Aviator Provably Fair Checker

Where to find the seeds in 1xBet Aviator

1. Open the round history. In 1xBet Aviator, tap a multiplier in the history bar at the top of the game.
2. Open the fairness window. The window shows the server seed, the three client seeds with player nicknames, the combined SHA-512 hash and the result.
3. Copy the values. Long-press each seed on a phone, or use the copy icons on desktop.
4. Paste into the checker. Add the server seed and the three client seeds in the order the window lists them, then tap "Check the round".
5. Compare. The hash and multiplier should match the window. You can also paste the combined hash on its own.

How Aviator provably fair works

Aviator provably fair is a commit-and-reveal scheme. The server commits to a value before you bet and reveals it after the round, so you can confirm it never changed.

The server seed cannot change after its aviator hash goes public, because any change produces a different SHA-256. The client seeds come from players, so the server cannot pick a server seed that produces a crash it wants: it does not know the client seeds in advance.

From aviator hash to multiplier

The game reads the first 13 hex characters of the combined SHA-512 hash as a 52-bit number h, then applies:

multiplier = max(1.00, floor(97 × 2⁵² ÷ (2⁵² − h)) ÷ 100)

Worked example from a public round: hash prefix f0fbffc79944c → h = 4,239,441,899,656,268 → 16.53x, the same value the game showed. Three more public rounds check out the same way: cf92858df1877 → 5.12x, 38c394b55c500 → 1.24x, f3ab4957bc5b0 → 20.13x.

Spribe documents the seeds and the SHA-512 step but has not published the hash-to-multiplier code. The formula above is an independent reconstruction that matches these rounds to the cent. Spribe's own demo string "ABCDEFGH" gives 2.12x in this formula against 2.17x in Spribe's illustration, so treat the fairness window as the reference.

Why provably fair blocks every aviator predictor

Predictor sellers like to say "Aviator is provably fair, so it can be predicted". The checker shows the opposite. Before take-off you hold the SHA-256 of the server seed. Getting the seed back from that hash would take more computing power than exists. Without the seed you cannot build the SHA-512, and without the SHA-512 there is no multiplier. Verification works backwards only: after the round, never before.

The same logic rules out "server seed leaks" sold on Telegram. A leaked seed would match its published hash; the sellers never show one that does. Read more on the Aviator signals page.

The Aviator server seed, step by step

The Aviator server seed is a random string that the game server creates for each round. Before bets close, players see only its SHA-256 hash. After the plane flies away, the window reveals the seed itself. Hash the revealed seed with SHA-256 (the optional field in the checker does this) and compare it with the hash shown before the round. A match proves the seed was fixed before any bet.

Your own client seed lives in the game settings, and you can change it before a round. Changing it changes the combined hash only if you are one of the first three bettors in that round, which is one more reason the result cannot be steered by any single side.

If an Aviator provably fair check fails

• Seed order. Paste client seeds in the order the window lists them. A different order gives a different hash.
• Hidden spaces. Copying on a phone can add a space at the end. The checker trims spaces at both ends, but not inside.
• Wrong round. Check that the round ID in the window matches the multiplier you tapped.
• Model gap. If the SHA-512 matches but the multiplier differs by a few cents, the gap comes from the reconstructed formula; the matching hash already proves the round.

A mismatch in the SHA-512 itself, with correct seeds and order, is worth a screenshot and a message to 1xBet support.

1xBet Aviator: after you check a round

A matching round tells you the game is honest. It does not tell you the game is beatable: the formula keeps 3% of stakes. Plan stakes with the Aviator calculator, and if you play on 1xBet from Sri Lanka, use promo code LK26X at sign-up.

Aviator provably fair FAQ