I've found inkscape works well enough.
You might see after converting some of the more complex curves are made up of individual line segments (corded)...
I usually have to go back and tweak those, not sure if that's on the inkscape side, coming from the PDF or what.
(Guess I haven't gotten annoyed enough with it to bother yet.)
What that can do is the laser will slow down in curves and you might get bad cuts. (just a heads up.)