Coin Flip

Flip a coin online

A simple, fair coin flip when you don't have a coin handy — or when you need to flip hundreds at once. Each flip is a 50/50 call decided by your browser's cryptographic randomness, so heads and tails are equally likely every single time, with no bias and no pattern.

Making a decision with a coin

A coin flip is the classic way to settle a two-way choice fairly: assign one option to heads and the other to tails. There's a well-known trick, too — if you flip and feel a flash of disappointment at the result, that reaction tells you which option you actually wanted. The coin doesn't decide; it reveals.

The law of large numbers

Flip once and you get heads or tails. Flip a thousand times and the split lands close to 50/50 — but rarely exactly. This is the law of large numbers: individual flips are unpredictable, yet the proportion converges on the true probability as the count grows. Use the multi-coin mode to watch it happen: small batches are streaky, large batches settle near even.

FAQ

Is the flip truly 50/50?

Yes. The tool maps cryptographic randomness to two equally sized outcomes, so neither side is favored. A real coin is actually slightly biased toward the side facing up when flipped — a digital flip removes even that.

Can I flip more than two outcomes?

For more than two choices, use a dice roller or a random picker instead — a coin only has two sides.

Is the coin flip free to use?

Yes, completely free with no sign-up or limits. Flip a single coin or run thousands of flips at once to watch the heads/tails split settle toward 50/50.

Does the flip run in my browser?

Yes. The randomness comes from your browser's built-in cryptographic generator and everything happens on your device — nothing is sent to a server, so your flips stay private.

Can the result be predicted or rigged?

No. Each flip uses cryptographically secure randomness, which is designed to be unpredictable and unbiased. There is no hidden pattern, streak logic, or way to favor one side.

Does it work on mobile?

Yes. The coin flip works in any phone or tablet browser, so you can settle a quick decision on the go without installing an app.