RebrickNet is an abandoned project that supports only 300 parts. I recommend Brickognize [1], which recognizes all 85k Lego parts, minifigures, and sets.
That's a weirdly minimalistic site. I mean it's nice that the front page is exactly what you want to see but I wish the About page would show some more information about the what the site can do, some examples, technology bits etc.
Disclosure: I'm the creator.
[1] https://brickognize.com/