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 macOS (OS X), and basically telling them, what kind of data and file type they are working with and what associated program opens the 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.
Latest articles
Check out the recently published articles related to file extensions, tutorials or software tips.
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Begin your search by entering the source and target file type specified by their file extensions. For example simply try flac to mp3.
File extension of the day
Random daily pick from File-Extensions.org's database.
.doc - Microsoft Word document (prior version 2007)
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 apk - Google Android application package
file extension pdf - Adobe Portable document format
file extension numbers - Apple Numbers spreadsheet
file extension pages - Pages document
file extension jpg - JPEG bitmap image format
file extension oxps - Microsoft OpenXPS document
file extension mp3 - Compressed audio and music file, mp3 songs or ringtones
file extension part - Partial download
file extension cdr - CorelDRAW vector or bitmap graphics
file extension rar - WinRAR RAR compressed archive
file extension mp4 - MPEG-4 video file format
file extension docx - Microsoft Word Open XML document
file extension srt - SubRip video subtitle format
file extension json - JavaScript object notation data interchange format
file extension crypt12 - WhatsApp Messenger message database
Recently updated file extensions
The file extension database is maintained and improved on daily basis. Here you can check last updated entries.
file extension sdc - ESRI SDC dataset
file extension mag - Fortis and file magic document
file extension stxt - Sealed text document
file extension pmm - MikuMikuDance PolygonMovieMaker data
file extension rsd - Roland sound
file extension astx - Adobe Story exported script
file extension pcds - Multi-resolution bitmap graphics - Kodak Photo-CD format
file extension ext2 - Linux second extended file system
file extension tsn - RatLab toolkit data
file extension lnf - oyoaha lookandfeel interface elements data
file extension eil - Eagle library intermediate data
file extension jtb - JTB JavaCC grammar data
file extension vdproj - Microsoft Visual Studio Visual C++ deployment project
file extension sqlproj - Microsoft Visual Studio SQL server project
file extension clu - Broken Sword 2 dialogue data
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