Coin Flip
Coin Flip is a free decision tool that runs directly in your browser with no account required.
About this tool
A virtual coin toss with a 3D flip animation, backed by the browser's cryptographic random number generator instead of a wobbly thumb. Flip once for a quick yes-or-no call, or run up to 100 flips at a time and get the full sequence plus a heads-versus-tails tally, which is also a neat way to demonstrate probability to students.
How to use
- Set Number of flips to 1 for a single decision or up to 100 for a batch.
- Press the flip button and watch the coin spin and settle on the first result.
- Review the headline result, the heads and tails counts, and the numbered list of every flip.
Frequently asked questions
Is the coin flip truly 50/50?
Each flip draws from crypto.getRandomValues, the browser's cryptographically secure random source, with two equally likely outcomes. Unlike a physical coin, there is no bias from weight, spin technique, or catching style.
What happens when I flip more than one coin?
Every flip is independent and listed in order, the animation shows the first result, and the metrics report how many heads and tails occurred across the batch. The maximum is 100 flips per run.
Why did I get several heads in a row?
Streaks are normal in genuine random sequences; five heads in a row has about a 3 percent chance in any five flips and will appear regularly across many runs. Past flips never influence the next one.
What is this useful for besides settling arguments?
Common uses include choosing who goes first in a game, breaking a deadlocked two-option decision, randomizing A/B assignments informally, and classroom probability experiments using the multi-flip tally.
Does the flip animation affect the outcome?
No. The result is drawn before the animation starts, and the coin simply rotates to land on the face that was already selected.