OneSafe program can exports its own OSBX format only to CSV. You can access this function via the File → Export menu. CSVs are text files, and as such can be further converted or re-saved to other formats, like PDF,DOC,XLS etc.
Convert OneSafe exported backup file to Comma Separated Value.
We have found one software suitable in our database for this conversion.
Multiplatform software - convert osbx to csv on any platform
Password manager for iPhone, iPad, Android, Windows Phone and Mac
Convert from osbx file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.