Dice Roller
Roll d4 through d20, up to 10 at a time, with instant totals — cryptographically fair and never tracked.
Your files never leave your device.
How to roll
- Pick the die — d6 for board games, d20 for D&D checks, d4 for that dagger damage.
- Set the count — up to 10 dice at once.
- Roll. Each die pops in with its result and the total appears below.
Fairer than plastic
Physical dice have manufacturing flaws — slightly rounded edges, uneven weight, a face that loves coming up. This roller has none of that: every result comes from crypto.getRandomValues(), the cryptographically secure random source built into your browser and used for security-critical operations. Each face has a mathematically equal chance, every roll is independent, and there's no server in the middle that could remember or repeat a sequence. For tabletop nights, that means the dice are fairer than the ones in the box.
Common rolls, covered
- 2d6 — the classic board-game roll (Settlers of Catan, Monopoly, backgammon).
- 1d20 — attack rolls, saving throws and skill checks in D&D and similar systems.
- 2d20 — advantage/disadvantage: roll two, take the higher or lower.
- 4d6 — ability-score generation (drop the lowest if your group plays that way).
- d10 pools — World of Darkness and similar systems that count successes across many dice.
Classroom use
Teachers use dice rollers for probability lessons — roll 10 d6 a few times and watch the distribution flatten, or track totals across rolls to show how 2d6 clusters around 7. Because results are cryptographically fair and the tool keeps no history, every roll is a clean sample. It also works offline once loaded, which helps in classrooms with unreliable internet.
A quick probability snack
Watch the totals when you roll several dice: 2d6 lands on 7 six times more often than on 2 or 12, because only one combination makes the extremes (1+1, 6+6) while six combinations make 7. That's why game designers build around the middle of the range. Roll a batch of ten dice a few times and you'll see the totals cluster near the middle almost every time — the bell curve made visible, right in your browser tab.
Frequently asked questions
Are the dice rolls truly random?
Yes. Each die uses crypto.getRandomValues — the browser's cryptographically secure generator, the same source used for encryption keys. Every face has an exactly equal chance.
Which dice can I roll?
d4, d6, d8, d10, d12 and d20 — the standard tabletop set — up to 10 dice at a time, with the total shown automatically.
Can I use it for D&D and other tabletop games?
Yes — that's the main use. Initiative rolls, damage dice, advantage pairs (roll 2d20 and take the higher), ability scores (4d6 drop lowest) all work.
Does it work offline?
Yes. Once the page has loaded, rolling needs no internet connection — ideal for game nights with bad Wi-Fi.