Random Number Generator

PickerSpin's random number generator picks one or more whole numbers from any range you set, from 1 to 10 up to a billion, using the browser's Web Crypto API so every number in the range has the same chance.

Pick a number from 1 to 10, 1 to 100, or anything else

Tap one of the common ranges above the form and you get a number straight away. For anything else, type the lowest and highest numbers you want. Both ends are included, so 1 to 10 can give you 1 and can give you 10. Negative numbers work, and the range can run up to a billion.

Several numbers at once, with or without repeats

Set "How many" and the generator draws them together. With No repeats on, which it is by default, no number appears twice, the way numbered balls come out of a drum. Turn it off when repeats are allowed, for example when you are simulating dice rolls. Sort the results if you want them in order, which helps when you are checking raffle tickets against a list.

How the numbers are drawn

Every number comes from crypto.getRandomValues(), the random generator built into your browser for security work. Turning its output into a number in your range has one well-known trap: taking the remainder after dividing makes low numbers come up slightly more often. This page throws away the few values that would cause that and draws again, so every number in the range has exactly the same chance. The randomness page runs a live test you can check for yourself.

When to use the number wheel instead

This page is for getting numbers fast. If you want a room to watch the draw, at a raffle or in a classroom, spin the random number wheel, which shows the same kind of draw on a wheel. There are ready-made wheels for 1 to 10 and 1 to 100, and for a board game, the dice roller.