Coin Flipper — Heads or Tails, One or Many
Flip a coin online — one flip, or run up to 10,000 flips to see heads/tails distribution and longest streaks. Uses cryptographic randomness by default.
Runs 100% in your browser — nothing is uploaded.
Frequently asked
Is it truly random?
When cryptographic randomness is enabled (the default), each flip pulls a fresh byte from crypto.getRandomValues() — the same source browsers use for keys and tokens. Uncheck it if you want the faster but weaker Math.random().
Why show longest streaks?
People underestimate how long "random" streaks get. In 100 fair flips, a streak of 6+ heads or tails is more likely than not. The streak column is there to demonstrate that.
What is the max flip count?
10,000 flips per run. Big enough to see the distribution approach 50/50, small enough to render the full sequence quickly.
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