Random org integer generator

How it works

RANDOM.ORG collects atmospheric noise with radios and turns that noise into a stream of numbers. The integer form asks how many values you want, the inclusive lowest integer, and the inclusive highest. Each value is drawn from that stream independently, the way separate rolls of a die are separate. The public web form caps a single request at 10,000 integers, and each integer must lie between −1,000,000,000 and 1,000,000,000.

People type random org integer generator, integer random generator, and random integer generator when they mean this form, or a similar whole-number picker. The domain is random.org. A programming language’s rand or Math.random is usually a pseudo-random algorithm: fast, and repeatable if the seed is known. That is a different claim. The site’s public claim is true random from noise.

The service has been public since 1998. It is a tool, not a lottery commission. For a classroom draw or a raffle among people who can see the result page, the integer form is the ordinary path. For a contest that must leave an audit trail, the site also documents a drawing service with records. Match the tool to the stakes. Do not dress a casual click as a certified drawing.

Integer random generator versus a shuffle

An integer random generator that allows duplicates is the right object when you want dice-like draws: n numbers from a through b, repeats allowed. If you need each ticket once, that is the sequence generator: it shuffles a range and does not repeat, like names drawn from a hat and not put back. If you already have names, paste the names into the list randomizer. Do not encode people as numbers unless you must.

Integers: count, minimum, maximum; duplicates allowed. Sequence: every value in a range once, in random order. List: the actual items, shuffled. Dice and coins: familiar objects instead of a raw range.

Large jobs can take a moment. If you need more values than the public form allows in one submit, the site points to a file-generation path rather than asking you to click in a loop. Widgets and an API exist for software that should not scrape the HTML form. Scraping is how hosts get blocked.

When this generator is the wrong object

It is the wrong object for a cryptographic key. It is the wrong object if your range is mistyped: a draw from 1 through 31 when you meant 1 through 30 is a setup error, not a gift from the radio. It is the wrong object if the group cannot see the same result page and you later need to prove what was drawn. Publish the range, the count, and the output together.

If you can replay the integer from a seed in your pocket, you did not use RANDOM.ORG’s noise. You used a recipe. Atmospheric noise does not repair an unfair rule. Picking from 1 through 10 and then discarding 8, 9, and 10 until someone likes the result is not a fair 1-through-7 draw. Set the range you actually meant, submit once, and live with the number.