBS | Chess Tablebase | 165 | |
| TBS | TuneUp Style Boot Screen | 86 | |
| TBV | 3D Ultra Cool data file | 2 | |
| TCR | TCR eBook | 2 | |
| TCW | TurboCAD drawing | 30 | |
| TCX | Garmin Training Center Database XML (V2) | 14 | |
| TD0 | Teledisk Disk compressed image (advanced mode) | 23 | |
| TD0 | Teledisk Disk compressed image (normal mode) | 23 | |
| TDB | SlamDB Database (generic) | 2 | Kevin G. Peel |
| TDB | SlamDB Database v1.0 | 2 | Kevin G. Peel |
| TDF | TinyDisk Meta File | 8 | |
| TER | Black and White 2 Terrain data | 12 | |
| TERRAIN/TER | Terragen terrain | 2 | |
| TEX | Corel 10 Texture | 341 | Alex Paven |
| TEX | Croteam texture file | 8 | |
| TEX | Nascar game texture | 4 | |
| TEXI/TEXINFO | Texinfo source | 26 | |
| TF | Follin Player II Music | 13 | |
| TFM | FormTool Gold form | 4 | |
| TFM | Transform compressed | 3 | |
| TGA | Targa bitmap (New TGA Format) | 585 | |
| TGA | Targa bitmap (Original TGA Format - No Image ID) | 333 | |
| TGA | Targa bitmap (Original TGA Format) | 333 | |
| TGD | Terragen 2 World File | 6 | |
| TGF | MDL Transportable Graphics Format | 13 | |
| TGF | MDL Transportable Graphics Format (DOS/Win) | 26 | |
| TGF | TGF chemical test (UNIX) | 5 | |
| TGF | Tree Generator 3D tree | 10 | |
| TGV | Electronic Arts in-game video | 10 | |
| TGW | Terragen World | 23 | Kyosuke Aoki |
| THEME | Windows Desktop Theme | 8 | |
| THEME | Windows Desktop Theme (with remarks) | 5 | |
| THEMEPACK | Windows 7 theme | 13 | |
| THM | Sony Ericsson Theme (for mobile phones) | 34 | |
| THM | Thumbnail File from Digital Camera Canon G3 | 148 | Roberto 'rbnet' Bolli |
| THMX | Microsoft PowerPoint 2007 theme / template | 12 | |
| THN | Graphics Workshop for Windows Thumbnail | 51 | |
| THP | GameCube THP video | 4 | |
| THR | THOR compressed data | 19 | Label |
| TIB | Acronis True Image file | 39 | Ildar Ibatullin |
| TID | AVCHD Thumbnail Index | 5 | |
| TIF | Macintosh TIFF bitmap (MacBinary) | 1 | |
| TIF/TIFF | BigTIFF bitmap | 4 | |
| TIF/TIFF | Tagged Image File Format Bitmap (big endian) | 2 | |
| TIF/TIFF | Tagged Image File Format Bitmap (little endian) | 17 | |
| TII | TI Interactive Workbook | 5 | |
| TIM | RPC III file | 7 | |
| TIS | Infinity Engine tileset (v1) | 3 | |
| TJN | Taijin Media Net karaoke song | 4 | |
| TJS | Trackjoy GUS Tracker song | 2 | |
| TK1 | Wintec Tools GPS log | 2 | |
| TK3 | Tk3 eBook | 15 | |
| TKC | tKC Cracking Tutorial File | 13 | .Cryorb |
| TKN | Libery BASIC tokenized source | 6 | |
| TKU | TKUY map format | 42 | |
| TL5 | TimeLiner 5.x data | 12 | |
| TLB | SPSS Type Library | 4 | |
| TLB | Type Library (Type1) | 5 | |
| TLB | Type Library (Type2) | 66 | |
| TLO | SPSS Table Look | 52 | |
| TLP | Tunnelier profile | 8 | |
| TLX | Wintertree dictionary | 12 | |
| TM2 | TIM2 PlayStation2 bitmap | 7 | |
| TMD | TextMaker document | 12 | |
| TMD | WorldMachine document | 18 | Chris Malady |
| TMP | AZZ Cardfile data (RTF) | 2 | |
| TMP | AZZ Cardfile data (Text) | 2 | |
| TMP | NeroAudio Peak file | 2 | |
| TMPL | eMule Web Interface template | 12 | |
| TMS | Telemate compiled script | 3 | |
| TNC | SuperJPG ThumbNail Cache file | 17 | |
| TNC | TI-Nspire CAS OS image | 4 | |
| TNEF/DAT | Transport Neutral Encapsulation Format | 7 | |
| TNO | TI-Nspire OS image | 5 | |
| TNS | TI-Nspire Document | 24 | |
| TO4/T4 | Top 4 compressed data | 17 | Label |
| TOAST | Toast CD Image | 8 | |
| TOC | LaTeX table of contents | 8 | |
| TOC | World of Warcraft TOC file | 15 | |
| TOP | Waltop digital ink-pad graphic | 6 | Josef Schneider |
| TORRENT | BitTorrent Link | 46 | |
| TORRENT | BitTorrent Link (Trackerless) | 13 | |
| TOS | Atari ST TOS executable | 16 | |
| TP | TinkerPlots document | 107 | |
| TP3 | Trackerpacker 3 Music | 9 | |
| TPF | HiJaak PCL soft font | 8 | |
| TPH | Turbo Pascal Help | 4 | |
| TPK | Tochal Package | 2 | |
| TPP | Teleport Pro (generic) Project File | 13 | |
| TPP | Teleport Pro 1.29.1921 Project | 5 | Alex Paven |
| TPP | Teleport Pro 1.29.1972 Project File | 7 | Roberto 'rbnet' Bolli |
| TPS | Clarion Topspeed Data file | 24 | |
| TPU | Borland Turbo Pascal 5.5 compiled Unit | 13 | |
| TPU | Borland Turbo Pascal 6.0 compiled Unit | 9 | |
| TPU | Borland Turbo Pascal 7.0 compiled Unit | 22 | |
| TPU | Borland Turbo Pascal compiled Unit (generic) | 39 | |
| TPX | Photo Express Template | 10 | |
| TR | TomeRaider e-book/document | 4 | |
| TR3 | TomeRaider 3 eBook | 6 | |
| TRC | True BASIC compiled code | 7 | |
| TRC | a-squared Anti-Malware checksum for signatures files | 38 | Scrapie |
| TRD | TR Assist Dictionary | 2 | |
| TRD | TrID defs package | 6 | |
| TRE | Star Wars Galaxies TRE archive | 5 | |
| TRF | LFToolkit Transformation Rules File | 4 | |
| TRK | Fugawi Tracklog file | 5 | |
| TRK | Garmin PCX5 track file | 32 | |
| TRK | GeneRally track | 17 | Davide "Airex" Airaghi |
| TRK/WPT | Magellan MapSend | 7 | |
| TRP | Ports of Call savegame | 6 | |
| TRS | TrIDNet serialized definitions package | 5 | |
| TRV | Track Record Viewer TRV/TRVX definition | 19 | |
| TRV | Traverse PC Desktop Survey Data | 2 | |
| TRX | Track Record Viewer TRV/TRVX Index | 16 | |
| TS | MPEG-2 Transport Stream | 4 | |
| TS | Qt Translation source file | 14 | |
| TSC/SCH | TINA Schematic | 8 | |
| TSK | Skin / Theme for Pocket PC PDAs | 21 | |
| TST | ExamView Test | 26 | |
| TST | K+K Research TAC compressed audio | 38 | |
| TST | TestGen data | 11 | |
| TTA | TTA lossless compressed audio | 29 | |
| TTC | TrueType Font Collection | 13 | |
| TTF | TrueType Font | 537 | Davide "Airex" Airaghi |
| TV4 | TValue project | 2 | |
| TVC | NK - BMP/TV lossless compressed bitmap | 11 | |
| TVGSKIN | TVgenial Skin | 2 | |
| TVS | TeamViewer Session | 3 | |
| TVS | TuneUp Visual Style | 6 | |
| TWD | MindMapper Map | 8 | |
| TWF | PCsync for Windows | 6 | D@rkPhoenix |
| TWL | GPS track | 14 | |
| TWW | Tagwrite Template | 16 | |
| TXM | TrakAx Mixer Configuration data | 4 | |
| TXT | FireFly menu definition | 4 | |
| TXT | Macintosh plain text (MacBinary) | 1 | |
| TXT | RealCADD script | 9 | |
| TXT | Text - BOCU-1 encoded | 1 | |
| TXT | Text - SCSU encoded | 1 | |
| TXT | Text - UTF-16 (BE) encoded | 1 | |
| TXT | Text - UTF-16 (LE) encoded | 1 | |
| TXT | Text - UTF-32 (BE) encoded | 1 | |
| TXT | Text - UTF-32 (LE) encoded | 1 | |
| TXT | Text - UTF-7 encoded | 1 | |
| TXT | Text - UTF-8 encoded | 1 | |
| TXT | Text - UTF-EBCDIC encoded | 1 | |
| TXT | WinHex data structure template | 16 | |
| TXTDT | DVD TEXT data file | 3 | |
| TZ/TZIP | tzip compressed file | 2 | |
| TZX | RamSoft's MakeTZX ZX Spectrum Tape image | 131 | |
