io
Blob Arena
Start as a tiny blob in a big arena: eat pellets, swallow smaller rivals, split to lunge at prey and dodge anything bigger than you.
- Keyboard
- Touch
Dice Roller
Roll up to 12 fair dice at once, from d4 to d100, with the total worked out for you.
Dice
Choose your dice and press Roll.
Share this tool:Post on X (opens in a new tab)
About the dice roller
Lost the dice for a board game, or need a d20 for a tabletop session? This dice roller rolls up to 12 dice at once, choosing from d4, d6, d8, d10, d12, d20, d100. It adds up the total and keeps your last few rolls so nobody has to remember them.
How to use it
- Choose how many dice to roll with the minus and plus buttons.
- Pick the number of sides: d6 is an ordinary die, d20 the classic tabletop die.
- Press Roll. Each die is shown on its own, with the total underneath.
- Earlier rolls stay listed below, newest first, until you leave the page.
Questions
Are the rolls really random?
Yes. Each die uses your browser’s cryptographic random number generator, with a method that keeps every face exactly as likely as the others.
What does 2d6 mean?
It is shorthand for rolling two six-sided dice. The number before the d is how many dice, and the number after it is how many sides each one has.
Can I use it on my phone?
Yes. It works in any modern browser on phones, tablets and computers, with nothing to install.
Take a break: play a free game
Card
Solitaire
Classic Klondike Solitaire. Build four suits from ace to king, with Draw 1 or Draw 3, unlimited passes, undo and hints.
- Keyboard
- Touch
Strategy
Mexican Train
The classic dominoes game against three computer rivals: build your train from the hub, use the Mexican train, and empty your hand first.
- Keyboard
- Touch
More free tools
Coin Flip
A fair heads or tails in one tap, with a running count of every flip and your current streak.
Random Number Generator
Pick one number or up to 1,000 from any range, with or without repeats, ready to copy.
Sudoku Solver
Type or paste any 9 × 9 Sudoku and get the solution, plus a check that the puzzle has exactly one.
Score Keeper
A simple scoresheet for 8 players or fewer: enter each round and the totals and leader update for you.