Generate Random Numbers in Any Range

How Random Number Generation Works

This generator uses Math.random(), a pseudorandom number generator (PRNG) built into every browser. For everyday uses — games, drawings, decisions, homework — this is perfectly random. For cryptography or security applications, use crypto.getRandomValues() instead. The "no duplicates" option uses a Fisher-Yates shuffle algorithm to ensure every number in the range appears at most once.

Common Uses for Random Numbers

Lottery/raffle drawings: Generate unique numbers in your range. Random selection: Pick a random student, team, or item. Games: Dice rolls, card draws, random encounters. Statistics: Random sampling from a population. Decision-making: When you genuinely cannot decide, let randomness choose. Pro tip: if you are disappointed by the random result, that tells you what you actually wanted.