File Extension .DB
The .db extension is an extension used by many database applications or to signify that the file is a database required by an application. Some of the more common applications to open and edit .db files include the Oracle database, Windows ThumbNail database, ArcView Object database, and Progress database.
 
However, it may also have been created by the Microsoft Works database application. These applications are quite different in many aspects and, as such, it is highly unlikely that you will be able to open the file unless you have the appropriate database application installed. If you are having problems opening a DB file simply click the green button below to completely repair file extension .DB associations in the Windows Registry - Then OPEN your File!