Roll Dice (card game)

Roll Dice is a compact version of my rolldice.games site, redesigned to fit inside a social media card. It starts with two six-sided dice. Tap the tray (or press Space) and the dice are thrown, tumble, bounce, and settle.

What you can do

• Roll: tap the felt, press Space or Enter, or press the Roll button.
• Change the dice: add or remove dice, up to six, and pick d6, d8, d10, d12, or d20. The game remembers your choice.
• Hold: tap a die after a roll to hold it. Held dice stay put on the next roll.
• Share: the share link carries your roll, so a friend sees your dice on the table and rolls to beat them.

How the rolls work

Every result comes from the browser's cryptographic random number generator, not Math.random. Draws that would favor the lower faces are thrown away and drawn again, so every face has exactly the same chance. The result is decided before the throw starts, and the animation is built to land on it. If the browser has no cryptographic generator, the game stops with an error instead of falling back to a weaker one.

Each die is drawn as a real 3D shape by a small graphics program on your device, so it tumbles with true lighting and rounded edges instead of using pre-made pictures.