Provably Fair · 9 Casinos

Provably Fair Verifier & Seed Analyzer

Check any Stake-Originals result against its seed pair - Mines, Plinko, Dice, Limbo, Keno and Crash, across 9 provably-fair casinos. Everything runs in your browser; your seeds never leave your device.

16 games at Stake

Pick a game to start verifying

Choose any game above to open its dedicated verifier - paste your server seed, client seed and nonce to recompute the exact result.

Provably fair verification lets anyone independently recompute a game's result from its server seed, client seed and nonce - confirming the casino could not have altered the outcome after the bet. Browse all casinos & games

Casinos you can verify

Every casino below runs the same Stake-style HMAC-SHA256 engine - one verifier covers them all. Tap any casino to open its dedicated checker.

How provably-fair verification works

Before you bet, the casino shows you a hashed server seed - a fingerprint of a secret it has already locked in. You also set a client seed, and every bet increments a nonce. The result you see is computed by feeding HMAC-SHA256(serverSeed, clientSeed:nonce:round) through the game's rules.

Because the server seed was committed in advance, the casino can't change it after seeing your bet. When you rotate seeds, the casino reveals the unhashed server seed. Paste it above with your client seed and nonce, and this tool re-derives the exact same outcome - proof the round was fair.

This is verification, not prediction. No tool can forecast a future result, because the server seed stays hidden until you rotate it. Treat any "predictor" as a scam.

Frequently asked questions

What is a provably fair seed analyzer?⌄

It's a tool that re-computes a casino game result from the same inputs the casino used - your unhashed server seed, your client seed and the bet's nonce. If our result matches what you saw in-game, the round was provably fair and was not altered after you bet.

Can this predict the next Mines or Plinko result?⌄

No. Provably-fair outcomes are generated by HMAC-SHA256 from a server seed you can't see until you rotate it. Nothing - no tool, script or 'predictor' - can know a future result before the server seed is revealed. Anyone claiming otherwise is misleading you. This verifier only confirms past results were fair.

Does it work for casinos other than Stake?⌄

Yes. Stake.us, Rainbet, Roobet, Shuffle, Gamdom, BC.Game and other Stake-engine casinos all use the identical HMAC-SHA256 algorithm, so the same verification works across every casino in the selector.

Is it safe to paste my seeds here?⌄

Yes. All hashing runs locally in your browser with the Web Crypto API. Your server seed, client seed and results are never sent to Spindex or any server.