What the online dice roller can roll, how modifiers and notation work, and how to use it at the table, in class and for quick decisions.
01Dice you can roll
Six-sided dice are the default. Open Settings to switch to a D4, D8, D10, D12 or D20, and to roll up to 8 dice at once. The dice on screen are drawn as the real shapes, so a D20 looks like a D20, and the highest face lights up when it lands.
Rolls use the browser’s cryptographic random number generator, the same source used for secure keys. Each die is independent, every face is equally likely, and the tumbling animation plays after the result is already fixed.
- Dice type
- D4, D6, D8, D10, D12 or D20.
- Dice
- One to eight dice, all the same type, rolled together.
- Modifier
- A number added to (or taken from) the total, as in 1d20+5.
- ROLL / Space / Enter
- Any of the three rolls again; the keyboard works with the page in focus.
02Reading the result
Each die shows its own face, the panel shows the sum, and the modifier is applied to give the total. The notation line, for example 2d6+3, is written the way rule books write it so you can check you set it up right. The last twelve rolls stay in the Recent list with their values and totals, which settles “what did I roll last turn?” without a notebook.
03For tabletop games
Set a D20 with your attack bonus as the modifier and leave it there for the session; the page remembers dice type, count and modifier between visits. Damage rolls like 2d6+3 take a second to set up and the sum is done for you.
For advantage or disadvantage, roll two D20s and read the higher or lower. For ability scores, roll four D6 and drop the lowest by eye. The roller is deliberately simple: it does not parse full dice expressions or mix dice types in one roll, because the people who need that have a dedicated app, and everyone else just wants dice that work on a phone.
04Board games, classrooms and decisions
Lost the dice from a board game? Two D6 on a phone passed around the table is the fastest fix, and the Recent list stops disputes about doubles. Teachers use a single D6 for probability lessons and a D20 for random numbers up to twenty; for any other range, the random number generator is the better tool.
As a decision maker, one D6 settles anything with up to six options: number the choices and roll. For a straight yes or no, flip a coin or spin the yes or no wheel.
05Offline, saved, no app
Once the page has loaded it works with no connection, which matters at a gaming table in a basement. Your settings are stored in the browser on your device. Nothing is sent anywhere, and there is nothing to install or sign up for.
06Dice roller vs. random number generator
A dice roller gives you discrete faces with a visible roll, the right feel for games. A random number generator gives you any range, with no repeats if you want them, the right tool for picking ticket numbers or a number between 1 and 1000. Both live here; use whichever matches the job.