Available in pre-release 3.7
Usage: SumatraPDF bake [options] input.pdf [output.pdf]
PDF format has annotations and widgets (used in forms) as special kinds of objects.
bake is an advanced tool that converts annotations and widgets into regular PDF objects. It bakes PDF form and annotations into static content.

All options #

Usage: SumatraPDF bake [options] input.pdf [output.pdf]
  -A      keep annotations
  -F      keep forms
  -O -    comma separated list of output options