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DiceStrats / Verify / Blackjack
Seed checker · Provably fair · Stake & Shuffle

Stake Blackjack Verifier

Reveal the full card order Stake dealt from the seed pair — player, dealer up-card, hole card, then every hit.

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About Blackjack on Stake

How Blackjack works. How to verify it.

Decksunlimited
Cards per float1
Draw orderP P D D
52 floats; card = CARDS[min(51, floor(float × 52))] from an unlimited deck ordered ♦2 ♥2 ♠2 ♣2 … ♣A.Deal order: player 1, player 2, dealer up, dealer hole, then draws.

Compare the sequence with the hand you were dealt. The dealer's hole card was fixed before your first decision.

The byte stream behind every Original

Stake derives outcomes from HMAC-SHA256(key = server seed, message = clientSeed:nonce:round). Each round yields 32 bytes; a float is four bytes read as b₀/256 + b₁/256² + b₂/256³ + b₃/256⁴. Blackjack reads as many floats as it needs, in order. The server seed is committed by hash before you set a client seed, so neither side can steer a result — read more on how seeds work.

Frequently asked

How is a Stake Blackjack result generated?

52 floats; card = CARDS[min(51, floor(float × 52))] from an unlimited deck ordered ♦2 ♥2 ♠2 ♣2 … ♣A. Deal order: player 1, player 2, dealer up, dealer hole, then draws.

What do I enter to verify a Blackjack bet?

The revealed server seed, your client seed, the bet's nonce, and the options you played with. Compare the sequence with the hand you were dealt. The dealer's hole card was fixed before your first decision.

Where do I find the server seed, client seed and nonce?

On Stake: Fairness (the shield icon) → Seeds. The active server seed is only shown as a hash; rotate the pair and the previous server seed is revealed in plain text. The client seed is yours (Stake generates one or you type it). The nonce is the bet number within that seed pair — every bet's detail popup shows it.

Does anything I paste leave my browser?

No. The HMAC-SHA256 is computed by your browser's WebCrypto API; this page makes no network requests with your seeds and has no analytics on the inputs.

Can this predict the next roll?

No — and nothing can. The next roll needs the unhashed server seed, which Stake only reveals after you rotate away from it. Anyone selling a predictor for Stake is running a scam. What you can do is verify every past roll, which is what this tool is for.

What if the result doesn't match Stake?

Check the three inputs first: the revealed (unhashed) server seed, the exact client seed active at the time, and the right nonce. If they are right and it still doesn't match, you have a reproducible discrepancy — keep the bet ID and seeds and raise it with Stake support.

Other games

DiceVerify a dice roll (0.00–100.00) from the HMAC-SHA256 byte stream and see the exact 99 ÷ chance payout.LimboConfirm a Limbo multiplier from the first four HMAC bytes and check your target's 99 ÷ target chance.CrashWalk Stake's per-round hash chain to verify any crash point — no nonce, one hash per round.MinesVerify mine placements on the 5×5 grid via the Fisher-Yates draw and get the exact payout for your safe reveals.PlinkoVerify every pin direction and the final bucket for any row count and risk level.KenoVerify the 10 drawn numbers from a 40-ball pool and your hit count's payout per risk table.HiloVerify the card sequence and the per-round higher/lower multipliers of a Hilo run.FlipVerify the coin sequence and the 2ⁿ × 0.98 payout for a streak of heads or tails.
Same rolls, smarter bets.

The DiceStrats extension runs creator strategies on your own Stake account, with take-profit and stop-loss armed by default and a ⚙ Seeds panel that rotates to a client seed you choose. Free with promo code DICESTRATS.

Open the marketplaceStake with code DICESTRATS