Coin Flip — Heads or Tails, Truly 50/50
Flip a virtual coin online. Two segments, 50/50 odds, crypto-secure randomness, and a shareable URL so the other player can audit the spin.
The Coin Flip is the simplest wheel we make: two equal segments, one for Heads and one for Tails. The randomness comes from your browser’s crypto API — the same source used for cryptographic keys — so it is genuinely 50/50, no software cheating. When two people need to settle something fairly across distance, the shareable URL means everyone is looking at the same wheel.
How to use it
- Press Spin (or Ctrl/Cmd + Enter) and wait for the pointer to land.
- Use Weighted mode if you want a deliberately biased coin (training, demos).
- Add a third option like “re-spin” for tie-breakers.
- Share the URL so the other person sees the same wheel before the flip.
Use cases
- Settling who pays for dinner when neither side will commit.
- Sports captains picking the kickoff side without a physical coin.
- Deciding who goes first in a board game when no dice are at hand.
- Two friends in different cities settling a bet on a call.
- Tournament tiebreakers when match results are level.
- Quick yes/no calls when even a wheel feels like too much.
Frequently asked questions
Is the coin flip truly 50/50?
Yes. Two equal segments + crypto-secure RNG = exactly 50% probability per outcome. Run 1,000 flips and the split converges to 500/500 within statistical noise.
Why not just flip a real coin?
A real coin works when both parties are in the room. Online, a shareable URL is the “same coin”: anyone with the link sees the same wheel and witnesses the same spin. It’s also handy when you don’t have a coin nearby.
Can I make the coin biased on purpose?
Yes — switch to Weighted mode and set the probabilities (e.g. Heads=70, Tails=30). Useful for teaching probability or running biased-coin demos.
Does the flip work without an internet connection?
Yes — once the page is loaded, the randomness happens locally in your browser. No network round-trip per flip.
Can I add more sides like a die?
Yes — add as many entries as you like and the wheel turns into a virtual die. For a 6-sided die, use the Random Number wheel preloaded for that exact case.