Play & Cognition · Free Tool
Dice & Coin Simulator
Flip a fair coin or roll dice of any type — d4 to d100 — with cryptographically-random results, a running tally and history. No ads, no tracking, all in your browser.
How many
Sides
How many
How it works
Every roll and flip uses crypto.getRandomValues — the browser's cryptographically-secure random source — with rejection sampling so each outcome is exactly equally likely (no bias from the modulo operation). Nothing is sent anywhere; the randomness is generated on your device.