Coin, wheel or teams: three ways to hand a decision to chance

Letting chance decide works best when the method fits the question. Two options want a coin. A list of chores wants a wheel that does not hand the same job out twice. A room of people wants splitting into groups where two particular people are not together. Omikuji Tools has a page for each, and all three run in your browser without an account.

Coin Toss: two options, and an honest random source

Tap the screen or press Space and the coin lands. You can flip up to 10 coins at once, rename the sides (Pizza / Sushi works as well as Heads / Tails), and the last 20 results stay in a history that survives a reload. The randomness comes from crypto.getRandomValues rather than Math.random().

Then there is a section called Rig the Odds: a slider that sets the chance of heads anywhere from 1% to 99%. The page suggests setting heads to 1% for the thing you do not want to do, and promising yourself you will do it if it lands anyway. One thing to know before you use it on friends: the share link carries the coin count, labels and the weight, so a rigged coin shared by URL arrives rigged.

Roulette & Duty Maker: a wheel with two modes

Type items one by one, or paste a list with one item per line. Adding , 3 after an item gives it a weight from 1 to 10, and the wheel gives that item a proportionally larger slice.

Pick one is the ordinary wheel. Assign in order is the one I find more useful. Each item that comes up drops off the wheel, so the next spin only chooses among what is left, until everything has been assigned once. You can attach duty labels — Monday, Tuesday, and so on — and each result gets the next label in spin order, which turns five spins into a week's rota. A progress bar shows how many are done and how many remain. The finished wheel can be saved as an image or shared as a link.

Team & Seat Maker: splitting people, with rules

Paste names one per line, optionally followed by gender (M/F) or a skill level (1–5), and choose either a number of teams or a team size. With Random balance you get a plain shuffle. With Balance attributes, or once you add pairs to Keep these pairs apart, it tries up to 2,000 shuffles and keeps the arrangement that best evens out the attributes and keeps those pairs separated. You can also define your own attributes, either as categories or as 1–5 star levels balanced by team totals.

Seating mode lays people out on a rows × columns grid with the front marked. There, the rule is "don't seat adjacent", meaning directly in front, behind, or beside — diagonal seats do not count. Either result can be adjusted by dragging, saved as an image, or shared by URL.

👉 Coin Toss · Roulette & Duty Maker · Team & Seat Maker — free, no sign-up, runs in your browser.

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