Hi Richard, glad to meet you!
I’m working for a CAD vendor with a STL repair option (won’t do any advertising here). A major part of my job in the past year was ensuring that
1. STL files load properly into our product,
2. our product repairs them to watertightness/closed topology etc,
3. we don’t break them on export.
Opening one file after another in Meshlab & Co for inspection was very annoying (I’ve got a test set of thousands of STLs here – text/binary, with/without color, and so on). I wrote my STL Viewer at home to speed up the process – go through the files like a photo gallery, dozens per minute.
Some friends and colleagues liked it a lot, so I decided to make a website instead of sending it via E-Mail. Now that I have a website, I can just as well share it with the world.
I see that unknown links are often problematic so you can look for feedback from other users:
My program in specific is often detected as a false positive. That’s because today’s anti virus software uses heuristics: Viruses are very small, and so is my program (portable version < 70 KB), so it could be a virus. Viruses need no other components installed, and neither does my program, so it could be a virus. And so on. I’ve fixed the problems with AVG and G-Data (see here) and I’m awaiting answer from Avast, so warnings from one of these suites can be safely dismissed.