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.
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.
.sdtid - RSA soft-token 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 apk - Google Android application package
file extension skp - SketchUp graphics
file extension oxps - Microsoft OpenXPS document
file extension epub - Open Publication structure eBook
file extension numbers - Apple Numbers spreadsheet
file extension crypt12 - WhatsApp Messenger message database
file extension aae - Apple Photos sidecar file
file extension dll - Dynamic Link Library
file extension pages - Pages document
Recently updated file extensions
The file extension database is maintained and improved on daily basis. Here you can check last updated entries.
file extension okt - Oktalyzer music module (MOD)
file extension oga - Ogg Vorbis audio
file extension nst - NoiseTracker music module
file extension nsf - NES sound data
file extension mpu - MPEG Layer 3 audio
file extension mpeg - MPEG movie
file extension mpe - MPEG movie (Motion Pictures Experts Group)
file extension miniusf - Nintendo 64 song file
file extension milk - Winamp MilkDrop plugin configuration data
file extension h_ - Microsoft WinHelp compressed data