since 2000
Alphabetic File Extension List: q
The file extension list you requested is shown on this page. It loads as a table so please give it a moment as some of the lists are quite long. These lists contain basic information: the extension, the name of the program it works with, the specific function of the file, and the company that makes the program. Not all extensions have all of the data. Click on the extension of interest to see the detail page for that extension. Total extensions in this particular list: 377.
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| Extension | Information |
| Q | Quantum Compressed Archive (Cinematronics) |
| Q | Win95 Fax Queue |
| Q0 | Q0 Graphic |
| Q00 | Quicken 2000 File (Intuit Inc.) |
| Q01 | Quicken 2001 File (Intuit Inc.) |
| Q03 | QuickTax Year 2003 Return (Intuit Canada) |
| Q04 | QuickTax Year 2004 Return (Intuit Canada) |
| Q1 | Winamp Equalizer Settings (Nullsoft) |
| Q1A | QuickClean Restore Point (Network Associates Technology, Inc.) |
| Q1Q | LunarCell Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) |
| Q1Q | LunarCell Plug-in File |
| Q2Q | Flexify Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) |
| Q3D | Quest3D Interactive 3D File (Act-3D B.V.) |
| Q3D | Quickdraw 3D File |
| Q3O | Quick3D Model |
| Q3Q | 360 Total Security Sandbox data |
| Q3X | QuickTime QuickDraw 3D Extension (Apple Inc.) |
| Q4Q | Solar Cell Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) |
| Q4W | Qualitek-4 Data File (Nutek, Inc.) |
| Q5Q | SuperBladePro Preset |
| Q5R | Melancholytron Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) |
| Q7Q | India Ink Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) |
| Q8R | Flood Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) |
| Q98 | Quicken 98 File (Intuit Inc.) |
| Q99 | Quicken 99 File (Intuit Inc.) |
| Q9Q | BladePro Graphic Plug-in File |
| Q9R | Glitterato Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) |
| Q9S | Mr. Contrast Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) |
| QAA | WinQSB Data Input File (John Wiley & Sons, Inc.) |
| QAB | QABUTIL File |
| QAB | SYBYL Binary Field Files |
| QAD | PF QuickArt Document |
| QAD | WordPerfect PerfectFit QuickArt NameSpace .WPG Thumbnail (Corel Corporation) |
| QAF | Autodesk AutoCAD, PTC Creo Parametric CAD-related data |
| QAG | Norton Desktop Quick Access Group |
| QAP | Omnis Quartz Application File |
| QAT | Office Quick Access Toolbar Info (Microsoft Corporation) |
| QAX | ExpressTracker Data File |
| QB | MicroCase QBank (Cengage Learning) |
| QB | Q-Builder Study Cards File (Q-Builder Technology, Inc.) |
| QB | Tony Hawk's Pro Skater Script (Neversoft Entertainment) |
| QB1 | Quicken (Intuit Inc.) |
| QBA | QuickBooks accountant's copy of working file (Intuit) |
| QBAA | QuickBooks Encrypted PDF |
| QBB | QuickBooks financial data backup file (Intuit Inc.) |
| QBC | qDos Batch File (Q-Base Team) |
| QBD | Keyboard Layout |
| QBD | Win3 Quicken File |
| QBE | dBASE IV Saved Query |
| QBE | Example Query |
| QBE | Quattro Pro Saved Query |
| QBF | QuickBASIC Font File |
| QBI | QuickBooks Crash Roll Back File (Intuit, Inc.) |
| QBK | TurboTax database backup file (Intuit Canada ULC) |
| QBL | Business Lawyer Document |
| QBM | QuickBooks financial data backup file (Intuit Inc.) |
| QBMB | QuickBooks financial data backup file (Intuit Inc.) |
| QBO | dBASE compiled query (dBASE) |
| QBO | Quickbooks financial data (Intuit) |
| QBS | Quick Basic Program File (Microsoft Corporation) |
| QBW | QuickBooks primary working data file (Intuit) |
| QBX | QuickBooks financial data backup file (Intuit Inc.) |
| QBY | QuickBooks accountant's copy import file (Intuit) |
| QC | Progress results configuration (Progress Software Corporation) |
| QC | Quake-C source code (id) |
| QC | Steam 3D model compiler script (Valve) |
| QCB | Combat Flight Simulator Quick Combat Editor File (Microsoft Corporation) |
| QCB | QConBridge |
| QCC | QC-CALC File |
| QCC | QUCM Firmware Upgrade |
| QCD | Cliq Accessories Phonebook Data |
| QCD | QuarkCopyDesk SE |
| QCE | QuickCrypto Encrypted File (Cybernescence) |
| QCF | Miliki Super Compressor Pro QuikCAT Compressed File (QuikCAT Technologies) |
| QCF | Q-emuLator |
| QCF | QuickBASIC Coordinates File |
| QCF | QuickLogic Constraint File |
| QCH | Quicken DOS ver 2 Data File (Intuit Inc.) |
| QCH | SSI Dark Queen of Krynn File |
| QCI | Cliq Accessories Phonebook Index |
| QCI | Massively Parallel Quantum Chemistry Program File |
| QCK | Jigsaw 2 Astrological Tool File |
| QCK | Quick Charts File |
| QCK | Quick Foram Count File |
| QCK | QuickCard File |
| QCK | VAX CRYSTALS Chemical Crystallogaphy File |
| QCM | 3164 Emulator Quick Command File |
| QCM | QUCM Application File |
| QCMBIN | Quiz Creator Quiz Content Binary |
| QCN | Qualcomm QCN Tool, QPST/QFIL RF Calibration Data |
| QCOW | QEMU (Fabrice Bellard) |
| QCOW2 | QEMU virtual hard disk image (QEMU Team) |
| QCP | PureVoice File (Qualcomm) |
| QCS | CADQC Standard File |
| QCT | Memory-Map File |
| QD | SHARP MZ-series Emulator File |
| QD0 | Omnis Quartz Data File Segment 10 |
| QD1 | Omnis Quartz Data File Segment 10 |
| QD2 | Omnis Quartz Data File Segment 2 |
| QD3 | Omnis Quartz Data File Segment 3 |
| QD3 | QuickDraw 3D Metafile |
| QD3D | QuickDraw 3D Metafile |
| QD4 | Omnis Quartz Data File Segment 4 |
| QD5 | Omnis Quartz Data File Segment 5 |
| QD6 | Omnis Quartz Data File Segment 6 |
| QD7 | Omnis Quartz Data File Segment 7 |
| QD8 | Omnis Quartz Data File Segment 8 |
| QD9 | Omnis Quartz Data File Segment 9 |
| QDA | Delphi archived file associated with library (Embercadero) |
| QDA | KaleidaGraph file containing graphing data (Synergy Software) |
| QDAT | QuickTime Installer Cache (Apple Inc.) |
| QDB | CUEcards (Marcus Humann) |
| QDB | Quicken Data File Backup (Intuit Inc.) |
| QDC | Quick Devis Data (Quotalys Ltd) |
| QDE | qDos Executable (Q-Base Team) |
| QDF | Label Matrix label file (Teklynx) |
| QDF | QUADRO 3D playset model data file (Quadro) |
| QDF | Quicken financial data file (Quicken) |
| QDF | Snapform Designer electronic form document file (Ringler) |
| QDF-BACKUP | Quicken Quicken Data Backup |
| QDI | Dictionary |
| QDI | Quicken Data File (Intuit Inc.) |
| QDK | Quarterdeck QEMM File |
| QDP | KaleidaGraph Plot File (Synergy Software) |
| QDP | MPQDraft Plug-in |
| QDT | QuarkXpress Dictionary File (Quark, Inc.) |
| QDT | Question Mark Desigener Test File |
| QDT | QuickBooks UK Accountancy Data File (Intuit, Inc.) |
| QDT | Quicken Data File (Intuit Inc.) |
| QDV | Random Dot Software QDV Graphic |
| QDV | Steve Blackstock Giffer Graphics File |
| QE4 | Kingpin Project File |
| QEA | Sparx Systems Enterprise Architect Enterprise Architect Model |
| QEF | Excel Query (Microsoft Corporation) |
| QEL | Quicken Electronic Library File (Intuit Inc.) |
| QEM | Expensable Report |
| QEP | IRMA Wordstation for Windows |
| QES | EpiData Questionnaire File (EpiData Association) |
| QEX | ExpensAble Data File |
| QF | Dispatch Qantas Itinerary Manager Timetable Export File (Scott Andrew Borton) |
| QF | FORTRAN Embedded QUEL |
| QF | Qompose HTML Template (Wade Bowmer) |
| QF | Query Filter |
| QFC | QuickFileCollection Archive |
| QFD | Quicken (Intuit Inc.) |
| QFG | Quicken (Intuit Inc.) |
| QFI | Quicken 2002 File (Intuit Inc.) |
| QFI | QuickTime Image (Apple Inc.) |
| QFL | Family Lawyer Document |
| QFN | QuickTime Font File (Apple Inc.) |
| QFS | Need for Speed Compressed Image (Electronic Arts, Inc.) |
| QFX | Quick Link fax bitmap image (Smith Micro) |
| QFX | Quicken financial exchange file (Quicken) |
| QGS | QGIS QGIS Project File |
| QGZ | QGIS QGIS Project Archive |
| QHC | Qt Assistant Qt Help Documentation |
| QHD | ViewChoice (Payroll Associates, LLC) |
| QHF | QIP Infium Instant Messenger History File (QIP Designers) |
| QIC | Windows Backup Utility data backup file (Microsoft Corporation) |
| QID | Quicken (Intuit Inc.) |
| QIF | DESQview compressed font archive (NortonLifeLock) |
| QIF | GnuCash transaction records (GnuCash Development Team) |
| QIF | Quicken transaction records (Intuit) |
| QIF | QuickTime image (Apple) |
| QIF | Sublime quality information framework document (Sublime) |
| QIN | Quinnsoft MP3 Player Data File (Quinnsoft) |
| QIP | DESQview Compressed Program Archive (Symantec Corporation) |
| QIX | Quicken DOS ver 2 Data File (Intuit Inc.) |
| QIZ | Minimouse's Quiz File |
| QIZ | Quizzical Test |
| QKT | Works (Microsoft Corporation) |
| QL | Progress Results Configuration (Progress Software Corporation) |
| QL$ | MS Compressed QLB |
| QLB | C and QuickBasic-DOS and Visual Basic Quick Library (Microsoft Corporation) |
| QLC | PostScript Help File |
| QLC | Type Manager ATM Type 1 Font Script (Adobe Systems Incorporated) |
| QLE | QOOLE |
| QLF | Family Tree Maker Genealogy File |
| QLGENERATOR | OS X 10.5 Quick Look Generator File (Apple Inc.) |
| QLI | Statler Stitcher (Gammill, Inc.) |
| QLP | QuickLink Printer Driver |
| QM | Qt SDK compiled translation source file (Qt) |
| QM | Quality Motion streaming video file (KDDI) |
| QM2 | Dragon Raja Character File (E-Sofnet Products, Inc.) |
| QM4 | QMail Mail Door Option or Services File |
| QMA | Qedit File |
| QMBL | Logger Pro experiment results file (Vernier) |
| QMD | Quicken Windows ver 5, 6 Data File (Intuit Inc.) |
| QME | Win3 Quicken Windows File |
| QMF | Lotus Approach Database Query |
| QMG | Theme Designer theme image or animation (Samsung) |
| QML | QGIS project (QGIS Development Team) |
| QML | Qt SDK user interface component (Qt) |
| QML | Quicken financial data (Quicken) |
| QMLC | Qt Creator Qt dev cache files |
| QMLTYPES | Qt Creator QML type metadata |
| QMO | ChemetriQ Inspection System Stored Qcept Metrology Objects (Qcept Technologies Inc.) |
| QMP | SeeYou Raster Maps (Naviter) |
| QMR | OzWin CompuServe E-mail/Forum Access Quickscan History |
| QMT | Quicken Memory List (Intuit Inc.) |
| QMX | Quantum Streaming Video Stream Control File (Move Networks, Inc.) |
| QN2 | QuickNote File |
| QNA | High ASCII Quake Name Maker |
| QNC | Cliq Accessories Notepad Customization |
| QND | Cliq Accessories Notepad Data |
| QNE | Organize Quick and Easy (Individual Software Inc.) |
| QNI | Cliq Accessories Notepad Index |
| QNM | High ASCII Quake Name Maker |
| QNT | Chromeleon Quantification Method |
| QNX | Quicken Index (Intuit Inc.) |
| QOS | Notes Full Text Index (IBM) |
| QP03 | qpress qpress Compressed Archive |
| QPB | Quicken Payroll File (Intuit Inc.) |
| QPC | KaleidaGraph Plot File (Synergy Software) |
| QPD | QP Software Dynamic Plug-in |
| QPD | Qualified Plan Distribution and Tax Analysis System (QPDS) (DATAIR Employee Benefit Systems, Inc.) |
| QPD | Win3 Quicken Windows File |
| QPF | Quartus II Project File (Altera Corporation) |
| QPH | Quicken Price History File (Intuit Inc.) |
| QPI | Win3 Quicken File |
| QPJ | QGIS QGIS Project File |
| QPL | KaleidaGraph Layout File (Synergy Software) |
| QPP | QPresenter & Qpresenter Pro Presentation File (Digital Image LLP) |
| QPR | Dinkum Embedded C++ Abridged Library |
| QPR | Foxpro Relational Query (Microsoft Corporation) |
| QPR | OS/2 Printer Queue Driver |
| QPS | QP Software Application File |
| QPT | QGIS Print Layout Template |
| QPW | Quattro Pro spreadsheet (Corel) |
| QPX | Foxpro Ordered Query (Microsoft Corporation) |
| QPX | QuickTime Player Plug-in (Apple Inc.) |
| QQLC | QQLive Compressed Images |
| QQT | Quick Qard Technology Qardware Definition File |
| QR2 | Delphi Database Quick Report File (Borland Software Corporation) |
| QRC | Qt SDK resource collection file (Qt) |
| QRC | QuarkXPress required application component file (Quark) |
| QRD | BI/Query Query Result |
| QREF | IS MU Test Client Exam description reference |
| QRF | QR Designer Form File (PJ Applications) |
| QRF | Questions-Réponses Quiz File (Thomas and Mathieu DUABELE) |
| QRM | Qworum Message (Armangil Software) |
| QRP | DR Hardware system report file (Peter Gebhard) |
| QRP | Gupta Report Builder report file (OpenText) |
| QRP | iValuation investment report file (Software Exception) |
| QRP | Liberty BASIC report file (Shoptalk Systems) |
| QRP | Mamut Dosh Cashbook financial report file (Visma) |
| QRP | QuickReport report file (QBS) |
| QRS | SlickRun MagicWord Pack (Bayden Systems) |
| QRS | WordPerfect Equation Editor (Corel Corporation) |
| QRT | QR Designer Form Project File (PJ Applications) |
| QRT | QRT Ray Tracing Graphic |
| QRT | QuickRoute |
| QRY | BI/Query Query |
| QRY | dBASE IV Query |
| QRY | Lotus Approach Query for SQL Tables |
| QRY | Query |
| QRY | Query (Microsoft Corporation) |
| QRY5 | AmiBroker Saved queries |
| QS9 | OzWin CompuServe E-mail/Forum Access Scan Result File |
| QSA | Encrypted QSA Specifications Database Export File |
| QSC | KaleidaGraph Script File (Synergy Software) |
| QSC | Pxyl Visuals Chart |
| QSCX | Qlik Sense Qlik Sense app |
| QSD | Quicken Windows Data File (Intuit Inc.) |
| QSF | Customer Surveys data backup file (Qualtrics) |
| QSF | Micrografx QuickSilver Compressed Internet Live Graphic |
| QSF | Quintessential Player data backup file (Quinnware) |
| QSG | Quest Saved Game (Axe Software) |
| QSK | Quintessential Player Skin (Quinnware) |
| QSL | OzWin CompuServe E-mail/Forum Access Forum Quickscan List |
| QSL | Questionnaire Specification Language File |
| QSM | QuadriSpace Model Format File |
| QSN | TAPCIS QuickScan Data |
| QSP | QSP Player Game Data |
| QSPLUGIN | Quicksilver Plug-in (Blacktree, Inc.) |
| QSS | QT SDK style sheet file (The Qt Company) |
| QSS | Quantum Streaming Player video stream segment file (Move Networks) |
| QSS | QuickBooks appearance file (Intuit) |
| QST | Ami Pro QuickStart Tutorial Image (IBM) |
| QST | KaleidaGraph Style File (Synergy Software) |
| QST | Quake Spy Tab File |
| QST | Zelda Classic Quest (Armageddon Games) |
| QSV | Jigs@w Saved Puzzle State (Tibo Software) |
| QSXL | QuickLayout Session Data (Advanced Publishing Systems Pty Ltd) |
| QSZ | Quizlet Study sets |
| QT | Creator NXT movie (Roxio) |
| QT | PowerDVD movie (CyberLink) |
| QT | QuickTime movie (Apple) |
| QT1 | ViewChoice (Payroll Associates, LLC) |
| QT2 | ViewChoice (Payroll Associates, LLC) |
| QTA | qtar Archive |
| QTC | Incite Media Assistant File |
| QTC | QuickTime Ver 2.0+ Windows CODEC (Apple Inc.) |
| QTCH | Quicktime Cached File (Apple Inc.) |
| QTE | Questionnaire Specification Language File |
| QTF | Qtracker Filter |
| QTI | Canvas learning materials and quizzes (Instructure) |
| QTI | QtiPlot project (IonDev) |
| QTI | QuickTime image (Apple) |
| QTI | Respondus learning materials and quizzes (Respondus) |
| QTIF | QuickTime Image (Apple Inc.) |
| QTK | Apple Quicktake (Apple Inc.) |
| QTL | QuickTime Media Link (Apple Inc.) |
| QTL | YUV SECAM or PAL image |
| QTM | QuickTime Movie (Apple Inc.) |
| QTMP | Qtracker Mapshot Pack |
| QTN | Norman Virus Control Quarantine File (Norman) |
| QTP | Astra Quicktest Report |
| QTP | QuickTime Preferences (Apple Inc.) |
| QTPF | QuickTime PreFlight Text (Apple Inc.) |
| QTPP | Qtracker Program Package |
| QTR | QuickTime Resource File (Apple Inc.) |
| QTS | Macintosh PICT Image |
| QTS | QuickTime System File (Apple Inc.) |
| QTSCPT | Quicktime Script File (Apple Inc.) |
| QTSK | Qtracker Skin |
| QTV | QuickTime Virtual Reality Movie (Apple Inc.) |
| QTVR | QuickTime VR (Apple Inc.) |
| QTW | QText File |
| QTX | ColorReader color sample information (Datacolor) |
| QTX | QSetup data (Pantaray) |
| QTX | Quicken tax transfer data (Intuit) |
| QTX | QuickTime extension (Apple) |
| QTZ | Quartz Composer Data (Apple Inc.) |
| QTZ | QuaSZ Texture File (Mystic Fractal) |
| QUAD | QUAD Compressed Archive (Ilia Muraviev) |
| QUB | Qubus (KPMG) |
| QUE | CuteFTP Queue File (GlobalSCAPE) |
| QUE | Interviewer Voxco Questionnaire (Voxco Inc.) |
| QUE | PDP-10 Print Queue, Submit Queue, Plot Queue |
| QUE | Sphinx Questionnaire (Le Sphinx Développement) |
| QUE | SurveySolutions Questionnaire (Perseus Development Corporation) |
| QUE | Task Scheduler Queue Object |
| QUERY | PCHealth Query (Microsoft Corporation) |
| QUEST | Apple II operating system Golden Orchard Apple II CD Rom file |
| QUESTPHASE | Cyberpunk 2077 (Red Engine) Quest Data |
| QUI | Brain Quiz File |
| QUICKDRAW | Apple II operating system Golden Orchard Apple II CD Rom file |
| QUICKEN | Quicken Spreadsheet (Intuit Inc.) |
| QUICKTIME | QuickTime Player Video Container Format |
| QUIZ | Quiz Software Zipped Quiz Packages |
| QUOTAMANAGER | SQLite database file Quote Database |
| QUP | QuickTime Update Package (Apple Inc.) |
| QUT | IBM Voice Type Language Vocabels File |
| QVD | QlikView database table (Qlik) |
| QVD | Quaanta data (GalaxyBeing) |
| QVF | Qlik Sense visualization file (Qlik) |
| QVF | QlikView visualization file (Qlik) |
| QVM | Quake File |
| QVP | ViewletBuilder Project File (Qarbon, Inc.) |
| QVT | Quantum Streaming Video Stream URL (Move Networks, Inc.) |
| QVW | QlikView document file (Qlik) |
| QW | Symantec Q&A Write Program File (Symantec Corporation) |
| QW5 | Quicken 5 File (Intuit Inc.) |
| QW6 | Quicken 6 File (Intuit Inc.) |
| QWB | Money Quotes WriteBack Import File (Microsoft Corporation) |
| QWK | QWK Reader Message |
| QWP | Quiptics Puzzle File |
| QX | Quexal Source Code (Stefano Tommesani) |
| QXB | QuarkXpress Books File (Quark, Inc.) |
| QXD | QuarkXPress document (Quark) |
| QXF | Quicken exchange data file (Quicken) |
| QXL | QuarkXpress Element Library (Quark, Inc.) |
| QXM | Quexal Macro (Stefano Tommesani) |
| QXN | Quicken Quicken data file |
| QXP | QuarkXPress design project (Quark) |
| QXP | QuickCreate project (SanScrip) |
| QXT | QuarkXpress Template File (Quark, Inc.) |
| QZ | Create A Quiz Exam File (PC Shareware, Inc.) |
| QZA | QIIME 2 Microbiome data |
| QZB | QuaSZ Zbuffer File (Mystic Fractal) |
| QZB | Quizzical Test |
| QZD | QuizPro Quiz Data (Luzius Schneider) |
| QZE | QuizPro Quiz Data (Luzius Schneider) |
| QZM | QuizMaster File |
| QZS | QuizPro Quiz Data (Luzius Schneider) |
| QZTP | QuickTime QuickTime Preferences file (Apple) |
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