Quote Originally Posted by zzyzxroad View Post
What I would also need is something to convert png or bmp to the SVG format in bulk.
Bulk conversion is impossible, but conversion one by one can be done, even if as Alain already told you the results are poor.
I started in this way and to have a decent result you have to start from rather large images, the bigger they are the better the conversion quality, although some tweaking should be done anyway.

For the conversion there are online sites or the Vector Magic program, but the best quality is obtained with Adobe Illustrator, which however is not easy to use.

The fact that you have to convert the icons one at a time will make you want to stop but what can console you is that the icons will appear small and many defects you will not notice them.