Random Number Generator

A random number generator produces one or more numbers drawn without any predictable pattern from a range you define. You set a minimum and a maximum, choose how many numbers you want, and the tool returns values spread across that interval. It is the digital equivalent of drawing numbered tokens from a bag, except the bag can hold billions of tokens and the draw is instant.

This generator runs entirely in your browser and prefers the Web Crypto API (crypto.getRandomValues) as its randomness source, falling back to the standard JavaScript generator only when Crypto is unavailable. That matters because the two sources are not interchangeable: cryptographic randomness is unpredictable enough for security-adjacent uses like picking tokens or shuffling, while ordinary pseudo-random output is fine for games and sampling but should never seed anything secret. Because the work happens locally, no request ever leaves your device and there is no rate limit to hit.

Beyond a single draw, the tool covers the cases people actually reach for: integers or decimals with a chosen number of places, unique-only batches where no value repeats (useful for lotteries, raffles, and random sampling without replacement), and bulk generation of up to ten thousand numbers at once with running totals and an average. Everything is copyable as a newline-separated list so it drops straight into a spreadsheet, a script, or a test fixture.

Randomness comes from the browser's cryptographic generator rather than from Math.random, which matters when the result decides something. Math.random is fast, seeded from an unspecified source, and explicitly not suitable for anything where predictability is a problem. The range is mapped without modulo bias, the subtle flaw where naively taking a remainder makes the lower values in a range slightly likelier than the rest.