Both .shv and .vip3 files can be found as embroidery designs for Husqvarna Viking stitching and sewings machines. As such, it should not be hard to convert them between each other with a software provided by Husqvarna. Some viable choices are listed below.
Convert Husqvarna Viking Designer 1 sewing machine embroidery design to Husqvarna Viking Stitch file format.
We found one software available in the database for this conversion.
Microsoft Windows software - convert shv to vip3 on Windows
An embroidery design software
Convert from shv 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.