How does the Facebook giveaway picker work?
The tool selects a winner from a locked participant list using the announced drand randomness. Locking the list fixes the pool of entries used to calculate the result.
| Part of the draw | What it means for you |
|---|---|
| Locked participant list | The draw uses a fixed set of participants. |
| Randomness specified in advance | The source used for selection is announced beforehand. |
| Browser verification | Anyone can recalculate the result and check it matches. |
| Sign-in on the platform's own screen | You do not give the tool your Facebook password. |
For example, imagine a bookshop giving away a reading bundle. Once its participant list is locked, verification checks the winner against that list and the specified randomness.
What should you prepare before your draw?
Prepare clear entry instructions and decide how you will explain the result. Keep the conditions consistent with what you can actually check.
Use this preparation checklist:
- Describe the prize clearly, including any restrictions relevant to entrants.
- State when entries close and make the time zone explicit.
- Explain which entries qualify and how you intend to handle repeated entries.
- Tell participants that the list will be locked before selection.
- Explain that the result can be independently recalculated in a browser.
These are planning decisions, not a promise of automatic filters. For the bookshop example, the organiser should settle the entry conditions before inviting people to participate, rather than make those decisions after seeing who entered.
Why does verifiable randomness matter?
Verifiable randomness lets people check the calculation behind a winner selection. drand provides publicly verifiable random values, as described in its official documentation.
For this Facebook random winner picker, the locked list and announced randomness work together: the list defines who is included, and the randomness is used to select the result. Anyone can then repeat the calculation in their browser.
A useful explanation for your audience is:
“The participant list is locked before selection. The draw uses drand randomness specified in advance, and you can recalculate the result in your browser.”
This verifies selection from the locked list. It does not, by itself, prove that every participant met every entry condition.
Can the tool verify likes or story shares?
No. Facebook likes and story shares are not verified by this tool, so your giveaway instructions should not describe them as automatically checked.
| Proposed condition | What you should communicate |
|---|---|
| Liking a post | The tool does not verify this action. |
| Sharing a story | The tool does not verify this action. |
| Being selected from the locked list | The result can be recalculated and checked. |
For example, do not tell entrants that the picker will automatically exclude anyone who has not shared a story. Prepare your Facebook giveaway around conditions you can explain and assess accurately.
Frequently asked questions
The key distinctions are between login, winner selection and entry checks. Here is what to expect before you prepare your giveaway.
Do I need to give the tool my Facebook password?
No. The service uses the platform's own sign-in screen and does not ask you to hand over your password. Any password entry needed to sign into Facebook belongs in Facebook’s own login flow.
Can participants check the winner themselves?
Yes. Anyone can recalculate and verify the result in their browser using the locked participant list and the specified randomness. This gives your audience a way to check the selection beyond a winner announcement.
Does verification confirm that every entry is eligible?
No. Reproducing the result confirms the selection from the locked list; it does not independently establish whether every entry met your conditions. In particular, likes and story shares are not verified.