Calculators & Utilities

Random Number Generator

Generate unbiased random integers in an inclusive range with optional uniqueness.

Free to use No account needed Quick result

Tool workspace

Private by design

Your result

Your result will appear here…

About the Random Number Generator

Random Number Generator uses rejection sampling over cryptographic random 32-bit values to avoid modulo bias. Both endpoints are included, and unique mode checks that the requested count fits the range.

How to use the Random Number Generator

  1. Set integer minimum and maximum.
  2. Choose quantity and uniqueness.
  3. Generate and copy the one-per-line results.

Practical tips

  • Unique mode becomes slower when requesting nearly every value from a very large range.
  • Random numbers do not automatically make a fair experiment if the sampling method is biased elsewhere.
Helpful answers

Random Number Generator FAQs