What happens if I request more unique numbers than the range allows?

The generator automatically caps the count to the range size. For example, requesting 10 unique numbers from 1–5 yields only 5.

Are the numbers truly random?

They use Math.random(), a pseudorandom source seeded by your browser — statistically uniform but not cryptographically secure.

Advanced Random Number Generator

Generate one or more random integers in any range. Optionally forbid duplicates. Free, instant, no signup.

Embed this tool on your site

<iframe src="https://abracalc.com/generator/advanced-random-number/embed.html" width="340" height="320" style="border:1px solid #e4e7ec;border-radius:12px" loading="lazy"></iframe>

How to use this tool

Set the minimum and maximum values for your range.
Choose how many numbers to generate.
Select whether duplicates are allowed.
Click Calculate to generate a fresh set. Click again to re-draw.

Generate one or more random integers across any range. Toggle duplicate prevention to draw unique numbers — perfect for lottery picks, sample selection, or random assignments.

Frequently asked questions

What happens if I request more unique numbers than the range allows?: The generator automatically caps the count to the range size. For example, requesting 10 unique numbers from 1–5 yields only 5.
Are the numbers truly random?: They use Math.random(), a pseudorandom source seeded by your browser — statistically uniform but not cryptographically secure.