Common File Extensions

Abridged from http://www.fileinfo.com/filetypes/common

Common File Types

Common file extensions that are good to know, organized by file format.

Text Files

.doc	Microsoft Word Document
.docx	Microsoft Word Open XML Document
.odt	OpenDocument Text Document
.pages	Pages Document
.rtf	Rich Text Format File
.txt	Plain Text File

Data Files
.csv	Comma Separated Values File
.dat	Data File
.key	Keynote Presentation
.keychain	Mac OS X Keychain File
.ppt	PowerPoint Presentation
.vcf	vCard File - Address Book File
.xml	XML File

Audio Files
.aif	Audio Interchange File Format
.m3u	Media Playlist File
.m4a	MPEG-4 Audio File
.mid	MIDI File
.mp3	MP3 Audio File
.wav	WAVE Audio File
.wma	Windows Media Audio File

Video Files
.3gp	3GPP Multimedia File
.avi	Audio Video Interleave File
.flv	Flash Video File
.m4v	iTunes Video File - SAME AS MP4
.mov	Apple QuickTime Movie
.mp4	MPEG-4 Video File - SAME AS M4V
.mpg	MPEG Video File
.srt	SubRip Subtitle File
.swf	Shockwave Flash Movie
.vob	DVD Video Object File
.wmv	Windows Media Video File

Raster Image Files
.bmp	Bitmap Image File
.gif	Graphical Interchange Format File
.jpg	JPEG Image
.png	Portable Network Graphic
.psd	Adobe Photoshop Document
.tif	Tagged Image File
.tiff	Tagged Image File Format

Vector Image Files
.ai	Adobe Illustrator File
.eps	Encapsulated PostScript File
.ps	PostScript File
.svg	Scalable Vector Graphics File

Page Layout Files
.pdf	Portable Document Format File

Spreadsheet Files
.xlr	Works Spreadsheet
.xls	Excel Spreadsheet
.xlsx	Microsoft Excel Open XML Spreadsheet

Database Files
.db	Database File
.dbf	Database File
.mdb	Microsoft Access Database
.sql	Structured Query Language Data File

Executable Files
.apk	Android Package File
.app	Mac OS X Application [Executable File]
.bat	DOS Batch File
.exe	Windows Application [Executable File]
.jar	Java Archive File

Game Files
.dem	Video Game Demo File
.gam	Saved Game File
.nes	Nintendo (NES) ROM File
.rom	N64 Game ROM File
.sav	Saved Game

Web Files
.asp	Active Server Page
.aspx	Active Server Page Extended File
.cer	Internet Security Certificate
.cfm	ColdFusion Markup File
.csr	Certificate Signing Request File
.css	Cascading Style Sheet
.htm	Hypertext Markup Language File
.html	Hypertext Markup Language File
.js	JavaScript File
.jsp	Java Server Page
.php	PHP Source Code File
.rss	Rich Site Summary
.xhtml	Extensible Hypertext Markup Language File

Plugin Files
.crx	Chrome Extension
.plugin	Mac OS X Plug-in

Font Files
.fnt	Windows Font File
.fon	Generic Font File
.otf	OpenType Font
.ttf	TrueType Font

Compressed Files
.pkg	Mac OS X Installer Package
.rar	WinRAR Compressed Archive
.tar.gz	Compressed Tarball File
.zip	Zipped File

Disk Image Files
.bin	Binary Disc Image
.dmg	Mac OS X Disk Image
.iso	Disc Image File

Developer Files
.c	C/C++ Source Code File
.class	Java Class File
.cpp	C++ Source Code File
.cs	Visual C# Source Code File
.dtd	Document Type Definition File
.fla	Adobe Flash Animation
.h	C/C++/Objective-C Header File
.java	Java Source Code File
.lua	Lua Source File
.m	Objective-C Implementation File
.pl	Perl Script
.py	Python Script
.sh	Bash Shell Script
.sln	Visual Studio Solution File
.swift	Swift Source Code File
.vcxproj	Visual C++ Project
.xcodeproj	Xcode Project

Backup Files
.bak	Backup File
.tmp	Temporary File

Misc Files
.crdownload	Chrome Partially Downloaded File
.ics	iCalendar File
.msi	Windows Installer Package
.part	Partially Downloaded File
.torrent	BitTorrent File