Online casinos use random number generators (RNGs) to ensure that the outcomes of their games are fair and unbiased. These RNGs generate random sequences of numbers that determine the outcome of each game. Online casinos are also subject to regular audits and testing by third-party companies to ensure that their games are fair and their payouts are accurate. Additionally, many online casinos have customer support teams available 24/7 to help players with any questions or concerns they may have.