Convert
Pick the conversion you need.
Every page runs the same converter; the difference is the notes, which spell out what the target format can store. Drop a file on any of them, or use the general converter.
What a conversion can and cannot change
Every stitch format stores the same thing at heart: a list of needle positions in 0.1 mm steps with commands between them for colour changes, jumps and trims. Converting keeps every position; what differs is the metadata each container can hold. DST and EXP have no colours, only stops. PES stores colours as an index into Brother's 64-entry palette and JEF into Janome's 79-entry chart, so a thread becomes the nearest entry on the way in. VP3 carries thread names; XXX carries RGB. DST records cannot move more than 12.1 mm, so longer stitches are written as two.
A conversion does not resize, re-digitise or improve a badly digitised file, and it does not turn a flat design into an appliqué. For that, build the design in the studio, or extract a cut file from an existing appliqué design with the cut-file tool. For every other embroidery-file job (pre-flight checks, resizing with density correction, lettering) our sister site Stitch Toolbox has the tools.
Looking for EMB, ART, CSD or VP4? Those are object formats that only Wilcom, Bernina, Compucon or Husqvarna software can open. Export a stitch format (PES, DST, VP3) from that software, then convert here.