Random Number Generator

Picking a random number sounds trivial until fairness matters: a raffle winner, a giveaway draw, a randomized order for presentations, a sample selection for testing. This generator uses the browser's cryptographically secure randomness — the same source used for encryption keys — rather than the predictable pseudo-random functions most quick tools rely on.

One technical detail done correctly that most generators get wrong: uniform distribution. The naive approach (random value modulo range size) subtly favors lower numbers whenever the range doesn't divide evenly into the generator's output space — a real bias, measurable in large draws. This tool uses rejection sampling, which eliminates modulo bias entirely, so every number in your range has exactly equal probability. For a fun tool, that's overkill; for a raffle with real stakes, it's the difference between fair and slightly rigged.

Set any minimum and maximum (negatives welcome), generate up to 1,000 numbers at once, and toggle "no repeats" for draw-style selections where each number can win only once — the tool checks that your range is large enough and tells you if it isn't. Copy the whole list with one click for spreadsheets and records.