Random Dice Roller (D4)
Generated using cryptographically secure randomness.
About the D4
The four-sided die (D4) is shaped like a triangular pyramid and is a standard die in tabletop role-playing games. It produces numbers from 1 to 4 with equal probability and is commonly used for small damage rolls, healing effects, and simple random choices.
This digital version uses secure randomness to produce cryptographically secure random numbers, ensuring a uniform distribution with no physical bias.
Probability
P(x) = 1/4 = 25%
The expected value of a single D4 roll is 2.5. Each of the four faces has an exactly equal 25% probability of landing face up.
Use cases
- D&D weapon damage for daggers, clubs, and improvised hits
- Small healing or damage effects in tabletop RPGs
- Quick selection from up to 4 options
- Simple probability exercises with four outcomes
How it works
- Your browser generates a cryptographically secure 32-bit unsigned integer
- The integer is mapped to the range 1-4 using modular arithmetic
- The result is displayed instantly with 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, with no generator API calls, server-side generation, or storage of generated values.