Just for general info; Roll20 does allow import from a pdf, but only a single page at a time, which I believe it gets converted to a jpg. The Pathfinder sheet has a built-in HeroLab import feature and the forthcoming(still in beta) Pathfinder Companion script (API scripts are a Pro perk) will allow plain text parsing from SRD/PRD/ and PCGen(if exported as a plain text standard stat block). What system/sheet are you wanting to import?