Giveaway winner picker with proof
Paste your entries and pick one or more winners. The verifiable mode uses a public random value so nobody can say you rigged it, and you get a proof you can post with the results.
List fingerprint:
The verifiable method fingerprints your sorted list, then takes the public drand random value for a round you name. The winners are a fixed calculation on those two things, so nobody (including you) can steer the result, and anyone can recompute it. Your list is processed in your browser and is not uploaded. Instant mode uses your browser's secure random generator and leaves no proof. Follow the rules of the platform where you run your giveaway.
How the verifiable draw works
- 1Your list is cleaned and sorted, so everyone builds exactly the same list.
- 2The list gets a fingerprint: its SHA-256 hash. Change one name and the fingerprint changes.
- 3You name a drand round. drand is a public randomness beacon that publishes a new random value every 3 seconds, and nobody can know a future value in advance.
- 4The winners are a fixed calculation on the list fingerprint and the random value. Nobody, including you, can steer it.
- 5You copy the proof and post it with the winners. Anyone can paste the same list and round into this page and get the same result.
How to run a giveaway people trust
- 1Close entries and save the final list of entrants.
- 2Post the list's fingerprint and the drand round you will use, before that round exists.
- 3After the round is published, press the button and post the winners with the proof.
- 4Keep the screenshot of the entries and the proof together.
Check the rules of the platform where you run the giveaway, and the laws about prize promotions where you and your entrants live. Some places require terms, odds and registration for larger prizes.
Honest limits
- The tool picks from the list you give it. It cannot know whether a list is complete or genuine.
- It does not read comments from social networks. Paste usernames you collected yourself.
- Instant mode uses your browser's random generator and leaves no proof, so it suits casual picks.
Prefer a lottery you can check?
CryptoDrawz: a weekly draw with 90% paid out.
$5 tickets paid in crypto. The winners come from a public random value, and every result is published so you can recompute it yourself. 18+ only.
For bloggers and site owners
Embed this tool on your site.
It is free. Copy the code below and paste it into your page. Please keep the credit line under the tool.
<iframe src="https://cryptodrawz.com/embed/giveaway-winner-picker" title="Giveaway winner picker with proof" width="100%" height="1000" style="border:0;max-width:960px" loading="lazy"></iframe>
<p style="font-size:14px">Free tool by <a href="https://cryptodrawz.com/tools/giveaway-winner-picker">CryptoDrawz</a></p>Frequently asked questions
How do I pick a giveaway winner fairly?
Use a method nobody can steer and everybody can check. A public random value plus a fingerprint of your list does that, and this tool produces the proof.
Can people check my result?
Yes. They paste the same list and drand round into this page and get the same winners.
Is my list uploaded?
No. It is processed in your browser only.
How many winners can I pick?
As many as you have entries. Each winner is picked without repeats.