Types of file extensions
General:
*.exe Application
*.bat MS-DOS Batch file
*.com MS-DOS Application
*.dll System Extension
*.msi Windows Installer Package
*.msp Windows Installer Patch
*.sys System File
*.cpl Control Panel Extension
*.386 Virtual Device Driver
*.vxd Virtual Device Driver
*.scr Screen Saver
*.inf Setup Information
*.ini Configuration Settings
*.msc Microsoft Common Console
*.reg Registry Entries
*.key Registry Entries
*.icc/*.icm Microsoft Color Profile
Text:
*.doc Microsoft Word Document(Old)
*.docx Microsoft Word Document(New)
*.txt Text Document
*.rtf Rich Text Document
*.odt OpenDocument Text
*.pdf Adobe Acrobat Document
Graphics:
*.emf EMF File
*.bmp Bitmap
*.jpg/*.jpeg JPEG Image
*.gif Graphics Interchange Format
*.tiff Tagged Image File Format
*.png Portable Network Graphics
*.ico Icon
*.wmf Windows Metafile
*.msp Windows 1.0/2.0 Paint File
*.pcx Paintbrush Picture
*.psd PhotoShop Document
Audio:
*.wav Wave Audio
*.mp3 MP3 Audio
*.wma Windows Media Audio
*.au Audio
*.mid/*.midi MIDI Audio
*.aif/*.aiff AIFF Audio File
*.flac FLAC Audio
*.ac3 AC3 Audio
Video:
*.avi Video Clip
*.wmv Winjdows Media Video
*.mpg/*.mpeg Movie Clip
*.3gp 3GP Video
*.mp4 MP4 Video
*.mov QuickTime movie
*.asf Windows Media File
*.flv Flash Video
*.dat Video CD file
*.dvr/*.dvr-ms Recorded TV Show
Animations:
*.swf Flash Movie
*.dir Director Movie
*.swi Swish Animation
Disc Images:
*.iso ISO Image
*.ccd CloneCD Image
*.nrg Nero Disc Image
*.cue CUE Image
*.bin BIN file
*.img Image file
Archives:
*.zip WinZIP compressed folder
*.cab Cabinet
*.rar WinRAR archive
*.7z 7-Zip file
Cursors:
*.cur Static cursor
*.ani Animated cursor
Virtualisation:
*.vmc Virtual PC machine
*.vhd Virtual PC virtual hard disk
*.vbox VirtualBox virtual machine
*.vdi VirtualBox hard disk
*.vmdk VMware hard disk
Others:
*.xls Microsoft Excel Spreadsheet(Old)
*.xlsx Microsoft Excel Spreadsheet(New)
*.ppt Microsoft PowerPoint Presentation(Old)
*.pptx Microsoft PowerPoint Presentation(New)
*.pps Microsoft PowerPoint Show(Old)
*.ppsx Microsoft PowerPoint Show(New)
*.htm/*.html HTML Document
*.mht/*.mhtml MHTML Document
*.lnk Shortcut
*.url Internet Shortcut
*.mmm Media Player File
*.vfd Virtual PC floppy image
*.fla Flash Documuent
*.gm6 Game Maker 6 File
*.gmk Game Maker 7/8 File
*.gm81 Game Maker 8.1 File
*.chm HTML Help file
*.hlp Old Windows Help File(Available for Windows Vista/7/8 by installing from the website)
*.skype Skype Content
*.acl AutoCorrect List File
*.air Adobe Air Application Installer