What dice notation is supported?

Standard NdS notation — for example 3d8 or 1d20 — plus an optional +/- modifier and an optional keep-highest or keep-lowest clause written as khN or klN, such as 4d6kh3.

Are the rolls genuinely random?

Yes. Every die uses the browser's Web Crypto API with modulo bias removed, so each face is equally likely on every roll — no predictable pseudo-random sequence.

Is my roll data sent anywhere?

No. All parsing and rolling happens locally in your browser. Nothing is uploaded, logged or recorded.

D&D Dice Roller — Gera Tools

D&D dice roller with notation

Roll using the dice notation you already know from the table — NdS with an optional +/- modifier and keep-highest / keep-lowest clauses. Type 4d6kh3 to roll four six-sided dice and keep the best three (the classic ability score roll), or 1d20+5 for an attack with proficiency.

Each die is rolled with the browser’s Web Crypto API, so every result is fair. You see the individual dice, which were kept, the modifier and the total. Everything runs in your browser — nothing is uploaded.