Dice Roller

What it does

Roll dice online — standard tabletop dice (d4, d6, d8, d10, d12, d20, d100) or any custom die from 2 up to 1,000 sides. Roll up to 100 dice at once, add a modifier, and repeat the roll up to 10,000 times; the output shows every individual die as well as each roll’s total. A seed makes any roll reproducible.

Common use cases

• Tabletop RPGs and board games — d20 attack rolls, 2d6 moves, percentile (d100) tables, and 4d6 ability-score rolls, all covered by one-click presets.
• Probability demonstrations — roll 2d6 ten thousand times and watch the familiar triangular distribution of totals emerge.
• Game design and balancing — simulate thousands of rolls of a proposed dice mechanic before writing any code.
• Repeatable simulations — seeded rolls make dice-based test fixtures deterministic.

Settings

• Sides — 2 to 1,000. The classics (d4–d100) are just side counts: pick 20 for a d20.
• Dice per roll — roll 1 to 100 dice together; each die is listed individually and summed into the roll total.
• Modifier — a flat bonus or penalty (−1000 to +1000) added to each roll’s total, as in 2d6+3.
• Number of rolls — repeat the same roll up to 10,000 times in one run.
• Seed — reuse the same seed and settings to reproduce an identical sequence of rolls.

Privacy note

All rolls happen locally in your browser — nothing is uploaded or logged. Results are simulated dice, generated with seeded pseudorandomness.

FAQ

Are online dice rolls fair? Each die face has equal probability, so the simulation is statistically fair. Small samples still swing — roll enough dice and the distribution levels out.

How do I roll 2d6+3? Set sides to 6, dice per roll to 2, and modifier to +3. The output shows both dice and the modified total for every roll.

Can I reproduce a roll? Yes — that’s what the seed is for. The same seed, sides, dice count, and modifier always produce the same rolls, which is useful for demos, lessons, and tests.

Can I use this where the roll must be unpredictable? No. Seeded rolls are deterministic pseudorandomness — perfect for games among friends and for teaching, but not a certified or cryptographic randomness source for anything high-stakes.