By number
- Input
- 001 a 200 (200 números vendidos)
- Expected output
- Número ganhador sorteado + hash SHA-256 da lista
Publish the hash before drawing to prove the list closed there.
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raffle winner picker
In a raffle with sold numbers or names, the biggest source of distrust is not the draw itself, it is the suspicion that the list was tampered with after sales closed. This tool solves that by recording the SHA-256 of the exact list that went into the draw: any change to a single number shifts that hash entirely, so the organizer can publish the closed list before drawing and prove it never changed.
Publish the hash before drawing to prove the list closed there.
If the winner does not respond, the next in line takes over without a new draw.
Each prize comes from a different position in the same drawn sequence.
Publish the seed before drawing and the receipt afterwards. The receipt carries the seed, the SHA-256 fingerprint of the list and the winners. Anyone can paste those into the Verify tab and watch the same result appear, with no need to trust you or us.
Paste the list of sold numbers or names, one per line, set how many prizes and backups you want, and tap draw. The result includes the SHA-256 hash of the list used, for any participant to verify afterward.
Yes, because trustworthiness comes from the public seed plus the list hash, not from the video. By publishing both before drawing, anyone can redo the calculation afterward in a different browser and check whether the result matches exactly what was announced, with no need to take the organizer's word for it.
No. Rejection sampling eliminates the modulo bias that would slightly favor certain numbers, so every sold number has exactly the same probability of being drawn, regardless of its position in the list.
generated at draw time
Everything runs in your browser. The list is saved only on your device and is never sent to servers.