Coin Flip

How It Works

A coin flip is the simplest fair decision there is — two outcomes, each with a 50% chance — and this one uses your browser's secure random source, crypto.getRandomValues(), so the result is genuinely unpredictable instead of a predictable pattern. The coin spins in a short animation, then lands on heads or tails, and the running counts update so you can see the balance over many flips.

Every flip is independent. That means a run of five heads in a row does not make tails "due" — the next flip is still exactly 50/50. The streak tracker shows how long the current run has lasted, which is a fun way to see how often streaks happen by pure chance: in 100 flips, a run of five or six in a row is completely normal, not a sign that the coin is rigged.

Worked Example

Imagine settling who goes first in a board game. You flip three times: Heads, Heads, Tails. The counts now read Heads 2, Tails 1, total 3, and the streak shows Tails ×1 — the last flip broke the heads run. If you had called "heads wins," the first player would be decided on the very first flip, and the later flips would just be for fun.

How to Use This Tool

Click Flip the Coin and watch it spin — the result appears as soon as it lands. Keep flipping to build up the counts and see your streaks, or press Reset to start a fresh session with zeroed counts. There is nothing to set up and no sign-up: it works the moment the page loads.

Tips and Practical Advice

Agree on the stakes before you flip, not after — "heads, we go to the beach; tails, we stay home" works best when both sides accept the result in advance. For a best-of-three decision, flip three times and take the majority; it feels fairer than a single flip and still takes only seconds. And if you are flipping to break a tie at work or in a club, the visible counts make the result easy to show everyone in the room.