Random org number

How it works

RANDOM.ORG is a true-random service. Radios pick up atmospheric noise; that noise is processed into a stream of numbers. The integer form asks how many values you want, the inclusive minimum, and the inclusive maximum. The public form caps a request at 10,000 integers, each between −1,000,000,000 and 1,000,000,000. Each integer is drawn independently, like separate dice rolls, so duplicates can appear. If you need each value once, that is a different tool: the sequence generator, which shuffles a range without repeating, like tickets drawn from a hat.

People search random org number, random number generator.org, and random number generator org for the same site. The domain is random.org. A random org number generator is that integer form, or one of the sibling forms (sequences, decimal fractions, lists, dice, clocks, dates). They all sit on the same noise stream. A programming language’s rand or Math.random is usually a pseudo-random algorithm: fast, repeatable if you know the seed, and not the same thing.

The site has been public since 1998. It is a tool, not a lottery regulator. For a classroom draw or a raffle among friends, the integer or list form is the usual path. For a contest that must be audited, the site also offers a documented drawing service with records. Use the level of tool that matches the stakes.

Which form to pick

Integers: you want n numbers from a to b, and repeats are allowed. Sequences: you want every number in a range exactly once, in random order. List randomizer: you paste names or items and get them shuffled. Dice and coins: you want the familiar objects, not a raw range. Gaussian: you want a normal distribution, not a flat one. Strings and passwords: you want characters, not quantities. Clock times and calendar dates: you want a random time of day or a random date in a span you set.

The integer form is the random org number most people mean. Set the count, set the bounds, submit, wait. Large jobs can take a moment. If you need more than the form allows, the site points to a file-generation service rather than asking you to click 10,000 at a time in a loop.

Independent integers: repeats possible; good for dice-like draws. Sequence: no repeats; good for raffle tickets and shuffling a roster. List: paste the actual names; do not encode people as numbers unless you must.

Quota: the site meters heavy automated use; a browser form for a handful of numbers is the ordinary case. A shuffle you can replay from a seed is a list with a recipe. A Random.org number does not come with that recipe.

What this tool is not

It is not your language’s standard library. Python, JavaScript, and the rest can produce numbers that look random and still be predictable if the generator and seed are known. That is fine for a shuffled playlist. It is a poor fit when someone will argue about who was picked. Atmospheric noise does not make a result “fair” if your range is wrong. If you meant 1 through 30 and you typed 1 through 31, the extra value is a setup error, not a gift from the radio.

It is not a guarantee that a human will accept the result. Publish the range, the count, and the timestamped output if the group needs to see the same page. Do not screenshot a local app and call it RANDOM.ORG. The URL and the result belong together.

Widgets and an API exist for sites that need numbers without a person clicking the form. Those are still the same generator. They are not a second kind of randomness. If you are writing software, use the current API rather than scraping the integer page. Scraping is how hosts get banned.