Created primarily by Wilcom software, EMB is an object-based "source" file.

A DST file has a very specific internal structure: it consists of a followed by a body that contains the actual DST commands, such as control codes, TRIM commands, and sequin commands. Significantly, DST files do not contain color information . When a DST file is loaded, the embroidery machine automatically assigns colors, often in the order they appear in the design.

Professional software offers the most control over stitch quality during conversion. Naan Designs DST vs PES vs EMB | Embroidery File Formats Explained