Don't just trust casinos—verify them. Use cryptographic hashing to prove every bet is fair and unmanipulated.
Enter your bet details below to verify the result was provably fair.
The revealed server seed from the casino
Your personal seed (you can change this anytime)
Bet number in current seed pair (starts at 0)
Usually 0 (for games needing >8 outcomes)
Before revealing the server seed, casinos provide a SHA-256 hash. This proves they can't change the seed after you bet.
The server seed after it's been revealed by the casino
The hash you received BEFORE placing your bet
The hash proves the casino committed to their server seed BEFORE you played. If the hash doesn't match, it means the casino changed their seed after seeing your bet—that's cheating. Always verify the hash matches before trusting the result.
Traditional online gambling requires complete trust in the operator. You have no way to verify if the results are truly random or manipulated. Provably fair gambling solves this using cryptography—you can mathematically prove every result is fair.
This cryptographic formula combines the casino's server seed with your client seed to generate a provably random result. Neither you nor the casino can manipulate the outcome alone.
Generated by the casino. You get a hashed version before betting, which proves the casino can't change it later.
Your personal seed. This ensures YOU have influence over the randomness. Change it anytime to create new outcomes.
A counter that increments each bet. Creates unique results without changing seeds every time.
Used for games needing more than 8 random numbers (like Blackjack with many cards).
Casino provides hashed server seed before you bet
You set your client seed (or use auto-generated)
You place your bet
Game result is calculated using the formula
Casino reveals unhashed server seed after you rotate
You verify the hash matches
You recalculate the result here to confirm fairness
Don't want to trust our tool either? Smart! Use these independent verifiers: