Are these numbers truly random?

They use the browser's Web Crypto API (crypto.getRandomValues), which is a cryptographically strong random source. The tool also removes modulo bias so every value in your range is equally likely.

Can I get numbers with no duplicates?

Yes. Enable "No repeats" and the generator draws unique values using an unbiased shuffle, as long as your range is large enough to fit the count you asked for.

Are the minimum and maximum included?

Yes. The range is inclusive of both endpoints, so a range of 1 to 6 can return any value from 1 through 6, like a die.

What is modulo bias and why does it matter?

Naively taking a random integer mod N makes some values slightly more likely than others when the random range is not a clean multiple of N. This tool rejects the unevenly-distributed top slice of values and re-draws, so every number in your range is exactly equally likely.

How many unique numbers can I draw with no repeats?

At most the size of your range. If you ask for more unique numbers than the range contains (for example 10 unique numbers from 1 to 5), the request cannot be satisfied — widen the range or lower the count.

Is this good enough for raffles and giveaways?

Yes. Because it uses a cryptographically strong source with bias removed, it is well suited to fair raffles, prize draws, sampling, and any case where unpredictability matters.

Is anything sent to a server?

No — every number is generated locally in your browser using the Web Crypto API. Nothing is uploaded.

Random Number Generator

Generate one or many random numbers in any range you choose — for raffles, prize draws, lottery picks, sampling, dice and decisions. Numbers come from the browser’s Web Crypto API, a cryptographically strong source, with modulo bias removed so every value is equally likely.

How it works

You set a minimum, a maximum, and how many numbers you want. For each value the tool requests random bytes from crypto.getRandomValues and maps them into your range using rejection sampling: it discards any raw value that falls in the uneven top portion of the byte range and re-draws, which eliminates modulo bias and keeps every integer from min to max (inclusive) exactly equally likely.

With No repeats enabled, the tool draws unique values — effectively shuffling the range with an unbiased Fisher–Yates shuffle and taking the first N — so no number appears twice, provided the range is large enough to supply the count you asked for.

Example

Range 1 to 50, count 6, No repeats on. A draw might be:

7 · 19 · 23 · 31 · 42 · 49

All six are distinct, suitable for a lottery-style pick. Turn No repeats off and the same number could appear more than once, like rolling the same value twice.

Setting	Meaning
Min / Max	Inclusive bounds of the range
Count	How many numbers to draw
No repeats	Forces all results to be unique

Everything runs entirely in your browser — nothing is uploaded.