EMB files are often designed for screen viewing (zoomed in). A DST file made from an EMB might be too dense.
Most professional embroidery software will include this feature. Here is how to use it in common programs: emb to dst file converter
You now have a DST file ready for your commercial machine. EMB files are often designed for screen viewing (zoomed in)
You cannot simply change the file extension from .emb to .dst . Because EMB files contain proprietary edit data, you must "export" or "save as" using compatible software. emb to dst file converter