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Dice Roller

Roll D4-D100 dice online with totals and history.

Roll 1–10 dice at once

Number of faces per die

Roll 1–20 times in a row

How to use

  1. Set the dice count (1–10), the die type (D4–D100) and how many times to roll (1–20).
  2. Press "Roll" — the numbers come from the browser's cryptographic random source (crypto.getRandomValues), so every face is equally likely.
  3. The result area shows the latest roll's total, the sequence of each die and each roll's sum; with multiple rolls you also get the grand total.
  4. The history keeps the last 10 rolls with time, die type and dice sequence; "Clear history" removes them in one click.
  5. Use it for board games, tabletop RPGs, classroom sampling or everyday decisions — everything runs locally.

FAQ

Are the dice results really random?
Yes. Each value is derived from a 32-bit integer produced by window.crypto.getRandomValues, with rejection sampling used to remove modulo bias — the browser's cryptographic random source, stronger than Math.random.
How many dice can I roll at once?
Up to 10 dice per roll and up to 20 rolls in a row — for example "10D6 × 20" produces 200 values in one click, grouped and summed automatically.
How does D100 work?
D100 generates one integer from 1 to 100 directly, equivalent to combining a percentile die with a tens die in tabletop RPGs — no manual pairing needed.
Is the history uploaded anywhere?
No. The history lives only in the current page's memory and disappears when you refresh or close the tab; nothing is sent to a server or written to local storage.

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