Coin Flip — heads or tails online
Flip a coin online — one big heads-or-tails result, or flip up to 100 at once and see the counts and sequence. Crypto-fair, in your browser.
🔒 Runs entirely in your browser. Your input and output are never sent to a server or stored — fully private.
Cryptographically fair — every flip is 50/50, in your browser.
About this tool
This coin flipper tosses anywhere from a single coin to a hundred at once, right in your browser. Use one flip to settle a quick decision — heads or tails — or flip a large batch to watch the heads and tails counts add up. Each toss is decided by your browser's cryptographic random number generator, so it is a genuine fifty-fifty with no weighting or bias. It is handy for making choices, breaking a tie, kicking off a game, or demonstrating probability with a big sample.
Frequently asked questions
Is each flip a true fifty-fifty?
Yes. Every toss is drawn from your browser's cryptographic random number generator, which gives heads and tails an exactly equal chance with no lean in either direction. Unlike a real coin, there is no spin, weight or worn edge to nudge the result, so the odds are a clean fifty percent each time. Across many flips the split naturally drifts toward an even half-and-half.
Why would I flip many coins at once?
Flipping a big batch is a quick way to see probability in action. With just a few coins the heads-to-tails split can look lopsided, but as you flip dozens or a hundred the counts settle closer to an even fifty-fifty — a hands-on demonstration of the law of large numbers. It is also useful for classrooms, statistics examples, or any game that calls for many simultaneous tosses.
Does the coin flipper run entirely on my device?
Yes. The flips are generated by local JavaScript in your browser, so no result is ever uploaded to or recorded on a server. Once the page is loaded it keeps working offline, and each outcome exists only on your own device. That makes it both private and instant — there is no network round-trip between pressing flip and seeing the result.