How this works in your browser
Every roll draws from the browser’s cryptographically secure random number generator rather than an ordinary pseudo-random function, which removes any question of predictable sequences across a long session. Values are mapped uniformly onto the faces of the chosen die, so each face is genuinely equally likely, and multiple dice are rolled independently before being summed. That independence is what produces the familiar clustering of totals toward the middle when several dice are used, a property of the mathematics rather than of the implementation. Nothing is transmitted or recorded, so each roll is entirely self-contained.
Who uses Dice Roller and Coin Flip
Tabletop roleplaying
Roll the full range of polyhedral dice when yours are not to hand.
Board games with lost pieces
Replace a missing die without stopping the game.
Classroom probability
Demonstrate distributions by rolling many dice quickly.
Quick fair decisions
Flip a coin when a straight fifty-fifty call is all you need.
Frequently asked questions
What dice types are supported?
D4, D6, D8, D10, D12, and D20 - the standard set used in most tabletop games.
Can I roll multiple dice at once?
Yes, choose how many dice (up to 20) to roll simultaneously.
Is the coin flip fair?
Yes, it uses a cryptographically secure random source, giving each outcome an equal 50/50 chance.
Is a virtual die actually as fair as a real one?
Fairer, in practice. Physical dice have manufacturing tolerances, and cheap ones are measurably biased by hollowed pips and uneven density. A secure random source has no such asymmetry, which is why online tabletop play generally accepts digital rolls without argument.
Why do multiple dice behave differently from one?
Because totals cluster. A single die is flat, with every face equally likely, but two dice have many more ways to make seven than to make two, so the total tends toward the middle. That is why game designers use multiple dice when they want reliable averages and a single die when they want swing.
Does a run of the same number mean it is broken?
No. Genuine randomness produces streaks far more often than intuition expects, and a run of four sixes in a session is unremarkable. A source that never produced streaks would be the suspicious one.
Do I need a tabletop app for this?
Not for standard rolls. This covers the usual die types and multiple dice at once, which handles most of what a game needs. Dedicated apps add modifiers, saved rolls and character sheets, none of which help when you have simply lost a die.