Shuffle Provably Fair Verifier
Verify any Shuffle original from the server seed, client seed and nonce. 6 games, the operator's published HMAC-SHA256 mapping, nothing sent anywhere.
Shuffle documents the same byteGenerator (HMAC-SHA256 over clientSeed, nonce and cursor; 32 bytes as 8 four-byte floats) and the same event mapping for the games listed here (article revision 2026-08-12). Its code blocks are images, so the prose is what was checked. Not listed: Crash and Slide (hash-chain seeded), Limbo and Tower (formula and difficulty table not in the prose), Coinflip and Hilo (side and card index order not in the prose).
Shuffle games you can verify here
Shuffle documents the same byteGenerator (HMAC-SHA256 over clientSeed, nonce and cursor; 32 bytes as 8 four-byte floats) and the same event mapping for the games listed here (article revision 2026-08-12). Its code blocks are images, so the prose is what was checked. Not listed: Crash and Slide (hash-chain seeded), Limbo and Tower (formula and difficulty table not in the prose), Coinflip and Hilo (side and card index order not in the prose).
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Frequently Asked Questions
Where do I find my Shuffle seeds?
In the bet details for any bet in your history. The client seed and nonce are visible at once; the unhashed server seed is revealed when you rotate your seed pair on Shuffle's fairness page.
Which Shuffle games can be verified from a seed pair?
Dice, Mines, Plinko, Keno, Roulette, Wheel. Games the operator seeds from a public hash chain, or whose event mapping it has not published, are not listed.
What does a match prove?
That the result you were shown is the one the committed server seed, your client seed and the nonce produce under the published mapping. It does not change the house edge and it cannot predict a future bet.