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: 340.
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| Extension |
Information |
| Q |
Quantum Compressed Archive (Cinematronics) |
| Q |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| 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 |
| Q2 |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| Q2Q |
Flexify Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) |
| Q3D |
Quickdraw 3D File |
| Q3D |
Quest3D Interactive 3D File (Act-3D B.V.) |
| Q3O |
Quick3D Model |
| 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 |
WordPerfect PerfectFit QuickArt NameSpace .WPG Thumbnail (Corel Corporation) |
| QAD |
PF QuickArt Document |
| QAG |
Norton Desktop Quick Access Group |
| QAP |
Omnis Quartz Application File |
| QAT |
Office Quick Access Toolbar Info (Microsoft Corporation) |
| QAX |
ExpressTracker Data File |
| QB |
Tony Hawk's Pro Skater Script (Neversoft Entertainment) |
| QB |
Q-Builder Study Cards File (Q-Builder Technology, Inc.) |
| QB |
MicroCase QBank (Cengage Learning) |
| QB1 |
Quicken (Intuit Inc.) |
| QBA |
QuickBooks Accountant's Copy File (Intuit, Inc.) |
| QBB |
QuickBooks Backup File (Intuit, Inc.) |
| QBC |
qDos Batch File (Q-Base Team) |
| QBD |
Win3 Quicken File |
| QBD |
Keyboard Layout |
| 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.) |
| QBL |
Business Lawyer Document |
| QBM |
QuickBooks Portable Company File (Intuit Inc.) |
| QBO |
dBASE IV Ordered Query |
| QBS |
Quick Basic Program File (Microsoft Corporation) |
| QBW |
Quicken (Intuit Inc.) |
| QBW |
QuickBooks Primary Data File (Intuit, Inc.) |
| QBX |
QuickBooks Accountant Transfer File (Intuit Inc.) |
| QC |
Progress Results Configuration (Progress Software Corporation) |
| QC |
Quake-C Source Code File (id Software) |
| QC |
Steam Source SDK Model Source File (Valve Corporation) |
| QC |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QCB |
QConBridge |
| QCB |
Combat Flight Simulator Quick Combat Editor File (Microsoft Corporation) |
| QCC |
QUCM Firmware Upgrade |
| QCC |
QC-CALC File |
| QCD |
QuarkCopyDesk SE |
| QCD |
Cliq Accessories Phonebook Data |
| QCE |
QuickCrypto Encrypted File (Cybernescence) |
| QCF |
QuickBASIC Coordinates File |
| QCF |
Q-emuLator |
| QCF |
QuickLogic Constraint File |
| QCF |
Miliki Super Compressor Pro QuikCAT Compressed File (QuikCAT Technologies) |
| QCH |
SSI Dark Queen of Krynn File |
| QCH |
Quicken DOS ver 2 Data File (Intuit Inc.) |
| QCI |
Cliq Accessories Phonebook Index |
| QCI |
Massively Parallel Quantum Chemistry Program File |
| QCK |
Quick Foram Count File |
| QCK |
Quick Charts File |
| QCK |
QuickCard File |
| QCK |
VAX CRYSTALS Chemical Crystallogaphy File |
| QCK |
Jigsaw 2 Astrological Tool File |
| QCM |
QUCM Application File |
| QCM |
3164 Emulator Quick Command File |
| QCOW |
QEMU (Fabrice Bellard) |
| QCOW2 |
QEMU (Fabrice Bellard) |
| 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 |
QuickDraw 3D Metafile |
| QD3 |
Omnis Quartz Data File Segment 3 |
| 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 |
KaleidaGraph Data File (Synergy Software) |
| QDA |
Quadruple D Archive |
| QDAT |
QuickTime Installer Cache (Apple Inc.) |
| QDAUX |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QDB |
CUEcards (Marcus Humann) |
| QDB |
Quicken Data File Backup (Intuit Inc.) |
| QDC |
Quick Devis Data (Quotalys Ltd) |
| QDE |
qDos Executable (Q-Base Team) |
| QDF |
Snapform Form Document (Ringler Informatik AG) |
| QDF |
Quicken Windows Data File (Intuit Inc.) |
| QDF |
Label Matrix Bar Code Label (Teklynx Software Solutions) |
| QDI |
Quicken Data File (Intuit Inc.) |
| QDI |
Dictionary |
| QDK |
Quarterdeck QEMM File |
| QDP |
MPQDraft Plug-in |
| QDP |
KaleidaGraph Plot File (Synergy Software) |
| QDT |
Quicken Data File (Intuit Inc.) |
| QDT |
QuickBooks UK Accountancy Data File (Intuit, Inc.) |
| QDT |
Question Mark Desigener Test File |
| QDT |
QuarkXpress Dictionary File (Quark, Inc.) |
| QDV |
Steve Blackstock Giffer Graphics File |
| QDV |
Random Dot Software QDV Graphic |
| QE4 |
Kingpin Project File |
| 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 |
FORTRAN Embedded QUEL |
| QF |
Query Filter |
| QF |
Qompose HTML Template (Wade Bowmer) |
| QF |
Dispatch Qantas Itinerary Manager Timetable Export File (Scott Andrew Borton) |
| QFC |
QuickFileCollection Archive |
| QFD |
Quicken (Intuit Inc.) |
| QFG |
Quicken (Intuit Inc.) |
| QFI |
QuickTime Image (Apple Inc.) |
| QFI |
Quicken 2002 File (Intuit Inc.) |
| QFL |
Family Lawyer Document |
| QFN |
QuickTime Font File (Apple Inc.) |
| QFS |
Need for Speed Compressed Image (Electronic Arts, Inc.) |
| QFX |
Quicken Transfer File (Intuit Inc.) |
| QFX |
Quick Link/Quick Link II Fax |
| QHD |
ViewChoice (Payroll Associates, LLC) |
| QHF |
QIP Infium Instant Messenger History File (QIP Designers) |
| QIC |
Windows Backup Backup Set (Microsoft Corporation) |
| QID |
Quicken (Intuit Inc.) |
| QIF |
DESQview Compressed Font Archive (Symantec Corporation) |
| QIF |
Quicken Interchange Format (Intuit Inc.) |
| QIF |
QuickTime Image (Apple Inc.) |
| 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 |
Type Manager ATM Type 1 Font Script (Adobe Systems Incorporated) |
| QLC |
PostScript Help File |
| 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 |
Quality Motion Streaming Video File (KDDI R&D Labs. Inc.) |
| QM |
Qt Message File (Qt Software) |
| QM2 |
Dragon Raja Character File (E-Sofnet Products, Inc.) |
| QM4 |
QMail Mail Door Option or Services File |
| QMA |
Qedit File |
| QMD |
Quicken Windows ver 5, 6 Data File (Intuit Inc.) |
| QME |
Win3 Quicken Windows File |
| QMF |
Lotus Approach Database Query |
| QML |
Quicken DOS ver 2 Data File (Intuit Inc.) |
| 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 |
Win3 Quicken Windows File |
| QPD |
QP Software Dynamic Plug-in |
| QPD |
Qualified Plan Distribution and Tax Analysis System (QPDS) (DATAIR Employee Benefit Systems, Inc.) |
| QPF |
Quartus II Project File (Altera Corporation) |
| QPH |
Quicken Price History File (Intuit Inc.) |
| QPI |
Win3 Quicken File |
| QPL |
KaleidaGraph Layout File (Synergy Software) |
| QPP |
QPresenter & Qpresenter Pro Presentation File (Digital Image LLP) |
| QPR |
OS/2 Printer Queue Driver |
| QPR |
Foxpro Relational Query (Microsoft Corporation) |
| QPR |
Dinkum Embedded C++ Abridged Library |
| QPS |
QP Software Application File |
| QPW |
Quattro Pro Project File (Corel Corporation) |
| QPX |
QuickTime Player Plug-in (Apple Inc.) |
| QPX |
Foxpro Ordered Query (Microsoft Corporation) |
| QQT |
Quick Qard Technology Qardware Definition File |
| QR2 |
Delphi Database Quick Report File (Borland Software Corporation) |
| QRC |
Qt Resource Collection File (Qt Software) |
| QRD |
BI/Query Query Result |
| QRF |
QR Designer Form File (PJ Applications) |
| QRF |
Questions-Réponses Quiz File (Thomas and Mathieu DUABELE) |
| QRM |
Qworum Message (Armangil Software) |
| QRP |
Liberty for Windows Report File |
| QRP |
COW2000 Report (Software Exception) |
| QRP |
QuickReport Report (QuSoft) |
| QRP |
DR Hardware File |
| QRP |
Dosh Software File |
| QRP |
Gupta Report Builder File |
| QRS |
SlickRun MagicWord Pack (Bayden Systems) |
| QRS |
WordPerfect Equation Editor (Corel Corporation) |
| QRT |
QRT Ray Tracing Graphic |
| QRT |
QuickRoute |
| QRT |
QR Designer Form Project File (PJ Applications) |
| QRY |
dBASE IV Query |
| QRY |
Query |
| QRY |
Lotus Approach Query for SQL Tables |
| QRY |
Query (Microsoft Corporation) |
| QRY |
BI/Query Query |
| 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 |
| QSD |
Quicken Windows Data File (Intuit Inc.) |
| QSF |
Millennium 3 Quick Start File |
| QSF |
Quintessential Player Family Skin (Quinnware) |
| QSF |
Micrografx QuickSilver Compressed Internet Live Graphic |
| 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 |
| QSPLUGIN |
Quicksilver Plug-in (Blacktree, Inc.) |
| QSS |
Quantum Streaming Video Stream Segment (Move Networks, Inc.) |
| QST |
KaleidaGraph Style File (Synergy Software) |
| QST |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QST |
Ami Pro QuickStart Tutorial Image (IBM) |
| 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) |
| QT |
QuickTime Movie (Apple Inc.) |
| 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 |
QuickTime Image (Apple Inc.) |
| QTIF |
QuickTime Image (Apple Inc.) |
| QTK |
Apple Quicktake (Apple Inc.) |
| QTL |
YUV SECAM or PAL image |
| QTL |
QuickTime Media Link (Apple Inc.) |
| QTM |
QuickTime Movie (Apple Inc.) |
| QTMP |
Qtracker Mapshot Pack |
| QTN |
Norman Virus Control Quarantine File (Norman) |
| QTP |
QuickTime Preferences (Apple Inc.) |
| QTP |
Astra Quicktest Report |
| 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 |
Qtext Text File |
| QTX |
QuickTime Ver 3/4 Windows CODEC (Apple Inc.) |
| QTX |
Quicken Data File (Intuit Inc.) |
| QTZ |
Quartz Composer Data (Apple Inc.) |
| QTZ |
QuaSZ Texture File (Mystic Fractal) |
| QUAD |
QUAD Compressed Archive (Ilia Muraviev) |
| QUALIFY |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QUALITY |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QUB |
Qubus (KPMG) |
| QUE |
Interviewer Voxco Questionnaire (Voxco Inc.) |
| QUE |
CuteFTP Queue File (GlobalSCAPE) |
| QUE |
PDP-10 Print Queue, Submit Queue, Plot Queue |
| QUE |
SurveySolutions Questionnaire (Perseus Development Corporation) |
| QUE |
Sphinx Questionnaire (Le Sphinx Développement) |
| QUE |
Task Scheduler Queue Object |
| QUENTIN |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QUERY |
PCHealth Query (Microsoft Corporation) |
| QUEST |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QUEST1 |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QUEST2 |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QUI |
Brain Quiz File |
| QUICKDRAW |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QUICKEN |
Quicken Spreadsheet (Intuit Inc.) |
| QUIT |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QUITFX |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QUOTE |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| QUP |
QuickTime Update Package (Apple Inc.) |
| QUT |
IBM Voice Type Language Vocabels File |
| QVD |
Quaanta Media Desktop (GalaxyBeing.com) |
| QVM |
Quake File |
| QVP |
ViewletBuilder Project File (Qarbon, Inc.) |
| QVT |
Quantum Streaming Video Stream URL (Move Networks, Inc.) |
| QVW |
QlikView Document (QlikTech International AB.) |
| 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, Inc.) |
| QXL |
QuarkXpress Element Library (Quark, Inc.) |
| QXM |
Quexal Macro (Stefano Tommesani) |
| QXP |
QuickCreateXP Course Customiser (SanScrip) |
| QXP |
QuarkXpress Project (Quark, Inc.) |
| QXT |
QuarkXpress Template File (Quark, Inc.) |
| QZ |
Create A Quiz Exam File (PC Shareware, Inc.) |
| QZB |
Quizzical Test |
| QZB |
QuaSZ Zbuffer File (Mystic Fractal) |
| QZD |
QuizPro Quiz Data (Luzius Schneider) |
| QZE |
QuizPro Quiz Data (Luzius Schneider) |
| QZM |
QuizMaster File |
| QZS |
QuizPro Quiz Data (Luzius Schneider) |
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