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.
.fna - FASTA DNA and protein sequence alignment
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 rar - WinRAR RAR compressed archive
file extension mp4 - MPEG-4 video file format
file extension jpg - JPEG bitmap image
file extension docx - Microsoft Word Open XML document
file extension xlsx - Microsoft Excel Open XML workbook and spreadsheet
file extension epub - Open Publication structure e-book
file extension mp3 - Compressed audio and music file, mp3 songs or ringtones
file extension part - Partial download
file extension xapk - Google Android XAPK application package
file extension oxps - Microsoft OpenXPS document
file extension ris - Research Information Systems citation
file extension exe - Program executable
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 asf - Advanced Systems (streaming) format
file extension mcmeta - Minecraft animation settings
file extension camrec - Camtasia Studio video recording (version 8.3 or earlier)
file extension 4 - Salt Lake Winter Olympics game music data
file extension ifo - DVD movie information file format
file extension job - Microsoft Windows Task Scheduler task object
file extension r44 - Split Multi-volume RAR compressed file archive (part 46)
file extension 7z.004 - Split Multi-volume 7-ZIP compressed file archive (part 4)
file extension thumbdata5--1967290299_4 - Android thumbnail index
file extension a01 - Split Multi-volume ARJ compressed file archive (part 3)
file extension m4v - MPEG-4 video file format
file extension odp - OpenOffice.org OpenDocument presentation
file extension max - PaperPort scanned document
file extension c2v - WellSight Systems license information file
file extension 7z.003 - Split Multi-volume 7-ZIP compressed file archive (part 3)
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