Free tools for Gamba players

Verify your provably fair bets, check past seeds and pick bonuses at random. Everything runs in your browser, and your seeds never leave your device.

Keno Seed Checker

Live

Enter your seeds and nonce to see the exact 10 numbers Gamba drew, or scan a whole range of nonces.

Random Bonus Picker

Soon

Paste your bonus list and let the picker choose which one to open next.

More Tools

Soon

More checkers and calculators for other Gamba games are on the way.

Keno Seed Checker

Uses Gamba's own formula: 40 squares, 10 numbers drawn

Click squares on the board to pick them, just like on Gamba.

Rotate your seed pair on Gamba first. The server seed is only revealed after it has been rotated out.

Your pick Drawn Hit
Nonce
–
Hits
–
Multiplier
–
How this result is calculated
Server binary seed
–
Client binary seed
–
HMAC message
–
  1. Both seeds are turned into a "binary seed" with PBKDF2-SHA512 (salt mnemonic, 2048 rounds). The first 32 hex characters are hex-encoded again, which gives 64 characters.
  2. HMAC-SHA256 is run with the server binary seed as the key and clientBinary:nonce:round as the message. Round 0 and round 1 give 64 bytes.
  3. Every 4 bytes become one float between 0 and 1. That gives 10 floats.
  4. Each float picks a square from the ones still left: floor(float × (40 − i)). That square is then removed, so no number can come up twice.