Shuffle Roulette Verifier

Recompute the pocket for one spin on Shuffle from the server seed, client seed and nonce. Same HMAC-SHA256 stream the operator publishes, run in your browser.

Verify one betAnalyze a range

Casino

Game

Have a bet link? paste it; we open the right casino and game and tell you where the seeds are. Nothing is sent anywhere.

Examples

Verification Inputs

Server Seed unhashed, revealed after you rotate

Client Seed your chosen seed

Nonce bet counter, starts at 0

Server Seed Hash optional, the SHA-256 shown before you bet

Recomputes as you type. Nothing leaves your browser.

Roulette Result

Paste the server seed and client seed from the bet. The roulette result appears here as you type.

Algorithm sourceShuffle Help Center, Provably Fair: Implementation + Game Eventschecked 2026-09-20

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 fairness page Shuffle on GAMB·8

How Shuffle derives a Roulette result

From float to result

European single-zero wheel with 37 pockets. The pocket is floor(float × 37), giving 0 to 36 with equal probability.

What to compare

Compare the pocket number with the spin in your bet history. Colour follows the standard European layout.

Where the seeds are

Open the bet in your history on Shuffle. The client seed and nonce show immediately. The unhashed server seed appears only after you rotate your seed pair, so rotate first, then verify every bet from the old pair.

The byte stream, Shuffle

bytes = HMAC_SHA256(key = serverSeed, msg = clientSeed:nonce:round) // round starts at 0float = b0/256 + b1/256^2 + b2/256^3 + b3/256^4 // 4 bytes per floatresult = game event mapping applied to the floats, in order

Other Shuffle games

Shuffle Dice verifier Shuffle Mines verifier Shuffle Plinko verifier Shuffle Keno verifier Shuffle Wheel verifier Stake Roulette verifier Stake.us verifier Winna Roulette verifier

Keep what you worked out.

A free account saves your bankroll plans, sessions and the results you run here, on every device. No card, no upsell.

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Frequently Asked Questions

Is the colour part of the provably fair result?

No. The published event is the pocket number. The colour is the standard wheel layout applied to that number.

Does my bet type change the pocket?

No. Straight, split, red or black only decide whether that pocket paid.

Which Shuffle algorithm does this use?

Shuffle Help Center, Provably Fair: Implementation + Game Events, read 2026-09-20. The byte stream is HMAC-SHA256 of clientSeed:nonce:round keyed by the server seed, converted to 4-byte floats, then mapped to the pocket.

Do my seeds leave the browser?

No. The HMAC and SHA-256 run with the Web Crypto API on your device. The share link carries the seeds only because you copied it.