Spinoo, the random wheel

Enter your names and spin the wheel: the draw is fair and verifiable. Free, no sign-up, nothing is sent to a server.

How does Spinoo work?

Add your entries in the “Entries” panel, one per line, then click “Update the wheel”. You can also import a CSV file or a Google Sheets spreadsheet.
Give someone better odds by writing name:3: they will be three times more likely to be picked.
Elimination mode: remove each winner to draw a running order or find a final winner.
Up to 3 wheels: for example one for names, one for tasks and one for prizes.
In class or in a meeting: go full screen, add a countdown or hide the names while the wheel spins.

Is the draw really random?

Yes. Every draw uses the browser's cryptographic random generator. The winner is computed before the animation from a random seed and the list, and the “fairness certificate” lets anyone redo the calculation to check that the result was not chosen.

Is my data sent anywhere?

No. The list, the history and the centre image stay in your browser. The share link contains the list itself: only the people you send it to can see it.

How to use it

Enter participants, one per line, or import a CSV file or a Google Sheets sheet, then update the wheel.
Add weights if needed: Leah:3 gives Leah three times the chance of someone with no weight.
Spin with one click (or the keyboard). The winner is shown and the history keeps every draw.
Choose the mode: single draw, or elimination to remove each winner and get a full order.
Customise: colours, centre image, full screen, countdown before the draw, names hidden while spinning.
Share the wheel by link: the list is contained in the link, nothing is stored on a server.

Ideas

In class: pick a student at random without anyone feeling targeted, draw the order of presentations (elimination mode), form pairs.
In meetings: choose who runs the next retrospective or takes the notes.
Games and parties: a names wheel, a challenges wheel and a prizes wheel, up to three wheels side by side.
Giveaways and raffles: the fairness certificate proves the draw was not rigged.
Everyday decisions: tonight's restaurant or film.

How is the draw made verifiable?

Before the animation, Spinoo draws a random seed with the browser's cryptographic generator and derives the winner from the list and weights. The animation only shows a result already fixed: the wheel's speed has no influence. The certificate shows the seed, the list and the result; anyone can redo the calculation and get the same winner. That is the difference from a wheel that stops “wherever the animation lands”.

Practical questions

How many participants? Several hundred are possible, but beyond about fifty the names get hard to read on the wheel: the winner is still shown in large print.
The same name twice? That is the same as a weight of 2. Prefer the clearer name:2 notation.
Are my lists kept? Yes, in the device's browser, with the history. Nothing is sent.

Guide written and checked by Erwan Hautot · updated 29 October 2026.