Roll a virtual D20 die online instantly. Perfect for DND checks, tabletop game sessions, and probability calculations. 100% fair random outcomes.
The D20 is the icon of modern tabletop gaming. Nearly every meaningful action in Dungeons & Dragons — attack rolls, saving throws, ability and skill checks — starts with a D20, where a natural 20 is a critical success and a natural 1 is a critical miss. This page preloads a single D20 so you can roll a fair, unbiased value between 1 and 20 instantly — no signup, no app, straight in your browser.
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Make D&D attack rolls, saving throws, and ability checks, watching for the natural 20 (crit) and natural 1 (fumble).
Demonstrate discrete uniform distribution models where each of the 20 faces has exactly an identical likelihood of landing.
Map choices or chores to values 1 through 20 and roll the die to choose a winner fairly.
Replace lost physical dice in board games with our fast, browser-based simulator on mobile or tablet.
A D20 die operates on a discrete uniform probability distribution. Each face (from 1 to 20) represents an equal 1/20 (~5.00%) chance of selection. Our generator employs browser crypto functions to ensure outcomes are completely uniform and random.
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