Math
Random Number Generator
Generate random numbers in a range.
Numbers generated
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Min / Max
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Sum
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Results
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FAQ
- Why use crypto.getRandomValues instead of Math.random?
- crypto.getRandomValues uses the operating system's cryptographically secure pseudo-random number generator (CSPRNG), which provides far better statistical unpredictability than Math.random. This matters for any use case where guessability is a concern, such as tokens, game seeds, or sampling.
- What happens when "no duplicates" is checked but count exceeds the range?
- If the number of unique integers available in [min, max] is smaller than the requested count, the generator will produce as many unique values as possible (the full range) and then stop — it will not loop infinitely.
- Is my data sent anywhere?
- No. All generation happens entirely in your browser using the built-in Web Crypto API. Nothing is uploaded or logged.