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Random Number Generator

Generate random numbers in any range, with or without duplicates.

Calculators Reviews Free · no sign-up

Numbers drawn—
Pool size—
Sum—
Mean—

Where the randomness comes from

Numbers come from your browser's cryptographic random source, not a basic pseudo-random function, so results are not predictable from previous draws. Nothing you generate leaves your device.

Quick Tool Overview

The Random Number Generator produces one number or a whole set between any two values, with duplicates allowed or excluded. Numbers come from the browser's cryptographic random source rather than a simple pseudo-random function, so the distribution is sound and results are not predictable from previous draws.

What it does
Generates random numbers in a range, unique or repeating
You give it
A minimum, a maximum and how many you want
You get back
The numbers, sorted or in draw order, ready to copy
Best for
Raffles, giveaways, dice, sampling and test data
Calculators Free, unlimited use No sign-up Runs in your browser

About the Random Number Generator

Generate one number or a whole set between any two values. Duplicates can be allowed or excluded, which is the difference between rolling a die repeatedly and drawing numbers for a raffle where each can only come up once.

Numbers come from the browser's cryptographic random source rather than a simple pseudo-random function, so the distribution is sound and the results are not predictable from previous draws. Presets cover the common cases: dice of any size, coin flips, and lottery-style draws where you pick several unique numbers from a fixed pool. Results can be sorted or left in draw order, and copied as a list.

Key features of the Random Number Generator

Cryptographic randomness

Draws come from the browser's secure random source, so results are not predictable from earlier ones.

Unique or repeating draws

The difference between rolling a die repeatedly and a raffle where each number can only come up once.

Presets for common cases

Dice of any size, coin flips and lottery-style draws from a fixed pool.

Any range

Negative numbers and large ranges both work, not just 1 to 100.

Sorted or draw order

Keep the order they came out in for a fair draw, or sort them for a readable list.

How to use the Random Number Generator

  1. 1

    Set your range

    Enter the minimum and maximum. Both ends are included in the possible results.

  2. 2

    Choose how many

    Generate a single number or a set, and decide whether duplicates are allowed.

  3. 3

    Generate and copy

    Click generate for a new draw, then copy the results as a list.

Frequently asked questions

They come from the browser's cryptographic random source, which is designed to be unpredictable and is far stronger than a basic pseudo-random function. It is suitable for draws and picks, though not a substitute for a certified lottery system.

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