Check a hash commitment
Paste the revealed seed or result and the hash published before the round. A match shows the value was fixed before the round and not changed afterwards.
Checker
Runs in your browser with Web Crypto. What you paste is not sent to us.
What a match shows
This tool checks the commitment only: that the revealed seed or result was fixed before the round. It does not recompute the game's outcome from the seed, and it says nothing about the game's long-run return.
The check is meaningful for games marked provably fair or hash-committed on their game page. A provably fair game also publishes how a round is computed from its seeds; a hash-committed game publishes the hash but no formula from hash to result. A game with a certified RNG or a live physical draw has no commitment to check.
JetX
Crash Lab verification method — SmartSoft publishes no official description
JetX game history lists each round's Result, written as the multiplier and a round ID joined by an underscore, together with a Hash. The SHA-256 of the Result text equals the Hash.
A match shows that the Result is the value the Hash commits to. It tells you the round was fixed in advance only if you saw the Hash before the round ended.
SHA-256 to Aviator multiplier
The step that turns an Aviator round's seeds into its multiplier is not covered here yet, and we do not publish a formula for it. What this tool does for Aviator is the commitment check: paste the revealed server seed and the hash shown before the round, with the algorithm Aviator names.
Check it by hand
No JavaScript needed. On macOS or Linux, in a terminal:
printf '%s' 'PASTE-THE-SEED-HERE' | shasum -a 256