gizmobench

Yes or No

Type a question, or don't, and press Ask: one answer is drawn from the browser's cryptographic random generator, with yes and no exactly as likely as each other. The tally stays on screen for the whole session and calls out a run, so four yeses in a row are visible as the ordinary clumping of fair coin flips rather than a sign. Add Maybe for a third option at a third each, or switch to the wheel to watch the same draw land on a two or three segment wheel. Nothing leaves your browser and nothing needs an account.

Ask a questionAsk again with space · Nothing asked yet
Mode

No answer yet. Ask draws one from the browser's cryptographic generator; the question is not read.

Press Space to ask again without reaching for the mouse. The answer is drawn before it flickers or the wheel turns, so nothing on screen changes it. The tally counts every answer of this session; Reset tally clears it and the list. Only the mode is remembered between visits.

The theatre decides nothing. The answer is drawn from crypto.getRandomValues the moment you press Ask, by rejection sampling rather than a remainder, so every option has exactly the same chance. The flicker is a set of frames built to end on it, and the wheel's landing point is computed from it before the wheel starts to turn. A run of yeses is shown as a run, counted, because that is what fair randomness looks like: in eight fair coin flips, a run of three or more comes up more often than not.
Accuracy. Each answer is one draw from the browser's cryptographic random generator with an equal chance for every option, so yes and no are exactly as likely as each other. The tally counts this session's answers only.

Common questions

Is it really 50/50?
Yes. Each answer is one 32-bit value from crypto.getRandomValues, the browser's cryptographic generator, mapped onto the answer set by rejection sampling rather than a remainder, so no option is favoured by even a fraction. The draw happens the moment you press Ask, before anything moves on screen: the flicker in the plain modes and the turning wheel are both built afterwards from an answer that is already decided, so watching them cannot change it. The question you type is never read by the draw. It is echoed above the answer and kept with it in the log, nothing more.
Why is there a tally under the answer?
Because a page that only shows the latest answer makes a run of yeses feel like the universe has spoken. The tally counts every answer of the session, in the order the options are shown, and from two in a row it says so: "3 yes in a row". Runs like that are what fair randomness looks like. In eight flips of a fair coin, a run of three or more comes up more often than not. Reset tally clears the count and the log; closing the page clears them too, since only the mode is remembered between visits.
What does Maybe do to the odds?
It makes three options with a third each: yes, no and maybe are drawn from the same generator with the same rejection sampling, so none of the three is favoured. That also means yes drops from a half to a third, which is worth knowing if you are treating the answer as a nudge. The tally lists maybe even while it is at zero, so the odds you are playing with are always on screen.
Can I use it as a yes or no wheel?
Yes. Choose Wheel and the same draw is shown as a wheel with a fixed pointer at the top. It has two segments by default and three with Maybe on, it makes at least five full turns before settling, and the segment it stops on is the answer that was already drawn when you pressed Ask. The pointer is kept away from the lines between segments so a result never has to be argued over. If your system asks for reduced motion the wheel jumps straight to its final position instead of turning.
Does it remember my question?
Only for this session. The question is shown with each answer in the log of the last ten, and the log is gone when you close the page. Nothing is uploaded and there is no account. The one thing kept in this browser's storage between visits is which mode you left the tool in.
Can I ask again without the mouse?
Press the space bar while the focus is not in the question field or on a button and the tool asks again. The answer keeps the same odds every time: there is no memory between draws, so a no after three yeses was no more likely than a fourth yes.

Each answer is one draw from the browser's cryptographic random generator with an equal chance for every option, so yes and no are exactly as likely as each other. The tally counts this session's answers only.