Cadmeo

Fun Tools

These fun tools make a decision or fill a moment: a coin flip, a dice roll, a spun wheel, a drawn card or a timer. All 13 run in your browser, and every draw uses a genuine random source.

13 tools

What is in here

The 13 tools split into deciders and diversions. Deciders settle something: a coin flip, a dice roll, a wheel spin, a weighted pick where the options are not equally likely, a partner pairing or a number drawn from a range. Diversions pass time: a click speed test, a magic 8 ball, a bingo caller, a countdown timer and a football squares grid.

Every draw uses the browser cryptographic random number generator, not Math.random. For a coin flip the odds are exactly even, and for a wheel every slice is the same size unless you choose the weighted picker instead, which shows each option chance as a percentage before you draw.

The weighted picker and the wheel spinner answer different questions and are easy to confuse. The wheel gives every option an identical chance. The weighted picker gives them deliberately unequal odds and states those odds up front.

Frequently asked questions

Is the coin flip here actually 50/50?

Yes. Each flip reads a fresh value from the browser cryptographic random number generator and maps it to two equally sized outcomes, with rejection sampling so no bias creeps in. A run of the same result is ordinary in a fair sequence rather than evidence of a fault.

Can I trust a wheel spin for something that matters, like a prize draw?

The draw itself is fair, using the same cryptographic source as the other tools. What the page cannot provide is a record: nothing is logged, so there is no independent evidence of the result afterwards. For a draw somebody may dispute, take a recording or use a service built to produce an audit trail.

Why does the same name come up twice in a row on the wheel?

Because each spin is independent by default, which is what fairness means here. Over 100 spins of a 10-option wheel, a repeat is expected rather than surprising. The wheel also offers a setting to remove each winner, which turns the sequence into a draw without replacement.

Does the countdown timer keep time when I switch tabs?

Yes. It reads the system clock rather than counting intervals, so a browser throttling the background tab does not cause drift. There is no alarm sound, since a tab that plays audio without warning is worse than one that does not.