I've used this for a while - it used to be free, I think it was hosted by some university. I would upload logos and stuff on there and then download the svg and scale them to my likings. It does work very very well.
Edit: it used to run only on a cluster of servers, the client-side program is new I think.
Edit: it used to run only on a cluster of servers, the client-side program is new I think.