What an online dice roller is for

Dice are the most flexible random-number generator humans have ever made. With a single D20 you can resolve a D&D attack, generate a random number 1-20, pick a random student from a class of 20, or settle a tiebreaker. With four D6 you can roll a D&D ability score. With one D100 you can resolve percentages. A virtual dice roller gives you the whole bag — D4, D6, D8, D10, D12, D20, and any custom-sided die from 2 to 1000 — without the physical dice.

Why use this over physical dice

• Animated 3D-style cubes with a tumbling bounce, so the result still feels rolled, not chosen
• Sound — a square-wave rattle during the tumble, with a rising arpeggio when any die crits (rolls its natural max)
• Crit-sparkle animation — when any die rolls its maximum (nat 20 on a D20, 6 on a D6, etc.), it scales up with a golden glow. It's the most satisfying part of the tool.
• Multiple dice at once — roll 5d6 for Yahtzee, 4d6 for D&D ability scores, 10d10 for a stat-test simulation
• Modifier — add a +/- between -20 and +20 to the sum (e.g. 1d20+5 for an attack roll with a +5 bonus)
• Custom sides — anything 2 to 1000. D7? Sure. D100 for percentile rolls? Of course.
• Roll history — last 50 rolls preserved so you can refer back if a result is disputed
• Themes — 5 free dice themes plus Holographic and Marble for Pro members

D&D / TTRPG-friendly

This page has been tested by D&D and Pathfinder players. The defaults match what tabletop RPG-ers expect:

• D20 is the marquee die — natural 20 triggers the crit animation + arpeggio sound
• Common rolls like 4d6 (ability score), 2d6 (damage), 1d20+5 (skill check) take 2-3 clicks
• Bookmarkable shortcuts: /tools/dice-roller/dnd-d20, /tools/dice-roller/dnd-stats, /tools/dice-roller/percentile
• Save & share lets you publish a 'kit' (e.g. "2d8+3 fireball damage") that you can paste into Discord during a session

A note on RNG fairness

This tool uses Math.random() per die, called fresh each roll, which produces a uniformly distributed integer in [1, sides]. There is no carry-over state, no bias toward recent rolls, no streak-correction. If you roll five D20s in a row and get five 20s, that's pure luck (about 1 in 3.2 million) — not a bug.