MapTool has a HLC importer per se. Basically, you put the directory containing your HLC portfolios into your Resource Library, then when you select the portfolio, each character inside the portfolio is importable as a token.
The main issue being that MapTool isn't just for Pathfinder, it can be used to play any game (including backgammon or poker), so settings things up for a Pathfinder-specific game environment involves a little work.
Check out the website at
www.rptools.net, and
join the Discord server if you want real-time interaction with other users and the MapTool developers. (We have an extremely helpful community!)
<standard_disclaimer>
I'm one of the MapTool devs, so not only do I think MapTool is the best of all the VTTs currently available, but I'm a little bit biased.
</standard_disclaimer>