The extension DAT is generally used for datafiles, ie data files. DAT files are nonspecific and can not be assigned to any data type. They can contain anything, graphics, audio, texts or simply data of the generating program.
Dat files are used and generated by quite a few programs and can normally only be used by these programs. You can use a text editor or rather a hex editor to easily view (look in) the file. However, these data views are usually useful only if there is a lot of prior knowledge on the part of the user.
Data files are for example used by Microsoft Visual Studio, Winamp, Windows and Firefox as well as many games.
Most often resolving problems with opening DAT files is very simple. Just install an appropriate program that supports such files. All of the listed programs support DAT files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of DAT files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate DAT files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Original program applications is not on the list, select "Browse" option in order to manually locate the directory where Original program has been installed.
Sometimes problems with opening DAT files may not lie with the application itself, but can arise due to other causes, such as: