Since both the VSD and the VSSX formats originate from Microsoft Visio, it is likely you can perform VSD to VSSX using that program. There is no information known to us whenever some other program is able to create VSSX stencils out of VSD documents.
Convert Microsoft Visio diagram document to Microsoft Visio stencil file.
We have found 2 software records in our database eligible for .vsd to .vssx file format conversion.
Microsoft Windows software - convert vsd to vssx on Windows
A vector based diagramming software from Microsoft
Convert from vsd file format
|Yes, Microsoft Visio supports vsd file conversion as a source file type.||Yes||Yes||vsd editor||Yes||No||No||No|
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned vsd to vssx. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A converter for MS Visio stencils