Is this Yes/No flip truly random?
Yes — and in one specific way, it is more random than tossing a physical coin. Each flip draws a random byte using your browser's cryptographically secure random number generator (the Web Crypto API used for web encryption keys) and checks its lowest bit. Of the 256 possible byte values, exactly 128 produce a "Yes" and 128 produce a "No". This guarantees a mathematically exact 50% probability with no bias, no pattern, and no memory of previous flips.
Real coins are (slightly) biased
Physical coin tosses are not perfectly 50/50. Research led by Persi Diaconis — and backed by a 2023 study analyzing over 350,000 physical flips — revealed that a caught coin lands on the same side it started on roughly 51% of the time due to subtle precession (wobble) in a human toss. Digital flipping removes physical dynamics entirely, ensuring pure 50/50 chance every single time.
Frequently Asked Questions
Is an online Yes/No coin flip strictly 50/50?
Yes. Each flip evaluates a byte from your browser's Web Crypto API. Exactly 128 values result in "Yes" and 128 result in "No", giving an exact 50% mathematical probability for both choices.
After getting several "Yes" outcomes in a row, is "No" due?
No. Every flip is completely independent. Even after five "Yes" outcomes in a row, the next flip still has an exact 50% chance of landing on "Yes" and 50% on "No". Expecting the outcome to change simply because of prior flips is known as the gambler's fallacy.
Are my flips or results stored anywhere?
No. Flips run instantaneously inside your browser. No entries, history, or session data are recorded or transmitted to any server.
Need options beyond a simple binary choice? Try the Dice Roller for multi-sided random rolls, or generate custom number sets with the Random Number Generator.