File extension or filename suffix is usually three, four or more characters at the end of computer file names divided by a dot.
File extensions are useful to computer programs and operating systems like Windows or OS X, and basically telling them, what kind of data and file type they are working with and what associated program opens this file.
File-extensions.org library contains thousands of file extensions and the database is still growing.
A large number of file type entries have detailed descriptions, including their current use and the list of programs that can open, view, edit, convert or play unknown file you search for.
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File extension of the day
Random daily pick from file-extensions.org database.
.nbf - Backup NOW! backup archive 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.
file extension pdf - Adobe Portable document format
file extension flac - Audio files encoded by Flac - free lossless audio codec
file extension part - Partial download file
file extension epub - Open Publication structure eBook file
file extension pages - iWork Pages document file
file extension rar - WinRAR RAR compressed archive
file extension 3ga - Audio file for wireless networks
file extension pub - Microsoft Publisher document file
file extension mobi - Mobipocket eBook Format
file extension apk - Google Android package file
file extension 002 - Compressed file from a multi-volume archive (part 2)
file extension gadget - Windows sidebar gadget file
file extension dwg - AutoCAD Drawing file
file extension json - Mozilla Firefox bookmark backup file
file extension menc - Microsoft Windows Mobile encrypted file
file extension xlsx - Microsoft Excel 2007, Excel 2010 and Excel 2013 Open XML workbook file
file extension 264 - H.264/MPEG-4 AVC video file
file extension dlc - JDownloader download link container
file extension bin - CD/DVD binary image file
file extension xls - Microsoft Excel 97 to 2003 workbook file
Recently updated file extensions
Existing and new file extensions are updated or added very often. The database is maintained and improved every day.
file extension sdi - Interface definition file
file extension sdi - System Deployment Image file
file extension opf - Obsidium project file
file extension sdi - ArcGIS spatial and attribute index file
file extension png8 - 8bit Portable Network Graphics file
file extension sdi - SeeYou flight data
file extension pzp - Pizazz Plus palette file
file extension sdi - Smart Diary Suite index
file extension t2k - VISIA image file
file extension tdf - TheDraw font
file extension sdi - SteelPac Data Interchange File
file extension vl2 - Tribes 2 game file
file extension wss - ReliaSoft RGA file
file extension xs - Age of Empires 3 Map AI generator file
file extension sdi - Borland single document interface
file extension xs - Hummingbird Exceed file
file extension sdi - Fidonet Software Distribution Network Info file
file extension sdi - QuickBooks data file
file extension zgp - Zelda Classic Graphics Pack
file extension svp - Sonique visual plug-in file