Yes. The draw uses rejection sampling over a cryptographic source, so no face is favoured — which is more than can be said for most physical dice.

Random Answers

D20 roller

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Dice

Seed (optional)

Local · five percent per face

Recent rolls

Rolls appear here

A twenty-sided die: each face has a one in twenty chance, five percent each. Type standard dice notation for anything else — 2d6+3, 1d100, 4d8.

How to roll a d20

1 Press Roll for a straight d20.

2 Add a modifier with notation such as 1d20+5.

3 Use the quick buttons for other dice, or type any combination you need.

The two numbers that carry the drama are 1 and 20, each with a five percent chance, and it is worth knowing that a natural 20 is not automatically a success outside attack rolls in most rules — that is a common table convention rather than what the rulebook says. On advantage and disadvantage: rolling twice and taking the higher is worth roughly a five-point bonus in the middle of the range and much less at the extremes, because the improvement depends on how likely you were to succeed already.

Questions

What are the odds of a natural 20? −

One in twenty, five percent, on every roll. Previous rolls have no effect.

How do I roll with a modifier? +

How do I roll with advantage? +

Is it fair? +

Can I roll other dice? +

Sources

MDN — Crypto.getRandomValues()

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