Games
Online Dice Roller
Roll one to twenty fair virtual dice with selectable sides and a modifier.
Online Dice Roller result
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How this tool works
Each die uses a Web Crypto random integer with rejection sampling from 1 through the selected die size (d4, d6, d8, d10, d12, d20, or d100); the tool totals up to 20 dice and applies the entered whole-number modifier.
Assumptions
Each die is an independent draw from 1 through the selected side count. The modifier is applied once to the sum, not once per die.
Limits to know
Changing the dice count, side count, or modifier clears the prior roll so an old result cannot be mistaken for the new configuration. Virtual rolls are for games and simulations, not regulated gambling or security decisions.