MathsLive

Random Number Generator

Set the min, max and how many numbers you need.

Short answer

Numbers are generated using your browser's cryptographically-strong random source where available, otherwise Math.random(). Each change of any input regenerates the list.

Range

Minimum

Maximum

How many numbers?

Unique numbers only

Fill in the fields above to see your result instantly.

How it works

We use crypto.getRandomValues() when your browser supports it (most modern browsers), otherwise fall back to Math.random(). Each integer is uniformly distributed across your chosen range.

Worked example

Min 1, Max 6, Count 1, Unique off → simulates a single dice roll. Min 1, Max 49, Count 6, Unique on → a Lottery line.

Who should use this

•Picking a winner from a list
•Choosing test data
•Random sampling for surveys

Common mistakes

×Confusing 'unique' with 'sorted' — uniqueness doesn't change order
×Setting count higher than the range allows when unique is on

Frequently asked questions

Are the numbers truly random?▾

Browser crypto-random is suitable for most uses. For cryptographic security, use server-side hardware-backed randomness.

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