Coin Flipper

About This Coin Flipper

This free online coin flipper simulates flipping a fair coin with true randomness powered by your browser's cryptographic random number generator (crypto.getRandomValues()). It includes a flip animation, complete history log, running statistics, and streak tracking.

How to Use

1. Click the "Flip Coin" button to flip the virtual coin.
2. Watch the coin animation and see the result (Heads or Tails).
3. View your running statistics: total flips, heads/tails counts and percentages.
4. Check your current streak of consecutive same-side results.
5. Review the complete flip history below the statistics.
6. Click "Reset" to clear all history and start over.

Frequently Asked Questions

Is this coin flip truly random?

Yes. This tool uses the Web Crypto API (crypto.getRandomValues()), which provides cryptographically secure random numbers. This is far more random thanMath.random() and produces a fair 50/50 outcome.

Can I use this for making decisions?

Absolutely. A coin flip is a classic method for making binary decisions. This tool provides a fair, unbiased result each time. It is perfect for settling disputes, making quick choices, or any situation where you need a random yes/no outcome.

Why does the percentage not show exactly 50/50?

With a small number of flips, it is normal for the percentage to deviate from exactly 50/50. This is expected statistical variation. As you flip more times, the percentages will tend to converge closer to 50% for each side, demonstrating the law of large numbers.

What is a streak?

The streak counter shows how many consecutive flips have landed on the same side. For example, if your last 4 flips were all Heads, your streak is "4 Heads Streak." The streak resets when the opposite side appears.

Is the flip history saved?

The flip history is stored in your browser's memory during your current session. It is not saved to any server or persistent storage. Refreshing the page or clicking Reset will clear all history.