How random are random numbers?

Real random numbers are hard for computers to generate. Even the most sophisticated algorithms for producing random numbers only work with the bits and bytes that they have available, and their values, although they may appear random, represent more of a pseudo-randomness that can be reproduced or predicted with more or less effort.

These pseudo-random numbers are not sufficient for a fair simulation of dice. That is why RPGDice.net uses the services of RANDOM.ORG.

RANDOM.ORG has made it its business to generate real random numbers, which are obtained by observing atmospheric noise.

More information can be found at https://www.random.org. If you want to support the work of RANDOM.ORG, please have a look at the corresponding answer in their faq.