Online coin flip
One flip, a short series, or a best-of call.
Tap Flip
Recent flips
Your last flips will line up here. Nothing is chosen until you flip.
Each tap is a new pseudorandom draw via crypto.getRandomValues. Not atmospheric noise. How the draw works
About this page
This page is the dedicated coin, for when the homepage flip is not enough. You can take a single heads-or-tails draw, list three, five, or ten flips in one tap, or run a best-of series. Best of 3, 5, and 7 each draw that many independent results and name the side that appears more often. Because the count is odd, one side always leads. The coin face shows the last flip in the series, and the sentence above the button states the full count. Nothing is pre-rolled when the page loads. Keyboard users can press Enter or Space when focus is not inside a control, or focus the Flip button and activate it there. Reduced motion skips the turn and shows the side immediately.
Related
Questions
What does best of N mean here?
Best of 3 draws three flips and reports whichever side appears at least twice. Best of 5 needs three of a kind in the count, and best of 7 needs four. The flips are separate draws, not one number that we then label. A 2–1 result is a normal best of 3. It is not a hint about the next series. On a fair mapping, each side is an underdog and a favorite only after the flips exist.
How is a multi-flip different from tapping Flip over and over?
A multi-flip button draws the whole list in one action and prints every side, so a group sees the set together. Tapping one flip at a time is the same kind of draw, just paced by you. The history strip records the summary line, not a promise that the next summary will balance the last one. Ten flips can still come up seven heads.
What is the chance of three heads in a row?
If each flip is an even two-way draw, three heads in a row is 1 in 8. That is the product of three independent one-half chances. It is uncommon and still ordinary. The page does not block streaks, and it does not insert a tails to make the strip look balanced. If your rule was 'first to three,' stop when you reach it instead of reading a pattern into later flips.
Can I run the flip from the keyboard?
Yes. The Flip control is a button, so Enter or Space activates it while it is focused. If focus is on the page background, those same keys start a flip without scrolling away from the tool. If focus is in a link or another button, the key keeps its normal job. Reduced-motion users still get the result. The animation is only a reveal.
Why might two browsers disagree?
They should. Each browser draws its own values. There is no shared seed and no room code in this version. Two phones on the same page are two coins. If you need one public result, flip once on a screen everyone can see and read the sentence out loud. Do not average two phones.
When should I leave this page for another tool?
Leave it when the choice is not two-sided. A roster belongs on the name picker. A range such as 1 to 100 belongs on the number tool. A sum of two six-sided dice belongs on the 2d6 page, because a coin cannot represent 36 equally likely pairs. Scientific work that needs a published entropy source should use a true-random service rather than this utility.