Dice · Coin · Random Number
Pick a mode and press the big button. Results appear instantly, with a history of your last rolls.
About this generator
One tool for the three classic randomizers. Dice mode rolls up to six dice with 4, 6, 8, 10, 12 or 20 sides — covering board games and tabletop RPGs — and shows the total. Coin mode flips up to ten coins at once and tallies heads vs tails. Number mode draws from any range you set, with an optional no-duplicates draw that works like lottery balls: perfect for picking raffle winners or random line-ups. Results come from your browser's random number generator, each outcome equally likely, and nothing leaves your device.
Three randomisers, one page
Dice mode rolls up to six dice with 4, 6, 8, 10, 12 or 20 sides and shows the total, which covers ordinary board games and tabletop role-playing in the same place. Coin mode flips up to ten coins at once and tallies heads against tails. Number mode draws from any range you set, with an optional no-duplicates draw that behaves like lottery balls rather than repeated independent picks.
The history of recent results is there for a reason. Randomness produces streaks that look wrong — five heads in a row happens roughly once in every thirty-two flips — and being able to see the actual sequence usually settles the argument faster than explaining the probability.
Reading dice totals properly
A single die is flat — every face equally likely — but the moment you add dice together the totals stop being equal. With two six-sided dice there is one way to make 2 and six ways to make 7, so 7 comes up six times as often. This is why board games that use two dice feel so different from ones that use one, and why the middle of the range is where the game actually lives.
If you need every outcome equally likely — picking a random person, a random day, a random item — use number mode rather than adding dice. Number mode draws uniformly across the range you set, which is a different thing from summing several dice into the same span.
Common uses
- Replacing dice you cannot find, which is most of what a physical board game box eventually loses.
- Tabletop role-playing, where the 20-sided die does most of the work and the others handle damage.
- Drawing raffle numbers without repeats, using number mode with duplicates turned off.
- Settling a decision between two options with a coin, which is faster than discussing it further.
- Demonstrating probability in a classroom, where flipping ten coins at once makes the distribution visible in seconds.
Frequently asked questions
Are the rolls truly random?
They use your browser's built-in random number generator, which is statistically uniform — every face and every number in the range is equally likely. It's more than fair for games, draws and decisions (though not meant for cryptography).
How do I draw lottery-style numbers?
Switch to Numbers mode, set the range (e.g. 1–45), the count (e.g. 6), and keep “No duplicates” ticked — each number can then appear only once, exactly like balls drawn from a machine. Results are sorted for easy reading.
Which dice does it support?
d4, d6, d8, d10, d12 and d20 — the standard tabletop RPG set — up to six dice at once, with the total added up for you. The classic d6 even shows its pip face (⚄).
Are computer-generated random numbers truly random?
Most software, including this tool, uses a pseudorandom number generator (PRNG) — an algorithm whose output is statistically indistinguishable from true randomness. Genuine hardware randomness instead comes from physical processes such as electronic noise. For dice, draws and everyday decisions, a good PRNG behaves exactly like real chance; the difference only matters in cryptography.
The same number came up twice in a row — is that a bug?
No — every roll is independent, so repeats are expected. With a d6, the chance of matching the previous roll is 1 in 6, which happens often. Feeling that a different number is "due" after a streak is the well-known gambler's fallacy; genuine randomness naturally produces streaks and clusters.
Is a virtual coin flip as fair as flipping a real coin?
It can even be fairer. A physical flip is slightly influenced by the starting side, the flipping technique and how the coin is caught, while a virtual flip is a clean 50/50 draw every time. Coin mode here flips up to ten coins at once and tallies heads versus tails for you.