You're here because you have a file that has a file extension ending in .sttpl. Files with the file extension .sttpl can only be launched by certain applications. It's possible that .sttpl files are data files rather than documents or media, which means they're not meant to be viewed at all.

A Samsung theme showcase file can be opened and viewed using the Samsung Theme Designer software, but these Samsung theme showcase files cannot be created using this application. The Samsung Theme Designer application is a program from Samsung that is integrated with a set of functionalities used for developing custom themes that can be implemented into compatible mobile phones and devices manufactured by Samsung. These Samsung theme showcase files are distributed as sample themes and bundled with supported Samsung mobile devices and phones. The content of these Samsung theme showcase files may include the visual layout attributes, digital image elements and other details associated to the sample Samsung theme. The operating system of these supported Samsung mobile phones and devices can also be used to view these Samsung theme showcase files. This is done by activating these sample themes within the Samsung mobile phone or device. Samsung mobile phone and device themes that can be created, customized and edited or modified using the Samsung Theme Designer software are files in the STPROJ format. These Samsung theme showcase files, on the other hand, cannot be edited or modified as custom themes, and these Samsung theme showcase files are implemented with encoding specifications proprietary to Samsung and used for the STTPL file format and the .sttpl extension.

Launch a .sttpl file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .sttpl file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .sttpl files aren't yet associated with it. In this case, when you try to open a .sttpl file, you can tell Windows which application is the correct one for that file. From then on, opening a  .sttpl file will open the correct application. Click here to fix .sttpl file association errors

Be careful not to rename the extension on .sttpl files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

A file extension is the set of three or four characters at the end of a filename; in this case, .sttpl. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.