Two dice
Rolling two fair six-sided dice gives 36 equally likely ordered combinations. Sums in the middle, such as 7, have more combinations than sums near 2 or 12.
Virtual dice — Guide
Guidance for Virtual Dice Roller. Practical instructions, limitations, and accuracy tips.
This article explains the use and limitations of the interactive tool. No signup is required. Output can be approximate and should not substitute for authoritative sources when the stakes are high.
Random generation
The site uses the browser cryptographic random API to select the dice faces without requiring an account.
Games
For board games, agree beforehand whether doubles have special rules and which turn sequence your group follows.