Is it fair?
Yes. Each flip takes one random bit from crypto.getRandomValues, the cryptographically secure generator built into your browser, so heads and tails each have exactly a 1 in 2 chance. The animation is decided after the result, not the other way around.
Why streaks happen
Runs of five or six heads in a row feel suspicious, but they are normal. In 100 fair flips, the longest run of the same side is usually around six or seven. Flip 1,000 times and watch the percentage settle close to 50% while streaks still appear — that is what randomness looks like.
A real coin isn’t quite 50/50
A 2023 study that recorded 350,757 real coin flips found coins land on the same side they started on about 50.8% of the time. A virtual coin has no starting side, so it doesn’t have that bias.
Frequently asked questions
What are the odds of 3 heads in a row?
1 in 8 (½ × ½ × ½), or 12.5%.
Can I use this to settle a bet?
It is as fair as a coin can be. Agree on heads or tails before you flip.
Sources
Last reviewed 2026-10-14.