jpg to sif conversion is possible, but since this is a bitmap to vector conversion, you will require vector graphics software that offers some kind of tracing function. With that you can turn simple pictures to vectors, thus it works best for various logos and geometric shapes and very poorly on photographs.
As for export to SIF format in particular, this can be a little tricky, but you can always try to export to SVG first and once you have the graphics in vector format, look for software that can save to SIF format.
Updated: September 11, 2023