Yes. It works fine. The trouble is with instant calculators is that the seed is reset each time you use it within the website. We could use the system clock, but this would hardly be random.

If you use the graph or table option; but give a range for the random seed, i.e. "0.1:0.5", then underlying numeric code is only loaded once by the website and will be seeded by the first number in the range, i.e. 0.1. Just don't pay too much attention to the x-axis on the graph!