Dice Roller — Free Online Virtual Dice Roller with History & Stats

No dice in the drawer? This dice roller throws virtual dice with the same cryptographic randomness your browser uses for security — no predictable patterns, no loaded results, just honest chance. Roll a single die with the quick buttons (d4 through d100), or write any standard dice notation — 2d6 for two six-sided dice, d20 for the classic twenty-sider, 3d8+2 when a game adds a modifier — and get the total with every individual die shown, so critical successes and embarrassing ones are all on the record. The session panel keeps your last thirty rolls and running statistics: how many dice you have thrown, your average roll, your highest and lowest. It is built for board-game nights, tabletop RPGs, classroom probability lessons and settling arguments — anywhere a fair roll is needed and the physical dice have rolled under the sofa for the last time.

Dice notation, explained in ten seconds

Role-playing and board games write dice rolls as XdY±Z: roll X dice with Y sides each, then add or subtract Z. 2d6 — two ordinary dice — is the most common roll on Earth (it drives Monopoly, Catan and craps), and its results are not all equal: 7 is six times more likely than 2 or 12, because more combinations sum to it. 1d20, the Dungeons & Dragons workhorse, is the opposite: flat — every face from 1 to 20 is equally likely, which is why a natural 20 feels special at exactly 5%. This roller accepts 1–100 dice with 2–1000 sides and an optional modifier, shows each die separately, and applies the modifier once to the total, precisely as game rules mean it.

Why these rolls are genuinely random

Cheap dice apps use whatever quick random function is lying around; this one asks the browser’s cryptographic generator (the Web Crypto API) for its dice. To keep every face exactly equally likely, it uses rejection sampling: random 32-bit values that fall in the small uneven remainder at the top of the range are discarded instead of being mapped down, which removes the subtle bias that naive modulo arithmetic gives to low faces. The difference is invisible on any single roll — that is the point — but across the thousands of rolls in the session statistics, the averages settle where probability says they should (3.5 for a d6, 10.5 for a d20), and no face is quietly favoured. Your history stays in the page and disappears when you close it; nothing is recorded anywhere.

Rolling at the table: games, classes and decisions

For tabletop RPGs, the quick buttons cover the full standard polyhedral set — d4, d6, d8, d10 (and d100 for percentile rolls), d12, d20 — and notation handles the rest: weapon damage like 2d6+3, advantage experiments like 4d6 drop-lowest approximations, or a fistful of d6s for wargames. Teachers use the stats panel for probability lessons: roll a d6 a hundred times and watch the face counts flatten toward equal, the law of large numbers doing its slow magic. And for the oldest use of dice — deciding things — a single d6 settles who goes first more fairly than any argument. Whatever you roll for, the deal is the same as with physical dice: the roller does not know, does not care, and cannot be sweet-talked.

Frequently asked questions

Are the rolls really random and fair?

Yes. Values come from the Web Crypto API with rejection sampling, so every face of every die is equally likely — the same quality of randomness used for security purposes, and provably unbiased across many rolls.

What does 2d6+3 mean?

Roll two six-sided dice and add 3 to their sum. The notation is XdY±Z: number of dice, sides per die, then an optional modifier applied once to the total.

How many dice can I roll at once?

Up to 100 dice per roll, with anything from 2 to 1000 sides each. Every individual die is shown, and the history keeps your most recent 30 rolls.

Can I roll a d100 (percentile)?

Yes — the d100 button rolls 1–100 directly. Traditional percentile pairs of d10s give the same distribution; the single d100 is simply faster to read.

Embed this tool on your website — free

Copy the code below to add this working tool to your own page. A small credit link stays with it — that’s all we ask.

Dice Roller — Roll Virtual Dice Online (d6, d20 & Dice Notation)