Random Dice Roll Generator (D10)
About the D10
The ten-sided die (D10) is shaped as a pentagonal trapezohedron. It produces numbers from 1 to 10 with equal probability. In tabletop RPGs, the D10 is used for damage rolls (heavy crossbow, eldritch blast), and two D10s together form the percentile dice (D100) system used for many skill checks and random tables.
This digital version uses the Web Crypto API to produce cryptographically secure random numbers, ensuring a perfectly uniform distribution with no physical bias.
Probability
The expected value of a single D10 roll is 5.5. Each of the ten faces has an exactly equal 10% probability of landing face up.
Use cases
- D&D damage rolls — heavy crossbow, eldritch blast, firebolt
- Percentile rolls — pair two D10s to generate 1–100
- World of Darkness / Storyteller system dice pools
- Warhammer and other miniature wargames
- Random percentage generation (each face = 10%)
How it works
- Your browser generates a cryptographically secure 32-bit unsigned integer
- The integer is mapped to the range 1–10 using modular arithmetic
- The result is displayed instantly — no server request needed
- Roll history and stats are tracked locally in your browser session
Privacy and security
Your dice rolls never leave your device. This tool runs entirely in your browser using client-side JavaScript — no API calls, no server logs, no cookies, and no tracking of generated values.