Generate a random number

Draw bounded random integers or decimals with browser cryptographic randomness.

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ToolRandom Number Generator
Input
Output
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Preview

How it works

Integer mode uses rejection sampling from a 32-bit random word to avoid modulo bias, while decimal mode divides a random word by 2³² to select values in the interval. Count repeats sampling independently.

  • The initial range is 1–100 with one draw.
  • The source is not seeded for reproducibility.

Worked example

Roll 5 Dice
Generate 5 random integers between 1 and 6
Input
											Min: 1
Max: 6
Count: 5
Integers: true
Output
												5, 3, 1, 1, 2

When to use this

Raffles draw tickets, test harnesses sample bounds, and games choose random integer or decimal inputs.

Edge cases

  • Integer bounds use ceil and floor, so a range with no integer is rejected.
  • Out-of-range words are discarded rather than introducing modulo bias.
  • A seed cannot reproduce browser crypto results.

References