Provably Fair CheckerSHA-256 (per game)

Roobet Provably Fair Verifier

Roobet's provably-fair system has its own quirks: a different message format from Stake, per-game hashing rules, and a Coin Flip that swaps the key and message. This verifier mirrors Roobet's actual implementation so Dice, Mines, Plinko, Keno, Dragon Tower and Coin Flip all reproduce correctly.

9 games at Roobet

Crash

Seed pair

Client seed

Server seed (unhashed)

Nonce

Runs entirely in your browser - your seeds never leave this device.

Roll Result

00.00

0255075100

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

Roobet game verifiers

In-depth provably-fair checkers and payout math for Roobet's most-played games.

Roobet Crash

How Roobet provably fair works

Roobet derives results from the message clientSeed - nonce (with spaces around the dash), not the colon-separated format Stake uses. That single difference breaks generic verifiers, which is why Roobet rounds need this dedicated tool.

The games differ in how they read the hash. Dice scans the hash in five-hex-character windows, rejecting any value at or above 1,000,000 to stay uniform, then scales the survivor into 0.00-99.99. Mines and Keno build a SHA-256 chain seeded with a shuffle nonce, turn it into Stake-style floats, and run a Fisher-Yates shuffle. Coin Flip flips the construction, using the client seed as the key and the server seed in the message.

Every result is bound to a server seed Roobet commits to before the bet. Rotate seeds to reveal it and confirm any past round above.

Roobet's provably-fair games

Roobet's per-user provably-fair games - Dice, Mines, Plinko, Keno, Dragon Tower and Coin Flip - are all reproducible here. Roobet also runs shared-seed games like Crash and Roulette, which use a rotating public seed rather than your personal seed pair and so sit outside this per-bet verifier.

How to verify a Roobet result

1Open Fairness or Provably Fair in your Roobet account.
2Rotate your seed pair to reveal the previous server seed unhashed.
3Copy the server seed, your client seed and the nonce.
4Paste them above and choose the Roobet game to match the result.

Roobet provably fair FAQ

Why won't a normal Stake verifier work on Roobet?⌄

Roobet uses the message clientSeed - nonce with spaces around the dash instead of clientSeed:nonce:round, and applies per-game rules on top. The format mismatch alone produces a different hash, so you need a Roobet-specific tool like this one.

Is Roobet provably fair?⌄

Yes for its per-user games. Each Dice, Mines, Plinko, Keno, Dragon Tower or Coin Flip result is fixed by a committed server seed and reproducible here once you reveal it.

Can I verify Roobet Crash or Roulette here?⌄

No. Those run on a shared, rotating public seed rather than your personal server/client/nonce, so they fall outside a per-bet verifier. The per-user games above are fully checkable.

How does Roobet Dice work?⌄

Roobet reads its game hash in five-hex-character chunks, discards any chunk of 1,000,000 or more to avoid bias, and maps the first valid value into the 0.00-99.99 range. The verifier reproduces that exact roll.