Common Filename Extensions
Filenames (e.g.: song.mp3, letter.doc, logo.gif) consiste of three parts:
- the name (e.g.: song, letter, logo)
- a period . character
- the extension (e.g.: mp3, doc, gif)
The following tables identifies the common filename extensions that are used in
MS-DOS, in Windows, and on the internet.
Extension Association 7z 7z file format is a data compression and archive format. See: 7-Zip. ai Adobe Illustrator graphics file. See: Adobe Illustrator. asa Active Server file. See: Microsoft FrontPage. avi Audio Video Interleave file. bak Backup file. bat Batch file. bmp Windows bitmap graphics file. css Cascading Style Sheet file. Used to format webpages. csv Comma-Separated Values file. A generic way of storing a table of data, one record per line, each field value separated by a comma and enclosed in quotation marks (if needed). See: Microsoft Excel. db Database file. dll Dynamic Link Library. Provides functionality that Windows programs can call upon. Part of the Windows operating system and also included with some programs. doc
Tagged Image File Format is a file format used for storing images, including photographs and line art. tmp Typically used to indicate a temporary file. txt Text file. Open with Windows Notepad text editor. xls
Spreadsheet file format. See: Microsoft Excel. xml XML (Extensible Markup Language) fle format. See: XML. xsd XSD (XML Schema Definition) file format. See: XML. wav Waveform Audio file format. Used to store uncompressed audio. wma Windows Media Audio (WMA) is a digital audio file format. See: Windows Media Player. wmv Windows Media Video (WMV) is a compressed video file format. See: Windows Media Player. zip ZIP file format is a data compression and archive format. See: WinZip.
- Displays or modifies file extension associations.