A fair coin, a genuine 50/50
Every flip uses your browser’s secure random number generator, the same one used to create passwords. Both sides have exactly the same chance and each flip is independent of the last: getting heads five times in a row does not make tails any more likely next time.
Best of 3 or best of 5
If one flip feels too quick, choose “Best of 3” or “Best of 5”. The first side to reach 2 or 3 flips wins, and the score is shown under the coin. It is the fairest way for two people to decide who picks the film, who goes first or who does the washing-up.
Your coin, your colours
Write whatever you like on each side: “yes” and “no”, two names, two restaurants or two teams. Pick a colour for each side or use one of the quick combinations, such as gold and silver or pink and blue, which also works for a gender reveal party. Whether you call it a coin flip, a coin toss or heads or tails, it is the same game.
Frequently asked questions
Is the coin really random?
Yes. We use the browser’s secure random generator (crypto.getRandomValues), so each side has a 50% chance on every flip.
Can I change what each side says?
Yes. Type the name of each side under “The two sides”, for example “yes” and “no” or the names of two people, and choose its colour. The coin updates instantly.
How does best of 3 or best of 5 work?
Choose the mode under “Game”. The first side to reach 2 flips (best of 3) or 3 flips (best of 5) wins. When it is over, press “Play again”.
Is a real coin flip exactly 50/50?
Almost, but not quite. Studies of real tosses found a coin tends to land on the same side it started on slightly more often, about 51% of the time. An online coin has no thumb or starting side, so it is a true 50/50.
Are my flips saved?
The counters and history stay on this page while it is open. Your coin’s names and colours are remembered in this browser.
Is it free?
Yes. Flip the coin as many times as you like, with no sign-up, on your phone or computer.