What is a coin flip?
Flipping a coin is the most universal and ancient way to make a random binary decision: you toss a coin in the air and, depending on which side lands up, you pick one option or the other. Pure 50/50 odds with no outside influence, no arguing and no one to blame for the result. That is why it has been used for over two thousand years — from ancient Rome, where it was called navia aut caput (“ship or head”), to the start of modern football matches.
This online version lets you flip a virtual coin from any phone, tablet or computer, with nothing to install and no real coin needed. The 3D animation mimics a real spinning coin, with a random duration and an unpredictable number of turns, so no two flips look the same.
When should you flip a coin?
The strength of a coin flip is its simplicity: just two options, each with equal weight. Some typical moments where it comes in handy:
- Everyday choices between two options: pizza or sushi, go out or stay in, movie or series.
- Who does a chore nobody wants: dishes, taking out the trash, driving tonight.
- Who pays the bill when there are two of you and you want to leave it to chance.
- Deciding who goes first in a board game, a card game or any two-player sport.
- Breaking a tie in a vote that is stuck at 1-1.
There is a mental trick many people swear by: the very moment the coin is in the air, you notice which result you were hoping for. That feeling already tells you what you really wanted, before you even see the outcome.
How does our virtual coin work?
When you flip (by tapping the coin, swiping up or using the button), the page generates a random number between 0 and 1 with the browser’s cryptographic generator (crypto.getRandomValues()). Below 0.5 it is heads; otherwise tails. Each outcome has exactly 50% probability, just like a balanced physical coin.
The flight you see is purely cosmetic: the height, the duration and the number of turns depend on how hard you swipe plus a little randomness, and the coin bounces on its edge before settling flat. But the flip is decided the instant you throw it, and the animation always ends on the correct side. Everything happens in your browser, with nothing sent to any server.
Frequently asked questions
Is the coin really balanced?
Yes. Heads is 50% and tails is 50%, generated by the browser’s cryptographic generator. There is no hidden bias.
Can I use the result for official draws?
We do not recommend it. The browser generator is cryptographic, but this site is not audited or certified, so avoid it for draws with legal or financial value.
Why do streaks of several heads in a row happen?
It is completely normal. In any random draw, streaks appear often. Each flip is independent of the previous one.
Are my flips stored on a server?
No. Everything happens in your browser. When you close the tab the counter disappears, and nothing is sent to our servers or third parties.
Does it work offline?
You need a connection the first time to load the page, but after that, flipping the coin doesn't need the internet: the draw happens inside your browser.
How do I use a coin toss to decide something?
Give each side an option before you flip (heads, we go out; tails, we stay in), tap the coin and go with what comes up. It works best for two options you would be happy with either way.
Related guides
- Coin flip: history and probability — From the Roman “navia aut caput” to the 350,757-flip study that measured a real coin's bias. History, science and famous coin-toss decisions.
- Who goes first? Who pays? — Randomness as the impartial referee of everyday standoffs: who starts the game, who pays the round, who does the dishes. A method for every case.