How random number generation works
This generator uses the browser's pseudo-random number generator to produce values in the range you choose, then rounds or shuffles depending on the mode.
True random vs pseudo-random
True randomness comes from physical processes. Browser random numbers are pseudo-random, which is fast and suitable for games, classroom activities, draws, and everyday selection tasks.
Uses of random number generators
Random generators are useful for selecting winners, making teams, drawing lottery-style sets, choosing study questions, generating sample data, and adding fairness to simple decisions.