pick a die, choose how many, roll. tap the dice or press space to roll again.
yes. each die uses your browser's cryptographic random number generator, with rejection sampling, so every face has exactly the same chance.
pick d6, set dice to 2 and the modifier to +3. the total includes the modifier, and the breakdown shows each die.
a die with 20 sides. 3d6 means three six-sided dice added together, and d100 rolls a number from 1 to 100.