The following tables display file extensions associated with data files, with extensions for the most commonly encountered file formats listed first:
| File Extension |
File Description |
| .1pe |
TurboTax Form File |
| .1ph |
TurboTax File |
| .ade |
Access Project Extension |
| .adp |
Access Project |
| .aft |
Ancestry.com Family Tree Database |
| .ask |
askSam Database |
| .box |
E-mail Mailbox |
| .cdf |
Common Data Format |
| .chg |
Quicken Online Data File |
| .chn |
Ethgraph Data |
| .clp |
Windows Clipboard File |
| .cwk |
Claris Works Document |
| .cws |
Claris Works Template |
| .db2 |
dBASE II Database |
| .dbf |
Database File |
| .dbx |
Visual FoxPro Table |
| .des |
QuickBooks Forms Template |
| .dex |
Excel Spreadsheet |
| .dlg |
Digital Line Graph |
| .dmo |
Derive Demo |
| .e00 |
ArcInfo Coverage Export File |
| .esp |
ACD/Labs Dataset |
| .ess |
EasySpreadsheet Spreadsheet |
| .ev |
Echoview File |
| .evy |
Envoy File |
| .ffd |
Flat File Description |
| .fm |
FileMaker Spreadsheet |
| .fm5 |
FileMaker 5 Database |
| .fmp |
FileMaker Pro Database |
| .fp |
FileMaker Pro File |
| .fp3 |
FileMaker Pro 3 Database |
| .fp4 |
FileMaker Pro 4 Database |
| .fp5 |
FileMaker Pro 5 Database |
| .frl |
Electronic Form Loader |
| .frx |
FoxPro Report |
| .ftw |
Family Tree File |
| .gdb |
InterBase Database |
| .ged |
Genealogical Event Data |
| .gnp |
GNPeak Output File |
| .gra |
Microsoft Graph |
| .grf |
Graph File |
| .grib |
Gridded Binary File |
| .hdf |
Hierarchical Data Format |
| .hif |
Quicken Online File |
| .ib |
InterBase Database |
| .ics |
iCalendar File |
| .inp |
ABAQUS Input File |
| .ivt |
Beyond 20/20 Table |
| .lib |
Generic Data Library |
| .lif |
TurboTax Information Archive |
| .lix |
Logos Library System File |
| .lsf |
Logos Library System File |
| .mbl |
Logger Pro Data |
| .mdn |
Blank Access Database Template |
| .mdt |
Access Database Template |
| .mdx |
Multiple Index File |
| .mdz |
Access Wizard Template |
| .mny |
Microsoft Money File |
| .mth |
Derive Math File |
| .nb |
Mathematica tebook |
| .ns2 |
Lotus tes Database |
| .ns3 |
Lotus tes Database |
| .ns4 |
Lotus tes Database |
| .obj |
Relocatable Object Code |
| .odb |
ABAQUS Database |
| .ods |
OpenDocument Spreadsheet |
| .oo3 |
OmniOutliner 3 File |
| .or4 |
Lotus Organizer 4 File |
| .org |
Lotus Organizer File |
| .ots |
OpenDocument Spreadsheet Template |
| .pab |
Personal Address Book |
| .pan |
Parama Database File |
| .pcap |
Packet Capture |
| .pdb |
Program Database |
| .pds |
Planetary Data System File |
| .pfc |
AOL Personal File Cabinet |
| .pfl |
Family Lawyer Document |
| .pot |
PowerPoint Template |
| .pst |
Personal Folder File |
| .ptk |
Quicken Online Data File |
| .qbb |
QuickBooks Backup File |
| .qbw |
QuickBooks Data File |
| .qdf |
Quicken Data File (Windows) |
| .qdfm |
Quicken Data File (Macintosh) |
| .qif |
Quicken Interchange Format |
| .qpb |
Quicken Payroll File |
| .qpw |
Quattro Pro Spreadsheet |
| .rdf |
Resource Description Framework |
| .rf1 |
Retirement Forecast File |
| .rog |
Roger 2 Input Data File |
| .roi |
Report Object Instance |
| .rpt |
Crystal Reports File |
| .sbf |
SmartBroker Data |
| .sca |
rton AntiVirus Scan File |
| .sdc |
StarOffice Spreadsheet |
| .sdq |
SAS Data File |
| .sgml |
Standard Generalized Markup Language File |
| .spo |
SPSS Statistical Data Output File |
| .sps |
SPSS Statistical Data Document |
| .stc |
tarOffice Spreadsheet Template |
| .sxc |
StarOffice Spreadsheet |
| .t01 |
TaxCut 2001 File |
| .t02 |
TaxCut 2002 File |
| .t03 |
TaxCut 2003 File |
| .t04 |
TaxCut 2004 File |
| .tab |
Tab Separated Data |
| .tbk |
ToolBook File |
| .tsv |
Tab Separated Values |
| .txf |
Tax Exchange Format |
| .val |
Values List |
| .vcf |
vCard File |
| .wab |
Windows Address Book |
| .wdb |
Microsoft Works Database |
| .wfm |
dBASE Form |
| .wk1 |
Lotus Worksheet |
| .wk2 |
Lotus 2 Worksheet |
| .wk3 |
Lotus 3 Worksheet |
| .wk4 |
Lotus 4 Worksheet |
| .wk5 |
Lotus 5 Worksheet |
| .wki |
Lotus 2 Worksheet |
| .wks |
Lotus 1-2-3 Spreadsheet |
| .wku |
Lotus 1-2-3 Spreadsheet |
| .wtr |
Encarta File |
| .xdp |
XML Data Package |
| .xef |
eManager Form Data |
| .xlb |
Excel Worksheet |
| .xlc |
Excel Chart |
| .xlt |
Microsoft Excel Template |
| .xlw |
Microsoft Excel Workbook |
| .xsl |
XML Stylesheet |
| .xslt |
XSL Transformation |
| .yam |
Yahoo! Auctions Data |
| .zap |
Zone Alarm Pro Data File |
| .zdb |
Quicken Online File |
| .zix |
Quicken Online File |
