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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- Best programs for finding duplicate files - Programs for file duplicity searches
- How to open pkpass file - Additional information about pkpass files and how to open and convert them
- Search file extensions from Windows context menu - Directly search File-Extensions.org's database by single click from Windows context menu upon an unknown file
- Show and hide file extensions in Windows 10
- More information about CRDOWNLOAD files - CRDOWNLOAD file analysis.
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.
.rgss3a - RPG Maker VX RGSS version 3 encrypted archive
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 mp4 - MPEG-4 video file format
file extension rar - WinRAR RAR compressed archive
file extension jpg - JPEG bitmap image
file extension exe - Program executable
file extension docx - Microsoft Word Open XML document
file extension mp3 - Compressed audio and music file, mp3 songs or ringtones
file extension ris - Research Information Systems citation
file extension xlsx - Microsoft Excel Open XML workbook and spreadsheet
file extension download - Chrome partial download
file extension part - Partial download
file extension rpt - Report
file extension xapk - Google Android XAPK application package
file extension crdownload - Google Chrome incomplete download
Recently updated file extensions
The file extension database is maintained and improved on daily basis. Here you can check last updated entries.
file extension piv - Pivot Stickfigure Animator animation file
file extension xoj - Xournal journal data
file extension edi - EDI Engine Electronic Data Interchange format
file extension rss - Really Simple Syndication - RSS file format
file extension mm - Apple Xcode core Objective-C program source code
file extension xml-prev - VirtualBox XML settings backup
file extension aee - ASUS Data Security Manager protected data
file extension wotreplay - World of Tanks battle replay
file extension 016 - Split file or Compressed file from a multi-volume archive (part 16)
file extension 31 - Creo Elements/Pro versioned data
file extension excel - Microsoft Excel spreadsheet
file extension 3dm - 3DML model
file extension aedt - ANSYS Electronics Desktop data
file extension swidtag - Software Identification Tag
file extension hsf - HOOPS 3D graphics
