TwirlseedPick a random number
Set a range, then pick one number or several without repeats.
Recent flips
How it stays fair
Every result comes from your browser’s cryptographic random source. Rejected draws remove rounding bias. The answer is chosen before the animation starts.
A real coin is not quite fair. In 350,757 hand flips, coins landed the same way up they started 50.8% of the time (Bartoš and colleagues, 2023). This one is exactly 50/50.
Each pick has an equal chance across the whole number range you set.