File extension list

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. Note that some operating systems are case-sensitive, while others are case-insensitive. All are listed here in upper case, but may be only usable in lower case on some systems.

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  |  |
|  |  |
ABM  |  Album of Music or images[4] |  |
ABW |  Document  |  AbiWord |
ACCDB  |  Database file  |  Microsoft Access (some versions)  |
AES  |  Encrypted file (Advanced Encryption Standard)  |  |
APP  |  Application  |  |  Mac OS X
ASP  |  Server-generated web page (HTML)  |  Web browsers  |
ASPX  |  Microsoft's server-generated web page (HTML)  |  Web browsers  |
AVI  |  Multimedia file  |  |
|  |  |
BAK  |  Backup file  |  |
BAT  |  Windows Command-line batch job file |  Command Prompt  |  Windows
BIN  |  Binary Disc Image (compressed)[5] |  |
BMP  |  Bitmap image file  |  |
|  |  |
C  |  C/C++ Source Code file  |  |  Windows, Mac, GNU/Linux
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
|  |  |
DAT  |  Data file for an OS or program, not for direct user access  |  |  Windows
DB  |  Database  |  |
DBF  |  Database  |  |
DMG |  Disk Image  |  |  Mac OS X
DOC |  Document file  |  Microsoft Word, Open Office, AbiWord, etc.  |
DOCX |  Document file in the form of compressed XML  |  Microsoft Word 2007 and above, LibreOffice, OpenOffice,[6] Kingsoft (WPS) Writer  |
DSK  |  Disk Image file, often compressed  |  PowerISO, SoftAmbulance Partition Doctor, Apple Disk Utility, etc.  |  Windows, Mac
DWT  |  Dynamic Web Template (or sometimes, Dreamweaver Template)  |
|  |  |
EPS  |  Encapsulated PostScript file  |  |
EPUB  |  Open XML-based e-book  |  |
EXE |  Executable file (Binary)  |  |  Windows
|  |  |
FLA  |  Adobe Flash Animation  |  Adobe Flash Player  |
FLAC  |  Open-source lossless audio[7] |  |
FLV  |  Flash Video  |  Adobe Flash Player  |
FMT  |  Format file  |  WinRAR and FoxPro
FNT  |  Font file  |  |  Windows
FON  |  Generic Font File  |
|  |  |
GADGET  |  Desktop Gadget  |  |  Windows
GIF |  Graphics Interchange Format image file  |  |
GMO  |  GNU machine object file  |  |  GNU/Linux
|  |  |
H  |  Header source code file for C, C++ or Objective-C[8] |  Microsoft Visual Studio, text editors, Eclipse IDE for C Developers, etc.  |  Windows, Mac, GNU/Linux
HQX  |  BinHex 4.0 Encoded File[9] |  |  Macintosh
HTM  |  Hypertext Markup Language  |  Web browsers  |  All major systems (formerly all DOS systems)
HTML  |  Hypertext Markup Language  |  Web browsers  |  All major systems (formerly UNIX systems)
|  |  |
ICO  |  Icon file (image)  |  |
ICS  |  Calendar item file  |  Microsoft Outlook, Google Calendar, Apple Calendar, etc.  |  Windows, Mac, GNU/Linux
INF  |  Text file which defines what files are installed and sometimes the location they should be saved  |  Windows OS and some program installers  |  Windows
INI  |  Initialization file  |  |  Windows
ISO  |  File archive, generally used to store optical disk "images"  |  PowerISO, BurnAware, InfraRecorder, etc.  |
|  |  |
JAR  |  Java archive file  |  Java Runtime Environment (JRE)  |
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  |  |
|  |  |
KDZ  |  Virus definition file  |  Kaspersky |
KEY  |  Keynote Presentation (or, in rare cases, a program's registration file) |  |  Windows & Mac
|  |  |
LNK  |  Shortcut to local file for web address  |  |  Windows
LOG |  Program or system log file  |  |
LTX  |  LaTeX Source Document  |  |
|  |  |
MD5  |  MD5 checksum file  |  |
MDB  |  Database  |  Microsoft Access  |
MDF  |  Media Disc Image File  |  |
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  |
MSI  |  Windows Installer package  |  |  Windows
|  |  |
NK  |  NUKE Script  |  |
|  |  |
ODF |  Open Document Format  |  Open Office & LibreOffice |
OTF  |  OpenType Font file  |  |
|  |  |
PAGES  |  Document  |  |
PART  |  Partially downloaded/saved file  |  |
PCT  |  Picture (Bitmap format[10]) |  |
PDB  |  Program database or E-book file  |  |  Windows, Palm OS, most E-readers
PDF |  Portable Document Format |  Adobe Reader, Adobe Acrobat |  Windows, Mac OS
PEA |  |  PeaZip |
PHP  |  Hypertext Preprocessor code  |  Most web browsers  |  Major systems
PL  |  Perl Script  |  |
PNG  |  Portable Network Graphics image  |  |
PRC  |  Executable file (Palm OS) or 3D models and assemblies file (Adobe)  |  |
PSD  |  Adobe Photoshop document  |  Adobe Photoshop |
PTT  |  Presentation file  |  Microsoft PowerPoint, OpenOffice, WPS Office, etc.  |
PTTX  |  Presentation file  |  Microsoft PowerPoint, WPS Office, etc.  |
PUB  |  Publication file  |  Microsoft Publisher  |
PY  |  Python Script  |  |
|  |  |
QVM  |  Q Virtual Machine  |  |
|  |  |
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
|  |  |
SVG  |  Scalable Vector Graphics file  |  |
SWF  |  Video/animation file which can be interactive (using ActionScript)  |  Adobe Shockwave  |  Windows
SYS  |  System file  |  |  Windows
|  |  |
TAR  |  Consolidated Unix file archive  |  |  GNU/Linux
TEX  |  LaTeX source document  |  |
TMP  |  Temporary file  |  |
TOAST  |  Toast Disc Image  |  Roxio  |  Mac
TORRENT  |  Peer-to-Peer Torrent download file  |  |
TTF  |  TrueType font file  |  |  Mac & Windows
TXT |  Plain text file  |  |
|  |  |
UFO  |  Graphics file  |  |
URL  |  Web address shortcut  |  |
|  |  |
VBS  |  Visual Basic Script  |  |  Windows & Mac
VCD  |  Virtual CD  |  |  Windows
VOB  |  Video Object  |  Optical media disks  |
|  |  |
WAV  |  Audio file (Microsoft Windows RIFF WAVE)  |  Windows Media Player, VLC, etc.  |  All major systems
WIM  |  Disk Image file  |  |  Windows
WMV  |  Windows Media video file  |  Windows media Player, VLC, etc.  |  All major systems
WPD  |  WordPerfect Document, a proprietary Corel format  |  |
WPS |  Microsoft Works Document  |  |
|  |  |
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[11] |  Microsoft Excel  |
XLSX |  Spreadsheet file (Compressed XML)  |  Microsoft Excel, WPS Office, etc.  |
XML  |  Extensible Markup Language  |  |
XPS  |  Page Layout File (similar to PDF, replaced EMF)[12] |  |  Windows, Mac, GNU/Linux
|  |  |
YC  |  Archive file  |  |
|  |  |
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[edit]

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/abm
5. ↑ http://file.org/extension/bin
6. ↑ http://fileinfo.com/extension/docx
7. ↑ http://www.file-extensions.org/flac-file-extension
8. ↑ http://fileinfo.com/extension/h
9. ↑ http://pcsupport.about.com/od/fileextensions/f/hqxfile.htm
10. ↑ http://www.file-extensions.org/pct-file-extension
11. ↑ http://fileinfo.com/extension/xlsm
12. ↑ http://fileinfo.com/extension/xps