Random Number Generator — Free Online Tool

🎲 Random Number Generator

Whether you need a single random pick between two numbers, a batch of raffle winners, or a set of unique sample IDs for testing, this generator produces uniformly distributed random integers within any range you set. It runs entirely in your browser using the Web Crypto API where available, so numbers aren't predictable or sent anywhere.

You can generate as many numbers as you need in one go, and choose whether duplicate values are allowed — useful when picking multiple distinct winners from a list versus simply rolling dice-style values repeatedly.

How to use the Random Number Generator

Enter a minimum and maximum value for the range.
Enter how many random numbers you want generated.
Choose whether duplicate values should be allowed.
Click generate to get your list of random numbers, and copy them with one click.

How randomness is generated

The generator picks integers uniformly from the inclusive range [min, max] using the browser's cryptographically secure random number source when available, falling back to Math.random() otherwise. When duplicates are disallowed, it draws without replacement — meaning each generated number is unique until the available range is exhausted.

Frequently asked questions

Is this good enough for a raffle or giveaway draw?

Yes, for casual raffles, giveaways and classroom use this provides fair, unpredictable results. For regulated or high-stakes drawings you may want a certified random number service, but for everyday use the underlying randomness source is solid.

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

If duplicates are disallowed and you request more numbers than exist in the chosen range (for example, 20 unique numbers between 1 and 10), the generator will cap the output at the maximum possible unique values and let you know.

Can I generate negative numbers?

Yes — enter a negative minimum value (for example, −50 to 50) and the generator will include negative numbers in its range.