Visio formats are rarely supported in 3rd party programs, so your best and perhaps only reliable option for conversion (or transformation) of Visio .vsx files (stencils) to .vsd files (diagrams) is to use the original programs. If you do not have access to MS Visio, it will be very hard, if not impossible, to perform this vsx to vsd conversion.
Convert Microsoft Visio stencil XML file to Microsoft Visio diagram document.
We found one software available in the database for this conversion.
Microsoft Windows software - convert vsx to vsd on Windows
A vector based diagramming software from Microsoft
Convert from vsx file format
|Yes, Microsoft Visio supports vsd file conversion as a target file type.||Yes||Yes||vsd editor||Yes||No||No||No|
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.