Free d20 roller for D&D and tabletop RPGs. Roll a single 20-sided die instantly for attacks, saves, and ability checks, with full roll history.
The twenty-sided die — the d20 — is the heart of nearly every modern tabletop role-playing game. This roller defaults to a single d20, so one tap gives you a clean result from 1 to 20. There are no dice to lose under the couch and no app to install; the roll happens in your browser the moment you press the button.
In d20-based systems like Dungeons & Dragons 5th edition and Pathfinder, almost every meaningful action resolves on a d20:
A "natural 20" is a raw roll of 20 on the die before any modifiers — on an attack it is an automatic hit and, in most systems, a critical hit that doubles or maximizes damage. A "natural 1" is the opposite: a raw 1, which usually means an automatic miss and, in many tables' house rules, a fumble. Because this tool shows the unmodified die face, you always know whether you scored a natural 20 or a natural 1.
Every face from 1 to 20 has exactly a 5% chance on each roll. The die has no memory, so a string of low rolls does not make a high roll "due." If you want the advantage and disadvantage mechanic — rolling two d20s and keeping the higher or lower — use the full D&D dice roller, which adds those buttons. For a quick single die during play, this d20 roller is the fastest way to get a number you can trust.
A d20 (twenty-sided die) is the core die in tabletop RPGs like Dungeons & Dragons and Pathfinder. You roll it for attack rolls, saving throws, and ability or skill checks, then add the relevant modifier and compare the total to a target number.
A natural 20 is rolling a 20 on the raw die before adding any modifiers. On an attack roll it is an automatic hit and usually a critical hit. This tool displays the unmodified die result, so you can always tell when you roll a natural 20.
A natural 1 is rolling a 1 on the raw die. On an attack it is an automatic miss regardless of your bonuses, and many tables treat it as a fumble. Because the roller shows the unmodified face, a natural 1 is easy to spot.
Each of the twenty faces has an equal 5% (1 in 20) chance on every roll. The die has no memory, so previous results do not change the odds of the next roll.
Advantage means rolling two d20s and keeping the higher result; disadvantage means keeping the lower. This single-die roller covers straight d20 rolls; use the D&D dice roller for built-in advantage and disadvantage buttons.