Random Number Generator
Generate cryptographically strong random numbers in any range, with optional uniqueness.
Knowledge Base & Educational Companion: Randomness Done Right
Random numbers drive raffles, sampling, games and simulations. The quality of the underlying generator determines whether results are truly unpredictable or subtly biased.
1. Cryptographic vs Pseudo
Basic Math.random() is fast but predictable. This tool draws from the browser's crypto.getRandomValues, giving uniform, unbiased values suitable even for security-sensitive draws.
2. Inclusive Ranges
Both the minimum and maximum you enter are included as possible outcomes. The generator maps raw random bytes into the range without modulo bias.
3. Unique Draws
Enabling uniqueness produces a set with no repeats — ideal for lottery numbers or assigning slots — provided the range is large enough to hold the requested count.
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