Without Microsoft Visio, it seems there are no options for vsd to vdx conversion, ie to convert Visio diagram to XML version. You have to use the original program as the file formats are mostly proprietary and not support in 3rd party apps.
Convert Microsoft Visio diagram document to Microsoft Visio drawing XML file.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert vsd to vdx 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 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.