Coin Flip & Dice Roller
Fair, instant randomness for games and decisions — powered by your browser's cryptographic generator.
🪙 Coin flip
🎲 Dice roll
Can you trust an online coin flip?
You can trust this one: every flip and roll uses crypto.getRandomValues(), the browser's cryptographically secure random source. There is no pattern to learn and no bias to exploit — each outcome is independent, exactly like a physical coin or die, and fairer than a worn one.
Frequently asked questions
What does “best of 3” mean for a coin?
Flip three times and the majority wins — handy for settling a debate or deciding who goes first with less chance of an unlucky single flip.
What is a d20?
A 20-sided die, iconic in tabletop role-playing games. This roller supports d4 through d20, and rolling multiple dice shows the individual results and the total.