Coin Flip
Flip a fair coin as many times as you like — each result comes from your browser's cryptographically secure random source, so heads and tails are equally likely every single time, with no hidden patterns. The tally keeps count across flips so you can settle best-of-three, best-of-five, or a best-of-nineteen argument.
The classic use is the decision you already know the answer to: flip the coin and notice which side you were hoping for while it spins. For group decisions, the tally doubles as a neutral referee.
How to use
- Press Flip — the coin lands heads or tails instantly.
- Keep flipping for best-of series; the running tally tracks heads, tails and total flips.
- Hit Reset to clear the tally for the next decision.
Frequently asked questions
Is this online coin flip fair?
Yes — each flip uses the browser's WebCrypto secure random source, the same class of generator used for encryption. Every flip is independent and exactly 50/50 in expectation.
Can I use this for a sports coin toss?
You can, but a physical coin is more ceremonial. This version is handy for remote games, online debates and quick decisions where nobody has a coin.
What are the odds of flipping 5 heads in a row?
1 in 32 (2 to the power of 5, about 3.1%). The tally makes it easy to spot streaks — which appear more often than intuition expects, a famous quirk of true randomness.
Does the coin remember previous flips?
No — every flip is independent. The tally is just for record-keeping; past results have zero influence on the next flip.