Animated Coin Flipper

A tactile heads-or-tails coin flip with accessible animation, unbiased Web Crypto randomness, and a private session history.

Flip a fair coin

Each flip uses one unbiased bit from the browser's cryptographic random source.

Flip the coin to get a cryptographically random result.

The outcome comes from one bit generated by the browser's Web Crypto API. Heads and tails each map to one of the two possible bit values.

The animation shows the already selected result; it does not use animation timing or Math.random to decide the outcome.

P(Heads)=P(Tails)=\frac{1}{2}

Input

Press Flip coin

Show result

Result

Heads or Tails with equal probability

Is the flip stored?

Only the ten most recent flips are kept in page memory. They are not uploaded or saved.

Does reduced-motion preference work?

Yes. The visual transition is shortened when reduced motion is requested.

Gaming

Roll standard or custom dice, use mixed notation, apply modifiers, and keep the highest or lowest results.

Generators

Generate 1 to 1,000 random integers or fixed-precision decimals, with optional uniqueness and sorting.

Generators

Shuffle names, tasks, or any line-separated list into a new random order.

Generators

Pick one or more names from a class list, meeting roster, giveaway, or group.