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How Our Coin Flip Simulator Works

How It Works

This coin flip simulator uses cryptographically secure random number generation to ensure fair and unbiased results, closely mimicking the randomness of a physical coin flip.

Instead of using JavaScript's standard Math.random() function, which generates pseudo-random numbers, we utilize the Web Crypto API's getRandomValues() method. This API provides true randomness by accessing the operating system's cryptographically secure random number generator.

Here's how the randomization works:

  • We generate a random byte (0-255) using crypto.getRandomValues(new Uint8Array(1))
  • If the value is less than 128, it's heads; if it's 128 or greater, it's tails
  • This creates a perfect 50/50 probability split, as 0-127 and 128-255 each contain exactly 128 numbers

The result is a truly random coin flip simulation that's as fair as a physical coin toss, making it reliable for decision-making purposes.