Dice Roller
The D20 is the icosahedron: the single most rolled die in Dungeons & Dragons and countless adventure tabletop games. Attack rolls, saving throws, skill checks, and the iconic critical hit (20) or critical fail (1) all use this die. Every number from 1 to 20 has a 5% chance.
Roll dice from D4 through D100.
Press Roll to throw the dice
Common uses for the D20
Try another die
How to Use
This page is pre-set to roll a D20. Tap the Roll button to drop one die; use the count toggle to roll up to 10 at once. Results are generated via the Web Crypto API, so every face has an exactly equal chance.
For the full dice roller with dice-type selector (D4 through D100), visit the main Dice Roller. For non-standard ranges, use the Random Number Generator.
The D6 uses an animated 3D cube; larger dice use flat-die clip-paths with a clean drop animation. All animations respect prefers-reduced-motion.
About This Tool
The dice roller supports common dice shapes and multiple dice rolls for games, classroom probability lessons, and quick random outcomes. It is useful when a result should feel familiar to tabletop players or students.
Unlike a simple number generator, dice notation carries context. Rolling a d20, d6, or d100 communicates the range and expected use immediately.
Random tools are most helpful when the rules are clear before the result is generated. Decide what the input means, whether duplicates are allowed, and whether the first result should be final. Clear rules make the result easier to trust and explain.
For casual choices, games, classroom activities, examples, and creative prompts, a browser-based tool is usually enough. For regulated contests, high-value selections, safety decisions, legal records, or professional advice, use a process designed for that responsibility.
Last reviewed: April 20, 2026
Frequently Asked Questions
Yes. Every face from 1 to 20 has an equal chance. Randomness comes from crypto.getRandomValues (Web Crypto API), and modulo bias is handled via rejection sampling on uint64 values.
Yes. The count toggle lets you roll up to 10 D20s. A running total is shown below the dice.
Yes, casual tabletop play is a primary use case. The rolls are cryptographically random, so they are at least as fair as physical dice. For tournament play or high-stakes games, check with your group whether virtual rolls are accepted.
The D6 is animated as a true 3D cube that tumbles and lands on its final face: a small touch that matches the feel of a physical roll. D4, D8, D10, D12, D20, and D100 use flat-die silhouettes because their real shapes are harder to animate cleanly in a browser.
For casual games and classroom use, yes. For regulated contests or competitions that require a physical die, it cannot substitute: but for virtual game nights, remote D&D, and classroom probability lessons, it works perfectly.
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