Coin Flip

Settle it with a flip — or stress-test the law of large numbers with ten thousand of them. Each flip is a single unbiased cryptographic draw: Heads or Tails, exactly 50/50 by construction.

What a long run of flips shows

Flip once and the result is pure chance. Flip 10,000 times and the split will almost always land close to 50/50 — typically within a percent or so either way — without ever being exactly even. That gap is not the coin being unfair; it is what randomness actually looks like. Streaks are part of it too: in 100 flips, a run of six or more Heads in a row is more likely than not. A fair coin produces clusters, and any tool that quietly "smooths them out" would be lying to you. This one doesn't.

One practical note for decisions that matter: a coin flip settles who chooses, it does not make the choice fair. For a high-stakes draw, agree the rules before you flip, and use a method everyone can verify.

FAQ

Is this coin really 50/50?

Yes. Each flip draws one byte and maps it through rejection sampling onto two outcomes — 128 byte values for Heads, 128 for Tails. Neither side has an extra path to occur.

How many flips can I run at once?

Up to 10,000. Long runs show the running totals and each side's percentage instead of listing every flip.

Does a long Heads streak mean Tails is "due"?

No — that's the gambler's fallacy. Every flip here is independent; the coin has no memory and nothing to repay.

Can I use this for a contest or giveaway?

For informal decisions, happily. For anything regulated, use a verifiable, audited drawing process instead.