| Extension |
File Description |
|
Common? |
| .$er | GroupWise Database | | No |
| .123 | Lotus 1-2-3 Spreadsheet | | Yes |
| .1pe | TurboTax Form File | | No |
| .1ph | TurboTax File | | No |
| .3dt | 3D Topicscape File | | No |
| .4dv | 4D View Ultrasound File | | No |
| .a3l | Authorware 3 Library | | No |
| .a3m | Authorware 3 Macintosh File | | No |
| .a3w | Authorware 3 Windows File | | No |
| .a4l | Authorware 4 Library | | No |
| .a4m | Authorware 4 Macintosh File | | No |
| .a4w | Authorware 4 Windows File | | No |
| .a5l | Authorware 5 Library | | No |
| .a5w | Authorware 5 Windows File | | No |
| .a65 | Authorware 6.5 File | | No |
| .ab | DNA Sequence File | | No |
| .ab1 | DNA Electropherogram File | | No |
| .ab3 | PhotoImpact 3 Album File | | No |
| .abcd | AudioVisual Book Data File | | No |
| .abi | DNA Chromatogram File | | No |
| .ade | Access Project Extension | | No |
| .adp | Access Project | | No |
| .adx | Approach Index File | | No |
| .aft | Ancestry.com Family Tree Database | | No |
| .amb | AIMMS Model File | | No |
| .ask | askSam Database | | No |
| .asm | Solid Edge Assembly Document | | No |
| .ast | ClarisWorks Assistant File | | No |
| .awg | Activeworlds Object Group File | | No |
| .bci | Belarc Advisor Report File | | No |
| .bcm | Business Contact Manager File | | No |
| .bdf | Binary Data File | | No |
| .bgl | Babylon Glossary File | | No |
| .bin | Generic Binary File | | No |
| .bk | FrameMaker Book File | | No |
| .bkk | BookBuddi eBook File | | No |
| .bok | TestGen Testbank File | | No |
| .box | E-mail Mailbox | | No |
| .brd | EAGLE Circuit Board File | | No |
| .btm | BizTalk Map File | | No |
| .cap | Packet Capture File | | No |
| .cat | Advanced Disk Catalog Database | | No |
| .cbg | CyberGauge Data File | | No |
| .cch | Corel Chart File | | No |
| .ccr | ASTM Continuity of Care Record | | No |
| .cdf | Common Data Format | | No |
| .chg | Quicken Online Data File | | No |
| .chn | Ethnograph Data | | No |
| .ckt | CircuitMaker File | | No |
| .clp | Windows Clipboard File | | No |
| .crd | Windows Cardfile | | No |
| .csa | PNA Code Calset File | | No |
| .csv | Comma Separated Values File | | Yes |
| .ctf | WhereIsIt Catalog | | No |
| .ctt | Messenger Contact List | | No |
| .cwk | ClarisWorks Document | | No |
| .cws | Claris Works Template | | No |
| .cyo | Clustify Output File | | No |
| .cys | Clustify Summary File | | No |
| .daf | Digital Anchor File | | No |
| .dam | DeltaMaster Analysis Model | | No |
| .das | DeltaMaster Analysis Session | | No |
| .dat | Data File | | Yes |
| .db | Database File | | Yes |
| .db2 | dBASE II Database | | No |
| .dbc | FoxPro Database | | No |
| .dbf | Database File | | No |
| .dbf | FoxPro Table | | No |
| .dbx | Visual FoxPro Table | | No |
| .dcl | DumpSec Report File | | No |
| .ddc | DivX Descriptor File | | No |
| .ddcx | DivX Descriptor 2 File | | No |
| .dem | Digital Elevation Model | | No |
| .des | QuickBooks Forms Template | | No |
| .dex | DEXIS Digital X-ray File | | No |
| .dex | Excel Spreadsheet | | No |
| .dft | Solid Edge Draft Document | | No |
| .dgb | FlashCAD Drawing Database | | No |
| .dif | Data Interchange Format | | No |
| .dii | Summation Batch Load File | | No |
| .dlg | Digital Line Graph | | No |
| .dll | Dynamic Link Library | | Yes |
| .dm2 | Toad Data Modeler 2 File | | No |
| .dmo | Derive Demo | | No |
| .dp1 | DataPower Database File | | No |
| .dsk | Simple IDs Database | | No |
| .e00 | ArcInfo Coverage Export File | | No |
| .eap | Enterprise Architect Project | | No |
| .ebuild | Portage eBuild Script | | No |
| .edb | Exchange Information Store Database | | No |
| .emb | Embroidery Design File | | No |
| .emb | Everest Embedded Bank File | | No |
| .emd | ChessBase Tablebase | | No |
| .emlxpart | Mail Message Attachment | | No |
| .epp | TalaPhoto Project | | No |
| .esp | ACD/Labs Dataset | | No |
| .ess | EasySpreadsheet Spreadsheet | | No |
| .ev | Echoview File | | No |
| .evy | Envoy File | | No |
| .exp | Export File | | No |
| .exp | Aurora Expert Trace File | | No |
| .exx | IBM Linkway MsgPut File | | No |
| .fa | FASTA Formatted Sequence File | | No |
| .fasta | FASTA Sequence File | | No |
| .fcd | First Choice Database | | No |
| .fcs | First Choice Spreadsheet | | No |
| .fdb | Portfolio Catalog | | No |
| .fdb | Art Explosion Catalog | | No |
| .fdb | Microsoft Dynamics NAV Database File | | No |
| .ffd | Flat File Description | | No |
| .flame | Fractal Flame File | | No |
| .fll | FoxPro Dynamic-Link Library | | No |
| .flo | iGrafx FlowCharter File | | No |
| .flp | Activprimary Flipchart File | | No |
| .flt | Flight Simulator Saved Flight | | No |
| .fm | FileMaker Spreadsheet | | No |
| .fm5 | FileMaker 5 Database | | No |
| .fmp | FileMaker Pro Database | | No |
| .fo | XSL-FO Form | | No |
| .fob | Dynamics NAV Object Container File | | No |
| .fop | InfoZoom Protected Data File | | No |
| .fox | InfoZoom Data File | | No |
| .fp | FileMaker Pro Spreadsheet | | No |
| .fp3 | FileMaker Pro 3 Database | | No |
| .fp4 | FileMaker Pro 4 Database | | No |
| .fp5 | FileMaker Pro 5 Database | | No |
| .fp7 | FileMaker Pro 7+ Database | | No |
| .frl | Electronic Form Loader | | No |
| .frm | ADL Form | | No |
| .fro | dBASE IV Compiled Report | | No |
| .frx | FoxPro Report | | No |
| .fsc | Practical Scriptwriter File | | No |
| .ftw | Family Tree File | | No |
| .gc | GraphClick File | | No |
| .gcx | Grapher Graph File | | No |
| .gdb | InterBase Database File | | No |
| .ged | GEDCOM Genealogy Data File | | No |
| .gms | Gesture and Motion Signal File | | No |
| .gnp | GNPeak Output File | | No |
| .gpx | GPS Exchange File | | No |
| .gra | Microsoft Graph File | | No |
| .grf | Generic Graph File | | No |
| .grf | DPlot Graph File | | No |
| .grib | Gridded Binary File | | No |
| .grk | Gradekeeper Class Gradebook File | | No |
| .grr | Gradekeeper Class Roster File | | No |
| .gst | MapInfo Geoset File | | No |
| .gwk | GraphiCode PCB Job File | | No |
| .gxl | Graph Exchange Language File | | No |
| .hdf | Hierarchical Data Format File | | No |
| .hdl | HotDocs Library | | No |
| .hif | Quicken Online File | | No |
| .hl | HeuristicLab Storage File | | No |
| .i5z | IUCLID 5 Import/Export File | | No |
| .ib | InterBase Database | | No |
| .ics | iCalendar File | | No |
| .idx | HMI Historical Log Index File | | No |
| .igc | Anime List Builder Input File | | No |
| .iif | Intuit Interchange Format File | | No |
| .ink | Mimio Ink Data File | | No |
| .inp | ABAQUS Input File | | No |
| .irock | intelliRock Sensor Data File | | No |
| .isf | Inspiration Flowchart Document | | No |
| .itl | iTunes Library File | | No |
| .itn | TomTom Navigator Itinerary File | | No |
| .itw | InTouch With Database File | | No |
| .itx | ITX Form Template | | No |
| .ivt | Beyond 20/20 Table | | No |
| .jef | Janome Embroidery Format | | No |
| .jude | JUDE Project File | | No |
| .kdb | Keypass Database File | | No |
| .kid | Kidspiration Document | | No |
| .kmz | Google Earth Placemark File | | No |
| .kpr | KPresenter Presentation | | No |
| .l | Game of Life File | | No |
| .lbx | FoxPro Label Definition File | | No |
| .lcd | ABBYY Language File | | No |
| .lcf | ArchiCAD Library Container File | | No |
| .lcm | Lipikar Custom Map File | | No |
| .lgh | HMI Historical Log File | | No |
| .lgi | Multimedia Logic File | | No |
| .lib | Generic Data Library | | No |
| .lif | TurboTax Information Archive | | No |
| .lix | Logos Library System File | | No |
| .llb | LabVIEW Library File | | No |
| .lnt | LiveNote Case File | | No |
| .lp7 | LP7 Digitally Signed File | | No |
| .lsf | Logos Library System File | | No |
| .lsp | LANsurveyor Poll List | | No |
| .lsr | LANsurveyor Report | | No |
| .lsu | LANsurveyor Map | | No |
| .m | Mathematica Input File | | No |
| .mai | Microsoft Mail File | | No |
| .mat | MATLAB Variables Binary File | | No |
| .mbg | Mailbag Assistant Mailbox File | | No |
| .mbg | Microsoft Mailbag | | No |
| .mbl | Logger Pro Data File | | No |
| .mbp | Mobipocket Notes File | | No |
| .mbx | Outlook Express Mailbox | | No |
| .mc1 | MedCalc Data File | | No |
| .mc9 | Mastercam 9 Geometry File | | No |
| .mcd | Mathcad Document | | No |
| .md | Moneydance Financial Data File | | No |
| .mdb | Microsoft Access Database | | Yes |
| .mdc | Multi Dimension Cube File | | No |
| .mdf | Measurement Data Format File | | No |
| .mdl | Simulink Model File | | No |
| .mdl | Rational Rose Model File | | No |
| .mdn | Blank Access Database Template | | No |
| .mdt | Access Database Template | | No |
| .mdx | Multiple Index File | | No |
| .mdx | Rational XDE Model File | | No |
| .mdz | Access Wizard Template | | No |
| .mfo | Perl ModInfo Descriptor File | | No |
| .mfp | Macromedia FlashPaper Document | | No |
| .mgc | MGCSoft Equation Illustrator File | | No |
| .mls | Milestones Simplicity File | | No |
| .mm | FreeMind Mind Map | | No |
| .mmap | MindManager Map File | | No |
| .mmc | Microsoft Media Catalog | | No |
| .mmp | MindManager Mind Map | | No |
| .mmp | Master Album Maker Project | | No |
| .mnc | My Notes Center Notebook | | No |
| .mnk | My Notes Keeper Notebook | | No |
| .mny | Microsoft Money File | | No |
| .mobi | Mobipocket eBook | | No |
| .mpx | Microsoft Project Exchange File | | No |
| .mth | Derive Math File | | No |
| .mxd | ArcGIS Map Document | | No |
| .nb | Mathematica Notebook | | No |
| .ndk | Lotus Notes Design Elements File | | No |
| .ndx | dBASE Index File | | No |
| .net | netViz Project File | | No |
| .neta | Netica Binary File | | No |
| .nitf | National Imagery Transmission Format File | | No |
| .nmind | NovaMind Mind Map File | | No |
| .notebook | SMART Notebook File | | No |
| .np | Portfolio NetPublish File | | No |
| .npt | Portfolio NetPublish Template | | No |
| .ns2 | Lotus Notes 2 Database | | No |
| .ns3 | Lotus Notes 3 Database | | No |
| .ns4 | Lotus Notes 4 Database | | No |
| .nsf | Lotus Notes Database | | No |
| .nsf | Lotus Domino Database | | No |
| .nvl | UniChem Results File | | No |
| .nyf | myBase Database File | | No |
| .oab | Offline Address Book | | No |
| .obj | Relocatable Object Code | | No |
| .odb | ABAQUS Database | | No |
| .odf | Open Document File | | No |
| .odp | OpenDocument Presentation | | No |
| .ods | OpenDocument Spreadsheet | | No |
| .odx | BizTalk Server Orchestration File | | No |
| .ofc | Open Financial Connectivity File | | No |
| .ofm | OmniForm Form | | No |
| .ofx | Open Financial Exchange File | | No |
| .oo3 | OmniOutliner 3 File | | No |
| .opf | FlipViewer FlipBook File | | No |
| .opx | OrgPlus Org Chart | | No |
| .opx | FlipAlbum Photo Album File | | No |
| .or4 | Lotus Organizer 4 File | | No |
| .org | Lotus Organizer File | | No |
| .otf | OpenTuft Tufting Design File | | No |
| .otln | Opal Outline File | | No |
| .ots | OpenDocument Spreadsheet Template | | No |
| .ov2 | TomTom Points of Interest Database | | No |
| .ova | Octava Musical Score | | No |
| .ovl | Rollercoaster Tycoon 3 Sprites File | | No |
| .p96 | Win96 Database File | | No |
| .p97 | Win97 Database File | | No |
| .pab | Personal Address Book | | No |
| .pan | Panorama Database File | | No |
| .pcap | Packet Capture | | No |
| .pcb | Printed Circuit Board Design File | | No |
| .pdas | PDAStore Data Store File | | No |
| .pdb | Program Database | | No |
| .pdb | Palm Desktop Database File | | No |
| .pdb | PowerDesigner Database Backup File | | No |
| .pdd | Medtronic Programmer Data File | | No |
| .pdm | PowerDesigner Database File | | No |
| .pds | Planetary Data System File | | No |
| .pex | Merak Peep Data File | | No |
| .pfc | AOL Personal File Cabinet | | No |
| .pfl | Family Lawyer Document | | No |
| .pi | Pi Calculation Data File | | No |
| .pjx | FoxPro Project | | No |
| .pkb | Oracle Package Body File | | No |
| .pkh | Oracle Package File | | No |
| .pks | Oracle Package Spec File | | No |
| .pmd | PageMaker Document | | No |
| .pmr | Performance Monitor Report | | No |
| .postal | TomTom Postal Code File | | No |
| .pot | PowerPoint Template | | No |
| .potx | PowerPoint Open XML Presentation Template | | No |
| .pp2 | PingPlotter Data File | | No |
| .pps | PowerPoint Slide Show | | Yes |
| .ppsx | PowerPoint Open XML Slide Show | | No |
| .ppt | PowerPoint Presentation | | Yes |
| .pptx | Microsoft PowerPoint Open XML Document | | No |
| .prc | Mobipocket eBook File | | No |
| .prj | Project File | | No |
| .prj | AIMMS Project File | | No |
| .psa | Photoshop Album Catalog | | No |
| .psf | SPI Proxy Output File | | No |
| .psm | Prism Document | | No |
| .pst | Personal Folder File | | No |
| .ptb | Power Tab File | | No |
| .ptk | Quicken Online Data File | | No |
| .pub | Publisher Document | | No |
| .pvl | Instalit Library | | No |
| .pwd | Solid Edge Weldment Document | | No |
| .qbw | QuickBooks Data File | | No |
| .qdf | Snapform File | | No |
| .qdf | Quicken Data File | | No |
| .qdfm | Quicken Data File (Macintosh) | | No |
| .qfx | Quicken Financial Exchange File | | No |
| .qif | Quicken Interchange Format File | | No |
| .qpb | Quicken Payroll File | | No |
| .qpm | Quick Pallet Maker Input Data | | No |
| .qpw | Quattro Pro Spreadsheet | | No |
| .rcd | Arcade File | | No |
| .rdb | N64 ROM Database | | No |
| .rdf | Report Definition | | No |
| .rf1 | Retirement Forecast File | | No |
| .rge | Entourage File Archive | | No |
| .rgo | RepliGo File | | No |
| .rnq | Renque Model File | | No |
| .rog | Roger 2 Input Data File | | No |
| .roi | Report Object Instance | | No |
| .rpt | Crystal Reports File | | No |
| .rrr | Rhapzod? Resource Repository | | No |
| .rsw | R&R SQL Report Writer Report File | | No |
| .rte | Navigation Route | | No |
| .s85 | Sabre Airline Solutions Chart | | No |
| .sar | Sibelius Arrange Style | | No |
| .sav | SPSS Data File | | No |
| .sbf | SmartBroker Data | | No |
| .sca | Norton AntiVirus Scan File | | No |
| .scf | DNA Sequence Chromatogram File | | No |
| .sch | EAGLE Schematics File | | No |
| .sdb | OpenOffice.org Base Database File | | No |
| .sdb | ServerBoss Database File | | No |
| .sdb | MonKey Office SQLite Database File | | No |
| .sdc | OpenOffice.org Calc Spreadsheet | | No |
| .sdf | Standard Data File | | No |
| .sdq | SAS Data File | | No |
| .sds | OpenOffice.org Chart | | No |
| .seq | DNA Sequence Text File | | No |
| .sgml | Standard Generalized Markup Language File | | No |
| .shp | ESRI Shapefile | | No |
| .shx | Shapefile Index File | | No |
| .skv | Semicolon Separated Values File | | No |
| .skv | XLANG Schedule Drawing File | | No |
| .skx | XLANG Schedule File | | No |
| .sle | Sisulizer Package File | | No |
| .slp | Sisulizer Project File | | No |
| .spo | SPSS Statistical Data Output File | | No |
| .sps | SPSS Program File | | No |
| .spub | Disc Cover File | | No |
| .sq | Sysquake Program | | No |
| .sqd | SQ Data File | | No |
| .sql | Structured Query Language Data | | Yes |
| .sqr | SQL Program File | | No |
| .sta | ABAQUS Status File | | No |
| .stc | StarOffice Calc Spreadsheet Template | | No |
| .stk | Stickfigure Animator File | | No |
| .stl | Fireworks Style Library | | No |
| .stm | Exchange Streaming Media File | | No |
| .str | dBASE Structure List Object File | | No |
| .stw | STATISTICA Workbook | | No |
| .swk | StudyWorks Save File | | No |
| .sxc | StarOffice Calc Spreadsheet | | No |
| .sxi | StarOffice Impress Presentation | | No |
| .t01 | TaxCut 2001 File | | No |
| .t02 | TaxCut 2002 File | | No |
| .t03 | TaxCut 2003 File | | No |
| .t04 | TaxCut 2004 File | | No |
| .tab | Tab Separated Data | | No |
| .tb | Tabbery Tab File | | No |
| .tbk | ToolBook File | | No |
| .tdl | Tab Delineated Format File | | No |
| .tef | TablEdit Tablature | | No |
| .tfa | TreeSoft CashFlow Analysis Data File | | No |
| .tfd | Tape Format Requirements Document | | No |
| .tfrd | Tape Image Format Requirements Document | | No |
| .tjp | TaskJuggler Project File | | No |
| .tkfl | TKLinks Saver Favorite Links File | | No |
| .topc | TopicCrunch Project File | | No |
| .tps | Multi Channel Measurement File | | No |
| .trd | TrID Definitions Package | | No |
| .trs | Rosetta Stone Language Data | | No |
| .tst | TestPoint Test File | | No |
| .tsv | Tab Separated Values File | | No |
| .txd | Game Texture Dictionary | | No |
| .txf | Tax Exchange Format | | No |
| .ulf | Universal List File | | No |
| .ulz | USBlyzer Data Capture File | | No |
| .uvf | Uncertain Value Format | | No |
| .val | Values List | | No |
| .vcd | Value Change Dump File | | No |
| .vcf | vCard File | | No |
| .voi | VOI Group File | | No |
| .vok | PocketVok Vocabulary File | | No |
| .vscontent | Visual Studio Content File | | No |
| .wab | Windows Address Book | | No |
| .wdb | Microsoft Works Database | | No |
| .wfm | dBASE Form | | No |
| .wgt | XNBC Synaptic Weights File | | No |
| .wgt | IMPS Data File | | No |
| .wjr | ReGet Deluxe Data File | | No |
| .wk1 | Lotus Worksheet | | No |
| .wk2 | Lotus 2 Worksheet | | No |
| .wk3 | Lotus 3 Worksheet | | No |
| .wk4 | Lotus 4 Worksheet | | No |
| .wk5 | Lotus 5 Worksheet | | No |
| .wki | Lotus 2 Worksheet | | No |
| .wks | Microsoft Works Spreadsheet | | Yes |
| .wks | Lotus 1-2-3 Spreadsheet | | No |
| .wku | Lotus 1-2-3 Spreadsheet | | No |
| .wmdb | Windows Media Database File | | No |
| .wor | MapInfo Workspace File | | No |
| .wpf | WordPerfect Form | | No |
| .wtr | Encarta File | | No |
| .xdb | PowerDesigner Database Definition File | | No |
| .xdp | XML Data Package | | No |
| .xef | eManager Form Data | | No |
| .xem | PowerDesigner Model definition File | | No |
| .xfo | XSL-FO Formatted Form | | No |
| .xft | Adobe Form Designer 5.0 File | | No |
| .xl | Excel Spreadsheet | | No |
| .xlc | Excel Chart | | No |
| .xlr | Microsoft Works Spreadsheet | | No |
| .xls | Microsoft Excel Spreadsheet | | Yes |
| .xlsb | Excel Binary Workbook | | No |
| .xlsm | Excel 2007 Macro-Enabled Spreadsheet | | No |
| .xlsx | Microsoft Excel Open XML Document | | No |
| .xlt | Microsoft Excel Template | | No |
| .xltm | Excel 2007 Macro-Enabled Spreadsheet Template | | No |
| .xltx | Excel 2007 Spreadsheet Template | | No |
| .xlw | Microsoft Excel Workbook | | No |
| .xml | XML File | | Yes |
| .xmlper | LeCroy Binary Waveform File | | No |
| .xpj | Micro Planner X-Pert Project File | | No |
| .xpm | Micro Planner Manager File | | No |
| .xpt | SAS Transport File | | No |
| .xsl | XML Stylesheet | | No |
| .xslt | XSL Transformation | | No |
| .xsn | InfoPath Form Template File | | No |
| .xtp | XTree Data File | | No |
| .yam | Yahoo! Auctions Data | | No |
| .zap | Zone Alarm Pro Data File | | No |
| .zdb | Quicken Online File | | No |
| .zdb | EPSQ Database | | No |
| .zdc | CD Catalog Expert Database File | | No |
| .zix | Quicken Online File | | No |
| .^^^ | Pervasive SQL Database File | | No |
