Online slot machines are indeed random, as they employ a Random Number Generator (RNG) to produce outcomes that are entirely unpredictable. The RNG is designed so that each spin is independent of the previous one, meaning that past results have no influence on future outcomes. This system guarantees that there is no discernible pattern to the results, making it impossible to predict or manipulate the outcomes to improve winning chances. The randomness provided by the RNG maintains fair play, as no external factors can affect the results. Thus, online slots uphold their integrity and provide an unbiased gaming setting for all players.