Exploding Dice Roller
What exploding dice are
Exploding (or “open-ended”) dice let a single die keep climbing: whenever it lands on its highest face, you reroll it and add the new result, and you keep going for as long as it keeps maxing. A d6 that rolls 6 + 6 + 3 totals 15. This roller shows each die's full chain and the grand total across all dice.
Pick a standard die (d4, d6, d8, d10, d12, d20, or d100) or type any custom size from 2 to 1000, set how many dice to roll (1–20), and roll. The chains and total stay on your device.
Use cases
- Roll Trait and damage dice for Savage Worlds, where every die explodes (“acing”)
- Resolve open-ended d10 checks for Feng Shui and similar systems
- Roll exploding step dice for Earthdawn or escalating dice for Hackmaster
- Settle any house rule where maxing a die means roll again
Standard exploding only
Each die is rerolled and its full value is added every time it shows the maximum face — the classic exploding rule, not penetrating (which subtracts one from the reroll) or compounding (which folds the rerolls into one larger die). A safety cap of 100 rerolls per die guarantees the chain always terminates, though fair dice effectively never reach it.
Cryptographically secure randomness
Every roll uses the Web Crypto API (crypto.getRandomValues) directly in your browser. No die is ever sent to a server, and there are no network calls or stored input.