Random Number Generator
Generate one or multiple random numbers within any range. Optionally ensure all results are unique, runs entirely in your browser, nothing is sent to a server.
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What is a Random Number Generator?
A random number generator picks numbers from a specified range using a pseudo-random algorithm. This tool lets you set a minimum and maximum value, choose how many numbers to generate, and optionally ensure each number appears only once. Everything runs in your browser, no data is sent to a server.
Common Use Cases
Picking a Winner
Assign each participant a number and generate one at random to fairly select a winner for a giveaway or raffle.
Games and Dice
Simulate any die roll, a standard d6 (1-6), a d20 for tabletop RPGs, or any custom range you need.
Random Sampling
Select a random subset of items from a numbered list without repetition using the "no duplicates" mode.
Decision Making
Can't decide? Assign each option a number and let the generator pick for you.
Frequently Asked Questions
Numbers are generated using JavaScript's Math.random(), which is a pseudo-random number generator (PRNG). It is unpredictable enough for everyday use, games, giveaways, sampling, but not suitable for cryptographic purposes.
When enabled, every number in the result set appears exactly once. For example, generating 5 unique numbers between 1 and 10 will never repeat a value. This uses a Fisher-Yates shuffle internally.
You can generate up to 100 numbers in a single click. If you need unique numbers, the range (To − From + 1) must be at least as large as the count.
Yes. You can set the "From" value to any negative integer, such as −100 to 100.
No. The entire tool runs in your browser. No input or output is transmitted or stored anywhere.