擲硬幣

How to use

1. Tap the coin, click Flip Coin, or press Space to flip.
2. The result — Heads or Tails — is shown below the coin with a flip animation.
3. The URL updates with the result so you can share it with someone else.

常見問題

Is it a fair 50/50 flip?

Yes. Each flip uses a single random bit from crypto.getRandomValues(), giving exactly 50% probability for heads or tails.

Does my data leave my device?

No. Everything runs in your browser. The result is only in the URL if you choose to share it.

Does it work on mobile?

Yes — tap the coin or the button. Optimized for iOS Safari and Android Chrome.