Random number generator — secure and unbiased
Generate a set of numbers for a game, practice exercise or informal selection. Choose a range, a count and whether whole-number results may repeat.
Runs in your browser — your input is not uploaded to ToolsNow.
How to use
- Set the range and count. For ten simulated die rolls, enter minimum 1, maximum 6 and count 10, with Whole numbers only on and No repeats off.
- Choose the options. Request up to 1,000 values. For whole numbers, both range endpoints are included when they are integers.
- Copy the set you want to keep. Changing a setting generates a new set. Generate again also replaces the result with a fresh set.
Questions
Why can I not request ten unique integers from 1 to 5?
There are only five available integers. Reduce the count, widen the range or turn off No repeats. Repeated values are normal when repeats are allowed.
Can decimal results look identical with No repeats on?
Yes. Uniqueness is checked before decimals are rounded to six places for display. Different generated values can therefore appear as the same decimal. Use whole numbers when you need visibly distinct entries.
Can I use the result as proof of a fair prize draw?
The numbers come from the browser’s crypto.getRandomValues source, but this page does not provide a saved draw record or an independent audit. A copied list alone does not establish how a prize draw was conducted.
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