SubToSup

SubToSup is a software application with a pretty self-explanatory name - it allows you to convert subtitles from the SUB format to the SUP file type, based on the IDX file. It can be easily figured out, even by inexperienced users.

This is a portable product, so installing SubToSup is not necessary. It means that you can store the app on an external storage device (like a USB flash drive), save it to any computer and directly run its executable file.

What's more important is that the Windows Registry does not receive new updates, and no leftover files can be found on the hard drive after program deletion. Also, you can have SubToSup with you whenever you're on the move.

The tool is wrapped in a small interface with an uncomplicated window. SubToSup comes with limited features; all you have to do is load an IDX file by using the file browser ("drag and drop" is not supported), in order to initialize the conversion procedure.

Unfortunately, you cannot establish the output directory or filename. SubToSup automatically converts files to the same location as the original items. It supports two languages for the GUI - English and German.

The small tool needs a low amount of CPU and system memory to work properly, so it doesn't put a strain on your computer's resources. It is very responsive to commands and includes a Readme file. No error dialogs have been displayed in our tests and SubToSup did not hang or crash. Thanks to its intuitive layout and overall simplicity, first-time users should have no problems in discovering how to work with SubToSup. Unfortunately, it has not been updated for a long time.