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.
.db-journal - SQLite database journal
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 rar - WinRAR RAR compressed archive
file extension mp4 - MPEG-4 video file format
file extension docx - Microsoft Word Open XML document
file extension pdf - Adobe Portable document format
file extension xlsx - Microsoft Excel Open XML workbook and spreadsheet
file extension epub - Open Publication structure e-book
file extension jpg - JPEG bitmap image format
file extension oxps - Microsoft OpenXPS document
file extension dll - Dynamic Link Library
file extension part - Partial download
file extension mp3 - Compressed audio and music file, mp3 songs or ringtones
file extension dwg - AutoCAD drawing
file extension cdr - CorelDRAW vector or bitmap graphics
file extension vsdx - Microsoft Visio drawing
Recently updated file extensions
The file extension database is maintained and improved on daily basis. Here you can check last updated entries.
file extension pi5 - Atari Degas image
file extension odctablefile - Microsoft Office data
file extension oap - Ovation Pro applet
file extension abc - ABC-View Manager thumbnail cache
file extension vvf - Voc vocabulary data
file extension ish1 - Animation-ish Wiggledoodle-ish document
file extension celtx - Celtx project
file extension mys - Vineyard captured video data
file extension ipl - PLATO Web Learning Network (PWLN) temporary data
file extension drl - DocObject resource locator
file extension hsp - HSC composer packed by Number Six audio data
file extension ttx - TabTrax tab data
file extension eqf - PocketMusic preset
file extension dxr - Vegas Jackpot Gold game data
file extension md0 - Adobe Photoshop file browser metadata cache
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