What are the most used file extensions in Windows

Windows file names have two parts, the name, a period (which separates the name from the file extension), and the extension (suffix). The extension is a three or four character abbreviation placed after the break point. For example, in the file “letter.docx” the word “letter” is the name of the file while “docx” is its extension.

Extensions are important because they tell the computer what type of file it will be, with this information the operating system knows which applications to run to open the file. For example, the .docx extension tells you that the file is a Microsoft Word document file.

If you want to open a file in Windows that was created in Mac OS X, you may need to add a Mac OS X filename extension so that Windows can recognize it.

Here is a list of the most common file extensions in Windows:

Extension Description
AIFF or AIF Audio Interchange File Format
TO Basic Audio
AVI Multimedia Audio/Video
BAT PC batch file
BMP Windows BitMap
CLASS or JAVA Java files
CSK ClarisWorks for Windows
CVS Canvas
DBF dbase II, III, IV data
DIF Data Interchange format
DOC Microsoft Word for Windows/Word97
EPS Encapsulated PostScript
EXE PC Application
FM3 Filemaker Pro databases
GIF Graphics Interchange Format
HQX Macintosh BinHex
HTM or HTML Web page source text
JPG or JPEG JPEG graphic
MAC MacPaint
MAP Web page imagemap
MDB MS Access database
MID or MIDI MIDI sound
MOV or QT QuickTime Audio/Video
MTB or MTW MiniTab
PDF Acrobat -Portable document format
P65 PageMaker
PNG Public Network graphic
PPT PowerPoint
PSD Adobe PhotoShop
PSP PaintShop Pro
QXD QuarkXPress
OUT RealAudio
RTF Rich Text Format
SIT Stuffit Compressed Archive
TAR UNIX TAR Compressed Archive
TIF TIFF graphic
WAV Windows sound
WK3 Lotus 1-2-3
WKS MS Works
WPD or WP5 WordPerfect
XLS Excel spreadsheet
ZIP PC Zip Compressed Archive

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