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List & number tools

List & number tools randomizers

Shufflers, pickers, weights, raffles, brackets.

Twenty-three general-purpose tools — shufflers, single and multiple pickers, weighted draws, raffles, brackets, samplers. This is the category to reach for when your problem is not domain-specific: you have a list, and you need one item, several items, an order, or a split.

List & number tools

Pick the operation, not the theme

Most confusion here comes from reaching for the wrong operation rather than the wrong tool. Drawing one item, drawing several distinct items, ordering the whole list, and assigning one list onto another are four different jobs, and repeating the first does not produce the second: picking three times can return the same name three times, because each draw starts fresh.

If duplicates would be a bug, you want a tool that draws without replacement — the multiple-winners draw, or a shuffle you take the first n from. If duplicates are merely a coincidence, repeated single picks are fine.

Weighting and fairness

A weighted draw is not an unfair draw; it is a draw where you have stated the odds deliberately instead of inheriting them. Raffles with multiple tickets per person are the everyday example, and doing it by pasting a name repeatedly works but hides the odds from everyone looking at the list.

Every unweighted tool here is uniform in the strict sense: picks use the browser's cryptographic random source with rejection sampling, so the modulo bias that skews naive implementations toward the start of a list is not present.

Reproducibility

Several tools accept a seed. With one set, the same list and the same seed always produce the same result, which turns a draw into something you can demonstrate afterwards — publish the seed and the list beforehand, and anyone can verify you did not re-roll. Tools without a seed field draw fresh every time and cannot be replayed; for a contested draw, that distinction matters more than the animation does.

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