File Extensions
Every File Extension in the World -- almost!
This is a resource for looking up file extension names or suffixes. By browsing alphabetically, you will be able to find the format you are looking for and learn what program it is associated with. In general, if you have the program that uses that file extension, that program can be used to open or otherwise use the file.
You will also find a handy link on each file extension page that will allow you to ask IT Knowledge Exchange members for more information about the file you are looking up.
Many people have contributed to this ever-growing list and we thank them! If you know of a file extension that should be added to this list, please e-mail us and we'll add it.
Top 20 File Extensions
- .MTS (AVCHD video clip format)
- .M4A (Unprotected AAC audio file)
- .EPS (Encapsulated Postscript Vector graphics (Adobe Illustrator))
- .INDD (Adobe InDesign document)
- .STP (STP stands for STandard for the Exchange of Product. )
- .PSD (Adobe Photoshop default)
- .XML (eXtensible markup language)
- .SWF (Object (ShockWave Flash))
- .MSI (Installer package (Microsoft Windows))
- .MSI (Installer package (Microsoft Windows))
- .JPEG (JPEG compressed bitmap)
- .TIFF (Tag image bitmap file (TIFF))
- .MHT (MHTML document (Microsoft))
- .CDR (Corel Draw Vector drawing file)
- .RTF (Rich Text Format document)
- .MPP (Project file (Microsoft Project))
- .WEBARCHIVE (Safari Web archive file)
- .EML (Microsoft Outlook Express mail message (MIME RFC 822))
- .STP (Standardized graphic exchange file format)
- .TS (HDTV sample file (Transport Stream MPEG-2 video stream))