Tool

Stake Dice provably fair verifier

Paste the inputs from one Stake Dice bet to recompute its SHA-256 seed hash, exact HMAC message and Dice number in your browser. This tool deliberately implements only Stake Dice with cursor/currentRound 0; it does not claim to verify Crash, slots or other casinos. Check the method against Stake's official implementation reference. New to the concept? Read our provably fair guide first.

Verifier, not predictor

This tool recomputes a completed Stake Dice round after the server seed is revealed. It cannot recover a properly generated secret seed from its SHA-256 commitment or predict a future roll.

Read what provably fair verification proves — and what it does not →

Scope: Stake Dice only. This reproduces Stake's HMAC-SHA256 Dice derivation with cursor/currentRound fixed at 0. It is not a generic verifier for Crash, slots or another casino's algorithm.

Revealed Stake server seedPre-rotation seed commitment (optional — SHA-256 hash copied from Stake before seed rotation)

Client seedNonce

A matching recomputation verifies these supplied inputs against this published algorithm. It does not prove that you copied the correct bet inputs, and it does not mean the odds favour you. 18+ · Play responsibly.