File extension is usually three or more characters at the end of the computer file name. File extensions are useful for computer operating systems, like Microsoft Windows or Apple MAC OS X, and basicaly tell them, what kind of data file it is and with which application associated it is.
We have collected a huge amount of informations and created searchable file extension list. At present the File-Extensions.org library contains thousands of file extensions and with each day the database is growing. A large number of file type entries have detailed descriptions, including their current use and a list of applications associated with it and which can handle the unknown file type, you were searching for.

If you encounter a file in your computer with an unknown file extension, then you are at the right place. You can check our database for informations about file extension you were looking for, including list of associated applications.
Simply use the search box at the top-left corner of each page to check our database for a specific file extension. You may also browse our database in alphabetical order using the navigation menu at the top.

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Check out the recently published articles related to file extensions, tutorials or software reviews.

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File extension of the day

Random daily pick from file-extensions.org database.

pwi file icon.pwi - Microsoft Office Mobile personal note file

For an overview of common file types,
visit the common file extensions page, which includes a list of the most important computer file formats you should know.

Popular file extensions

List of the most visited file extension records. Click on the link below for more details and software associations.

pdf file extension icon file extension pdf - Adobe Portable document format

flac file extension icon file extension flac - Audio files encoded by Flac - free lossless audio codec

default file extension icon file extension part - Partial download file

epub file extension icon file extension epub - Open Publication structure eBook file

pages file extension icon file extension pages - iWork Pages document file

rar file extension icon file extension rar - WinRAR RAR compressed archive

default file extension icon file extension 3ga - Audio file for wireless networks

pub file extension icon file extension pub - Microsoft Publisher document file

default file extension icon file extension mobi - Mobipocket eBook Format

002 file extension icon file extension 002 - Compressed file from a multi-volume archive (part 2)

apk file extension icon file extension apk - Android package file

gadget file extension icon file extension gadget - Windows sidebar gadget file

dwg file extension icon file extension dwg - AutoCAD Drawing file

menc file extension icon file extension menc - Microsoft Windows Mobile encrypted file

json file extension icon file extension json - Mozilla Firefox bookmark backup file

xlsx file extension icon file extension xlsx - Microsoft Excel 2007/2010 Open XML workbook file

264 file extension icon file extension 264 - H.264/MPEG-4 AVC video file

dlc file extension icon file extension dlc - JDownloader download link container

bin file extension icon file extension bin - CD/DVD binary image file

xls file extension icon file extension xls - Microsoft Excel 97 to 2003 workbook file

001 file extension icon file extension 001 - Compressed file from a multi-volume archive (part 1)

cbr file extension icon file extension cbr - Comic Book Archive file or ComicBook Reader file

crx file extension icon file extension crx - Google Chrome extension installer file format

nrg file extension icon file extension nrg - Nero-Burning ROM CD or DVD image file

003 file extension icon file extension 003 - Compressed file from a multi-volume archive (part 3)

srt file extension icon file extension srt - SubRip video subtitle format

7z file extension icon file extension 7z - 7-ZIP compressed 7z archive file

vmdk file extension icon file extension vmdk - VMware virtual disk file

nbu file extension icon file extension nbu - Nokia PC Suite 6.82+ backup file

wps file extension icon file extension wps - Microsoft Works document file

Recently updated file extensions

Existing and new file extensions are updated or added very often. The database is maintained and improved every day.

default file extension icon file extension part - Partial download file

default file extension icon file extension sublime-workspace - Sublime Text workspace settings file

default file extension icon file extension sublime-project - Sublime Text project file

default file extension icon file extension smali - Google Android Smali Assembly Language developer file

default file extension icon file extension mdown - Markdown markup language file

default file extension icon file extension xlsx - Microsoft Excel 2007/2010 Open XML workbook file

default file extension icon file extension ff9 - Acorn RISC OS bitmap image sprite file

default file extension icon file extension as2 - ACTIVstudio resource file

default file extension icon file extension kcl - KeywordConvert keyword phrase list

default file extension icon file extension video - aTube Catcher video file

default file extension icon file extension flvat - Downloaded Flash video file

default file extension icon file extension sav - Configuration data file

default file extension icon file extension sav - Free Download Manager download data file

default file extension icon file extension sav - Saved game file

default file extension icon file extension sav - SPSS Data Sets database file

default file extension icon file extension flv - Flash video file

default file extension icon file extension sqfs - SquashFS bootable file

default file extension icon file extension led - Sony AIBO AIBO LED File Format

default file extension icon file extension edt - Adobe Ebook download settings file

default file extension icon file extension ruf - Samsung DVD and Blu-ray player firmware file

default file extension icon file extension fpbf - Mac OS X Finder Burnable Backup Archive

default file extension icon file extension ccip - Curse Client 4 addon download protocol file

default file extension icon file extension vmlt - VMLF related file

default file extension icon file extension partial - Microsoft Internet Explorer 9 partial download file

default file extension icon file extension pdu - Protocol data unit message file

default file extension icon file extension qct - QuarkXpress article template file

default file extension icon file extension gcf - Steam Client Grid Cache file

default file extension icon file extension mbp - MyBackup Pro database file

default file extension icon file extension aed - Alphacam wire EDM drawing file

default file extension icon file extension dicm - Medicine image file

Enter any file extension without dot (e.g. doc)
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