FAQ

Heads or tails is a decision method using a two-sided coin. One side ("heads") shows a face or portrait, the other ("tails") shows the reverse design. Flipping the coin and seeing which side lands up gives a random, unbiased way to choose between two options.

An online coin flip uses your browser's random number generator to pick one of two outcomes — heads or tails — with equal probability, then displays that result with a short animation. Flip-a-Coin uses the Web Crypto API for a cryptographically strong random value rather than a weaker pseudo-random function.

Yes. Flip-a-Coin generates each result using window.crypto.getRandomValues(), the same secure randomness source browsers use for cryptography, rather than relying only on Math.random(). Each flip is independent, with heads and tails equally likely.

Yes, the coin flip tool at Flip-a-Coin is completely free, requires no account, and has no usage limit.

Yes. You can flip once, or use the multi-flip options to flip 5, 10, 25, 50, or a custom number of times in a row, and see a running heads/tails count and percentage.

For a single fair flip, the probability of heads is 50% and the probability of tails is 50%. Over a small number of flips, results can vary noticeably from 50/50, but the long-run frequency approaches an even split as the number of flips grows.

Yes. The tool is built mobile-first and works with touch, on-screen taps, and keyboard input, and adapts to phone, tablet, and desktop screens.

A coin flip simulator is software that mimics a physical coin toss by generating a random binary outcome — heads or tails — instead of using a real coin. It is useful for quick decisions, games, probability demonstrations, and classroom activities.