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File extension list

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File extensions are used by Windows, Macintosh, and now sometimes GNU/Linux operating systems to determine how each file should be used. This is a list of some such file extensions.

List

#

Extension Description Used By Operating System(s)
!BT Incomplete BitTorrent download file[1] BitTorrent
!QB Incomplete qBittorrent download file[2] qBittorrent
!UT Incomplete uTorrent download file[3] uTorrent
7Z 7-Zip Compressed file uTorrent

A

Extension Description Used By Operating System(s)
ABW Document AbiWord
ACCDB Database file Microsoft Access (some versions)
AES Encrypted file (Advanced Encryption Standard)
APP Application Mac OS X
AVI Multimedia file

B

Extension Description Used By Operating System(s)
BAT Windows Command-line batch job file Command Prompt Windows
BMP Bitmap image file

C

Extension Description Used By Operating System(s)
CAB Cabinet file - file archive used for multiple purposes Windows and Windows Mobile (readable on Mac and GNU/Linux)
CFG Program configuration file Windows & GNU/Linux
CMD Windows Command-line batch job file Command Prompt Windows
CPL Windows Control Panel Item Windows Explorer Windows
CPP C++ source code file Visual Studio, Eclipse, and other compilers
CSS Cascading Style Sheet for websites or datasheet/file for minority program(s) Web browsers All major systems
CUR Cursor file Windows

D

Extension Description Used By Operating System(s)
DAT Data file for an OS or program, not for direct user access Windows
DB Database
DBF Database
DOC Document file Microsoft Word, Open Office, AbiWord, etc.
DOCX Document file in the form of compressed XML Microsoft Word

E

Extension Description Used By Operating System(s)
EPUB Open XML-based e-book
EXE Executable file (Binary) Windows

F

Extension Description Used By Operating System(s)
FLV Flash Video Adobe Flash Player
FMT Format file WinRAR and FoxPro
FNT Font file Windows
FON Generic Font File

G

Extension Description Used By Operating System(s)
GADGET Desktop Gadget Windows
GIF Graphics Interchange Format image file
GMO GNU machine object file GNU/Linux

H

Extension Description Used By Operating System(s)
H Header source code file for C, C++ or Objective-C[4] Microsoft Visual Studio, text editors, Eclipse IDE for C Developers, etc Windows, Mac, GNU/Linux
HTM Hypertext Markup Language Web browsers All major systems
HTML Hypertext Markup Language Web browsers All major systems

I

Extension Description Used By Operating System(s)
ICO Icon file (image)
INI Initialization file
ISO File archive, generally used to store optical disk "images"

J

Extension Description Used By Operating System(s)
JAR Java archive file used by the Java Runtime Environment (JRE) Java
JAVA Java source code file Java
JPE Joint Photographic Experts Group compression standard image file
JPEG Joint Photographic Experts Group compression standard image file
JPG Joint Photographic Experts Group compression standard image file
JS JavaScript File
JSP Java Server Page file

K

Extension Description Used By Operating System(s)
KDZ Virus definition file Kaspersky
KEY Keynote Presentation (or, in rare cases, a program's registration file) Windows & Mac

L

Extension Description Used By Operating System(s)
LNK Shortcut to local file for web address
LOG Program or system log file
LTX LaTeX Source Document

M

Extension Description Used By Operating System(s)
MD5 MD5 checksum file
MDB Database Microsoft Access
MKV Video container file VLC media player, etc.
MOBI E-book file
MOV Video file Apple QuickTime
MP3 MPEG audio stream (layer 3) file
MPA MPEG Layer II compress
MSG E-mail message Microsoft Outlook

N

Extension Description Used By Operating System(s)
NK NUKE Script

O

Extension Description Used By Operating System(s)
ODF Open Document Format Open Office & LibreOffice
OTF OpenType Font file

P

Extension Description Used By Operating System(s)
PAGES Document
PDB Program database or E-book file Windows, Palm OS, most E-readers
PDF Portable Document Format Adobe Reader, Adobe Acrobat Windows, Mac OS
PHP Hypertext Preprocessor code Most web browsers Major systems
PNG Portable Network Graphics image
PRC Executable file (Palm OS) or 3D models and assemblies file (Adobe)
PTT Presentation file Microsoft Powerpoint, OpenOffice, WPS Office, etc.
PTTX Presentation file Microsoft Powerpoint, WPS Office, etc.
PUB Publication file Microsoft Publisher


Q

Extension Description Used By Operating System(s)
QVM Q Virtual Machine

R

Extension Description Used By Operating System(s)
RAR Compressed archive file WinRAR, 7-Zip, PeaZip, etc Wincows, Mac, GNU/Linux, Android
RTF Rich Text file WordPad, Microsoft Word, Open Office, etc
RSS Rich Site Summary
RUN Executable file Mac OS

S

Extension Description Used By Operating System(s)
SVG Scalable Vector Graphics file
SWF Video/animation file which can be interactive (using ActionScript) Adobe Shockwave Windows
SYS System file Windows

T

Extension Description Used By Operating System(s)
TAR Consolidated Unix file archive GNU/Linux
TEX LaTeX source document
TTF TrueType font file Mac & Windows
TXT Plain text file

U

Extension Description Used By Operating System(s)
UFO Graphics file
URL Web address shortcut

V

Extension Description Used By Operating System(s)
VBS Visual Basic Script Windows
VOB Video Object Optical media disks

W

Extension Description Used By Operating System(s)
WAV Audio file (Microsoft Windows RIFF WAVE) Windows Media Player, VLC, etc. All major systems
WMV Windows Media video file Windows media Player, VLC, etc. All major systems
WPD WordPerfect Document, a proprietary Corel format

X

Extension Description Used By Operating System(s)
XCF Image file GIMP
XHTML Extensible Hypertext Markup Language file
XLS Spreadsheet file Microsoft Excel, Open Office, LibreOffice, etc
XLSM Open XML Macro-Enabled Spreadsheet[5] Microsoft Excel
XLSX Spreadsheet file (Compressed XML) Microsoft Excel, WPS Office, etc
XML Extensible Markup Language - data transfer file
XPS Page Layout File (similar to PDF, replaced EMF)[6] Windows, Mac, GNU/Linux

Y

Extension Description Used By Operating System(s)
YC Archive file

Z

Extension Description Used By Operating System(s)
ZABW Gzip compressed XML document AbiWord
ZIP Compressed (Zipped) folder 7-Zip, WinZip, Pea Zip, etc. Mac & Windows
ZIPX Extended Zip File 7-Zip, WinZip, Pea Zip, etc. Windows, Mac, GNU/Linux, Android

References

  1. ↑ http://dotwhat.net/safeurl/10878
  2. ↑ https://x64.us/s-217162-file-extension
  3. ↑ http://fileinfo.com/extension/!ut
  4. ↑ http://fileinfo.com/extension/h
  5. ↑ http://fileinfo.com/extension/xlsm
  6. ↑ http://fileinfo.com/extension/xps
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