Korokoro コロコロFair dice, with the odds of every throw

A dice roller and a dice notation parser with exact odds. A typed API, a command line, and a tray that runs anywhere.

Exact odds

Worked out and never simulated, for every notation it reads, from 2d6 to floor(4d6/2) and a pool of exploding d10.

Every die from a d2 to a d1000, Fate dice, dice of your own, keep and drop, rerolls, explosions, successes, arithmetic.

Dice you tap, real dice sounds, history, stats and a link to any roll. For React, Vue, Svelte, Angular, or any page as a web component.

koro 2d20kh1+5 in a terminal on Linux, macOS and Windows, with JSON and CSV for other programs.

The dice of Yahtzee, craps, Risk, chō-han and the rest, each read the way the game reads it.

A seeded roll replays die for die, and a specification and a conformance suite say how, for ports to other languages.

Try it here: 2d20kh1+5