Need a quick yes or no, a fair way to decide who goes first, or someone else to blame for choosing the restaurant? This free coin flip tosses a coin in your browser and shows the result the moment it lands. Press Generate and the coin flies up towards you, turns over and settles on heads or tails. To flip again, press Generate, click the coin or press the space bar. The page opens on a single coin with the 3D toss switched on, and the gear button next to Generate opens Advanced Options, where everything else lives: Coins sets how many to toss at once, from 1 to 12, Heads means and Tails means let you write down what each side decides before you toss, and Random coin swaps the coin on this page for one from another country on every flip.
Every flip is made in your browser through the Web Crypto API (crypto.getRandomValues), a cryptographically secure generator seeded from your system's own source of randomness, designed so that its output cannot be predicted from what came before — unlike Math.random(), which is fast but was never designed for that. Each coin takes one random byte and reads its last bit: of the 256 values a byte can hold, exactly 128 give heads and 128 give tails. So the chance is not roughly half but exactly half, with no rounding and no step that could lean either way, and every coin in a batch is drawn on its own. The side is decided the instant you press Generate, before the coin leaves the ground. The animation only shows you a result that already exists, and nothing about the toss — its height, its spins, the design on the coin — can change it. Your flips are never sent to our server or recorded in its logs, and once the page has loaded it keeps working with the connection switched off.
The coin on the page belongs to the language you are reading it in. On this page it is a New Zealand one-dollar coin: King Charles III on the heads side and the kiwi on tails. Switch the page to another language and the coin changes with it, and so do the names of its two sides, which every language has its own words for. Whatever they are called, on this page heads is always the national side of the coin, with its coat of arms, emblem or portrait, and tails is the side that carries the value. Random coin replaces it with a coin from one of more than 60 countries on every flip, a different country for each coin when you toss several, and names the country and its currency beneath a single coin, or in a tooltip when there are several. Whichever coin you see, the side it lands on was chosen by the same random bit; the picture is decoration.
One coin lands in the middle of the result with its side written beneath it, followed by what that side means if you have filled it in: Tails — Sushi, for example. Several coins land three to a row, each turning at its own pace and labelled with its side once it lands, with a count of heads and tails beneath them; point at a coin to see what its side means and, with Random coin, where the coin is from. Switch off Animated 3D Coin when you would rather see the answer at once; the page also skips the animation if your device is set to reduce motion. From the second flip on, a line beneath the result keeps count for the whole session: how many heads and tails so far, the share of each, and the longest streak of one side. It lasts until you close the tab, and Clear starts it again. Copy All copies the result as text, one coin per line, and Save to File writes the same text to a plain .txt file. History keeps your last 10 flips in this browser, together with the coins they were shown on, and your settings, including what each side means, are remembered for the next visit.
A coin is at its best when both choices are genuinely acceptable and the time spent deliberating has overtaken the difference between them. Write the options into Heads means and Tails means before you flip, so nobody can reinterpret the result afterwards. With three or more options a coin is the wrong tool; list them in the Random Picker instead. If one toss feels too abrupt, agree on best of three: set Coins to 3 and let the majority decide. It makes the moment last longer, not the odds better — the majority of three fair coins is still exactly 50/50. There is also a quieter use. While the coin is in the air, many people discover which side they are hoping for, and that hope is the answer they were looking for; the Danish poet and scientist Piet Hein put the idea into a short verse. Following the coin can also go better than people fear. In a study by the economist Steven Levitt, people stuck on a decision flipped more than 20,000 virtual coins, and on big choices such as leaving a job, those whose coin told them to make a change were happier six months later than those whose coin told them to stay put.
A coin has no memory. After five heads in a row the next flip is still exactly 50/50: nothing in a coin, and nothing on this page, keeps score or tries to even things out. The feeling that tails is now due is so common that it has a name, the gambler's fallacy. The opposite feeling misleads just as often: a streak looks suspicious, but streaks are exactly what a fair coin produces. In 20 flips, the chance of at least four of the same side in a row is about 77%, and in 100 flips a run of five or more happens about 97% of the time, with the longest run usually around seven. Five heads in a row from the very first flip is 1 in 32 — unusual for any five flips named in advance, but almost certain to appear somewhere in a long session. The session count shows your longest streak, so you can watch it happen.
Fair does not mean even. Exactly 50/50 is a promise about each flip, not about how a handful of flips will add up. Toss 12 coins and the most likely single result is six heads and six tails, yet it turns up only about 23% of the time; five, six or seven heads together cover about 61%, and all twelve on the same side happens about once in 2,048 tosses. Over 100 flips, exactly 50 heads comes up only about 8% of the time, while a share between 45% and 55% comes up about 73% of the time. The share does drift towards half as flips pile up — after 1,000 flips it lies between 48% and 52% about 80% of the time — but it gets there slowly, and never because the coin corrects itself: the early flips are simply outweighed by the many that follow. So a session count of 7 heads to 3 tails is no sign of a broken coin, and neither is a batch of 12 that comes out 8 to 4.
Why choose this coin flip?
- Every flip made in your browser with the Web Crypto API, nothing uploaded
- Exactly 50/50: one random byte per coin, 128 values for each side
- The side decided before the toss, never by the animation
- Up to 12 coins at once, with a count of heads and tails
- A real coin in 3D, matched to your language, or Random coin from more than 60 countries
- Heads means and Tails means, so the decision is written down before the flip
- A session count with each side's share and your longest streak
- Flip again with a click on the coin or the space bar, plus Copy All, Save to File and History
- Free and unlimited: no sign-up, no quota, nothing stored on our servers
Coin tosses settle things wherever two outcomes need an impartial referee. Team captains call one for kick-off, ends or who bats first, board and card games use one to decide who starts, and friends use one for who pays, who drives or which film to watch. When a game needs more than two outcomes, the Dice Roller is the natural next step. Teachers use it to make probability visible: twelve coins at once give a class a ready-made experiment in how results spread, and the session count lets everyone watch the share of heads wander and slowly settle. People testing an idea use it to assign two options at random — which version of a page a visitor sees, which of two methods is tried first — so that their own preferences cannot creep in. And for anyone stuck between two acceptable choices, it ends the deliberation, or at least shows which way they were already leaning.
A few honest limits are worth knowing. This is a virtual coin, so it lands on heads or tails and nothing else: it cannot land on its edge, roll away or be caught in mid-air, and there is no way to weight it. For a number from a range rather than one of two sides, use the Random Number Generator. The animation is a picture of the result rather than a simulation of physics, and the coins are photographs chosen for their design, not a guide to what is in circulation today. A real coin behaves a little differently. Persi Diaconis, Susan Holmes and Richard Montgomery predicted in 2007 that a hand-flipped coin tends to land on the side that started facing up, and František Bartoš and colleagues confirmed it with 350,757 flips, published in 2025, which landed on their starting side about 50.8% of the time. The lean favours whichever side started up, so a real coin comes out even only when the starting side is itself chosen at random. Here there is no starting side and no thumb, and the result does not depend on the throw at all. What it does guarantee is narrower and exact: every coin has the same chance of heads and tails on every press, drawn from your browser's cryptographic source and never sent to our server.