Random Number Generators (RNGs) in online casino games ensure fair play by generating unpredictable outcomes. These algorithms produce random sequences, determining results like slot spins, card draws, or dice rolls. RNGs are tested and certified by independent agencies to maintain fairness and prevent manipulation. In online casinos, true randomness comes from pseudo-random number generators, using complex mathematical formulas and seed values. Reliable RNGs are critical for trust and transparency in online gambling platforms.