A file extension or file name extension is the ending of a file that helps identify the type of file in operating systems, such as Microsoft Windows. In Microsoft Windows, the file name extension is a period that is often followed by three characters, but may also be one, two, or four characters long.
Executable File Extensions
File Extension | File Extension Meaning |
.apk | Android package file |
.bat | Batch file |
.bin | Binary file |
.cgi | Common Gateway Interface Script |
.com | MS-DOS command file |
.exe | Executable file |
.jar | Java Archive file |
.py | Python file |
.wsf | Windows Script File |
Audio File Extensions
File Extension | File Extension Meaning |
.aif | AIF/Audio Interchange audio file |
.cda | CD audio track file |
.iff | Interchange File Format |
.mid or .midi | MIDI audio file. |
.mp3 | MP3 audio file |
.mpa | MPEG-2 audio file |
.wav | WAVE file |
.wma | Windows Media audio file |
.wpl | Windows Media Player playlist |
Video File Extensions
File Extension | File Extension Meaning |
.avi | Audio Video Interleave File |
.flv | Adobe Flash Video File |
.h264 | H.264 video File |
.m4v | Apple MP4 video File |
.mkv | Matroska Multimedia Container |
.mov | Apple QuickTime movie File |
.mp4 | MPEG-4 Video File |
.mpg or .mpeg | MPEG video File |
.rm | Real Media File |
.swf | Shockwave flash File |
.vob | DVD Video Object File |
.wmv | Windows Media Video File |
.3g2 | 3GPP2 Multimedia File |
.3gp | 3GPP multimedia File |
Text File Extensions
File Extension | File Extension Meaning |
.doc and .docx | Microsoft Word file |
.odt | OpenOffice Writer document file |
.msg | Outlook Mail Message |
.pdf | PDF file |
.rtf | Rich Text Format File |
.tex | A LaTeX document file |
.txt | Plain text file |
.wks and .wps | Microsoft Works Word Processor Document file |
.wpd | WordPerfect document |
Spreadsheet File Extensions
File Extension | File Extension Meaning |
.ods | OpenOffice Calc spreadsheet file |
.xlr | Microsoft Works spreadsheet file |
.xls | Microsoft Excel file |
.xlsx | Microsoft Excel Open XML spreadsheet file |
Presentation File Extensions
File Extension | File Extension Meaning |
.key | Keynote presentation |
.odp | OpenOffice Impress presentation file |
.pps | PowerPoint slide show |
.ppt | PowerPoint presentation |
.pptx | PowerPoint Open XML presentation |
Database File Extensions
File Extension | File Extension Meaning |
.accdb | Access 2007 Database File |
.csv | Comma separated value file |
.dat | Data file |
.db or .dbf | Database file |
.log | Log file |
.mdb | Microsoft Access database file |
.pdb | Program Database |
.sav | Save file (e.g. game save file) |
.sql | SQL/Structured Query Language database file |
.tar | Linux / Unix tarball file archive |
System Related File Extensions
File Extension | File Extension Meaning |
.bak | Backup file |
.cab | Windows Cabinet file |
.cfg | Configuration file |
.cpl | Windows Control panel file |
.cur | Windows cursor file |
.dll | DLL file |
.dmp | Dump file |
.drv | Device driver file |
.icns | macOS X icon resource file |
.ico | Icon file |
.ini | Initialization file |
.lnk | Windows shortcut file |
.msi | Windows installer package |
.sys | Windows system file |
.tmp | Temporary file |
Web File Extensions
File Extension | File Extension Meaning |
.asp and .aspx | Active Server Page file |
.cer | Internet security certificate |
.cfm | ColdFusion Markup file |
.cgi or .pl | Perl script file |
.css | Cascading Style Sheet file |
.htm and .html | HTML/Hypertext Markup Language file |
.js | JavaScript file |
.jsp | Java Server Page file |
.part | Partially downloaded file |
.php | PHP Source Code file |
.rss | RSS/Rich Site Summary file |
.xhtml | XHTML / Extensible Hypertext Markup Language file |
Image File Extensions
File Extension | File Extension Meaning |
.ai | Adobe Illustrator file |
.bmp | Bitmap image File |
.gif | GIF/Graphical Interchange Format image |
.ico | Icon file |
.jpeg or .jpg | JPEG image |
.max | 3ds Max Scene File |
.obj | Wavefront 3D Object File |
.png | PNG / Portable Network Graphic image |
.ps | PostScript file |
.psd | PSD / Adobe Photoshop Document image |
.svg | Scalable Vector Graphics file |
.tif or .tiff | TIFF image |
.3ds | 3D Studio Scene |
.3dm | Rhino 3D Model |
Author & Editor
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