Random Number Generator

The Random Number Generator produces fair random numbers in any range, right in your browser.

Choose the range, how many you need, and whether repeats are allowed. Every result is genuinely random.

How to generate random numbers

1. Set the range. Enter a minimum and maximum value.
2. Choose how many. One number, or a set of up to 10,000.
3. Pick your options. Forbid repeats for a draw, and sort the output if you like.
4. Generate. Copy a single number or the whole list.

Why fairness matters

Ordinary random functions are predictable enough to be unfair for draws and sampling. This tool uses the browser's cryptographic generator instead, so no value is favoured.

Rejection sampling removes the subtle bias that plain modulo math introduces, giving every number in the range an exactly equal chance.

• Fair: cryptographic randomness with no modulo bias.
• Unique draws: pick numbers with no repeats.
• Private: everything runs on your device.
• Flexible: single value or a sorted set of thousands.

Related random tools

Random numbers are one of several ways to leave a choice to chance. For a quick yes/no or a dice roll, the Coin Flip & Dice Roller uses the same fair randomness.

When you are choosing between named options, the Random Decision Wheel spins to a winner. And to generate a secret rather than a number, the Strong Password Generator builds one from the very same crypto source.

Frequently Asked Questions

Is the randomness actually fair?

Yes. Numbers come from crypto.getRandomValues, the browser's cryptographically secure generator, and rejection sampling removes any bias, so every value in the range is equally likely.

Is anything sent to a server?

No. The numbers are generated in your browser, so nothing is uploaded or logged. It even works offline once the page has loaded.

Can I get numbers with no repeats?

Yes. Turn on the unique option to draw numbers without duplicates, which is perfect for raffles, lotteries, and random sampling.

How many numbers can I generate at once?

You can generate up to 10,000 numbers in one go. For unique draws, the count cannot exceed the size of the range you chose.

Can I sort the results?

Yes. Enable sorting to list the numbers in ascending order, which makes large sets and lottery-style draws easier to read.