Common file extensions that are good to know, organized by file format. Text Files.doc.log.msg.rtf.txt.wpd.wps Microsoft Word Document Log File Mail Message Rich Text Format Text File WordPerfect Document Microsoft Works Word Processor Document Data Files.123 Lotus 1-2-3 Spreadsheet.csv.dat.db.dll.mdb.pps.ppt.sql.wks.xls.xml Comma Separated Values File Data File Database File Dynamic Link Library Microsoft Access Database PowerPoint Slide Show PowerPoint Presentation Structured Query Language Data Microsoft Works Spreadsheet Microsoft Excel Spreadsheet XML File Image Files.mng.pct Multiple Network Graphic Picture File Raster Image Files BY Page 1
.bmp.gif.jpeg.jpg.png.psd.psp.tif Bitmap Image Graphical Interchange Format File JPEG Image File JPEG Image File Portable Network Graphic Photoshop Document Paint Shop Pro Image File Tagged Image File Format Vector Image Files.ai.drw.dxf.eps.ps.svg Adobe Illustrator File Drawing File Drawing Exchange Format File Encapsulated PostScript PostScript File Scalable Vector Graphics 3D Image Files.3dm.3dmf Rhino 3D Model QuickDraw 3D Metafile Page Layout Files.indd.pdf.qxd.qxp Adobe InDesign File Portable Document Format File QuarkXpress Document QuarkXpress 6 Project File Audio Files.aac.aif.iff.m3u Advanced Audio Coding File Audio Interchange File Format Interchange File Format Media Playlist File BY Page 2
.mid.midi.mp3.mpa.ra.ram.wav.wma MIDI File MIDI File MP3 Audio File MPEG Audio File Real Audio File Real Audio Media Windows WAVE Sound File Windows Media Audio File Video Files.3gp.asf.asx.avi.mov.mp4.mpg.qt.rm.swf.wmv 3GPP Multimedia File Advanced Systems Format File Microsoft ASF Redirector File Audio Video Interleave File Apple QuickTime Movie MPEG-4 Video File MPEG Video File Apple QuickTime Movie Real Media File Macromedia Flash Movie Windows Media Video File Web Files.asp.css.htm.html.js.jsp.php.xhtml Active Server Page Cascading Style Sheet Hypertext Markup Language File Hypertext Markup Language File JavaScript File Java Server Page Hypertext Preprocessor File Extensible Hypertext Markup Language File BY Page 3
Font Files.fnt.fon.otf.ttf Font File Generic Font File OpenType Font TrueType Font Plugin Files.8bi.plugin.xll Photoshop Plug-in Mac OS X Application Plug-in Excel Add-In File System Files.cab.cpl.dmp.drv.ini.key.sys Windows Cabinet File Windows Control Panel Windows Memory Dump Device Driver Initialization File Security Key System File Settings Files.cfg.msi.reg Configuration File Windows Installer File Registration Information Executable Files.app.bat.cgi.com.exe.pif Mac OS X Application DOS Batch File Common Gateway Interface Script Command File Executable File Program Information File BY Page 4
.vb.ws VBScript File Windows Script Compressed Files.gz.pkg.rar.sea.sit.sitx.zip Gnu Zipped File Mac OS X Installer Package WinRAR Compressed Archive Self-Extracting Archive Stuffit Archive Stuffit X Archive Zipped File Encoded Files.bin.hqx.mim.uue Macbinary II Encoded File BinHex 4.0 Encoded File Multi-Purpose Internet Mail Message Uuencoded File Developer Files.c C/C++ Source Code File.cpp.java.pl C++ Source Code File Java Source Code File Perl Script Backup Files.bak.gho.old.ori.tmp Backup File Norton Ghost Backup File Backup File Original File Temporary File BY Page 5
Disk Files.dmg.iso.toast.vcd Mac OS X Disk Image Disc Image File Toast Disc Image Virtual CD Game Files.gam.nes.rom.sav Saved Game File Nintendo (NES) ROM File N64 Game ROM File Saved Game Misc Files.lnk.torrent.yps File Shortcut BitTorrent File Yahoo! Messenger Data File BY Page 6