3 Services from dice.openverbs.com

Computes the exact probability distribution (mean, variance, standard deviation, min/max, full PMF) of any dice notation string without sampling.

Parses dice notation strings (e.g. '3d6+2', '4d6kh3', '2d20dl1') into structured terms describing dice count, sides, modifiers, and keep/drop rules

Rolls any standard dice notation (e.g. 4d6kh3) using a cryptographically secure RNG, returning per-die results, kept dice, and totals for one or more independent rolls.