Random Number Generator
Generate random numbers for games, raffles, passwords, and more. Choose from standard RNG, dice roller, coin flip, or lottery mode.
Quick Presets:
What is a Random Number Generator?
A Random Number Generator (RNG) produces numbers that lack any pattern or predictability. Our tool uses the browser's built-in pseudo-random algorithm to deliver fast, high-quality random numbers suitable for games, raffles, classroom activities, data sampling, and everyday decision-making.
Uses for Random Numbers
Random numbers are used in board games and tabletop RPGs (dice rolling), giveaway/raffle drawings, statistical sampling, A/B testing, generating test data, picking lottery numbers, and making fair group assignments.
True Random vs. Pseudo-Random
True random numbers are derived from physical phenomena like atmospheric noise or radioactive decay. Pseudo-random numbers are generated by deterministic algorithms that produce sequences indistinguishable from randomness for practical purposes.
For everyday needs — games, raffles, classroom picks — pseudo-random generators like this one are perfectly suitable. Only cryptographic applications (encryption keys, secure tokens) require true or cryptographically-secure RNG.
RNG in Gaming
Video games and tabletop games rely heavily on RNG for loot drops, critical hits, enemy behavior, map generation, and card shuffling. The dice roller mode on this page simulates standard gaming dice (D4 through D100) commonly used in Dungeons & Dragons, Pathfinder, and other tabletop RPGs.