Embird is a widely used management software that can read EMB files (with the proper plugin installed).
Wilcom is the creator of the EMB format. Their free viewer, TrueSizer, is the gold standard for conversion. emb to dst file converter
If you own digitizing software (Wilcom, Hatch, Pulse, Bernina ArtLink), this is the gold standard. Embird is a widely used management software that
Programs like Hatch (by Wilcom), Embrilliance, or SewArt can open EMB files and export DST. emb to dst file converter
If you are a commercial embroiderer, simply converting EMB to DST is not enough. You must "optimize" the DST.