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.
.SC2Replay - Starcraft 2 game replay
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 part - Partial download
file extension mp3 - Compressed audio and music file, mp3 songs or ringtones
file extension dll - Dynamic Link Library
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 schdoc - Altium Designer schematic capture binary data
file extension demo - VirtuaGirl HD model demo
file extension rvf - RichView document
file extension rpyb - Ren'Py bytecode
file extension ec4 - EPSON Print CD document
file extension twf - ArcView world coordinates
file extension nwd - NavisWorks snapshot
file extension sib - Sibelius music notation
file extension jnlp - Java Network Launching Protocol settings
file extension ptb - Peachtree Complete Accounting backup
file extension zix - WinZix compressed archive
file extension appxbundle - Microsoft Windows app bundle package
file extension qdf - Quicken financial data
file extension rfa - Autodesk Revit Architecture family data
file extension ndx - ArcView fonts index
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