Calculators · Free
Random Number Generator
Generate random whole numbers in any range, one or thousands at once, with or without repeats — unbiased and drawn from your browser's secure random source.
About this tool
Set a minimum and a maximum, choose how many numbers you want, and press Generate. Tick "No repeats" to draw each number at most once — handy for raffles, picking winners, shuffling a list of entries or choosing sample rows — or leave it off for independent draws such as dice rolls.
The numbers come from the Web Crypto API (crypto.getRandomValues), the same source browsers use for encryption keys, not from a predictable pseudo-random formula. Each value in the range is exactly equally likely: the generator discards the few raw values that would otherwise make some numbers slightly more common (the modulo bias that simple random generators have).
Up to 10,000 numbers can be drawn at once; everything happens in your browser.
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