Decent Dice (Entropy Lab)

2D Rigid-body Dice with Material Physics

Physically-based 2D square die with restitution, friction, adhesion, temperature, humidity and altitude. Timer-based noisy random, Dice/Hex label modes, and full exact-session import/export are supported.

Everything runs entirely inside your browser — no data is ever uploaded to a server.

Disclaimer

This tool is designed as a rich, physically-influenced entropy source. It combines timing, material parameters, and strong internal randomness to generate unpredictable values. For critical cryptographic purposes (such as generating private keys), the outputs of this simulator should be treated only as raw entropy. Users should move these outputs into stronger, well-reviewed systems and apply proper key derivation methods. Use for high-stakes cryptography is entirely at the user’s own risk.

Simulator

Show animation

Timer (ms)

Generate stream

Sequence amount

Sequence batch size

Update every (batches)

Random mode

Noise mode

Seed / Timer factor

Simulation time (s)

Dice material

Surface material

Temperature (°C)

Humidity (%)

Altitude (km)

Drop height (m)

Initial spin (rad/s)

Initial top face (0-3)

Label mode

Acknowledgments

Special thanks to Grok for its invaluable assistance in creating this Physically-based dice drop simulator for the Deep Inside workshop series.