Question 1

Is FairPicker free?

Accepted Answer

Draws with 300 or fewer entries are free. Larger draws have a small per-draw fee.

Question 2

Can the draw result be rigged?

Accepted Answer

No. The SHA-256 hash and the server seed published before the draw let anyone verify the integrity of the result.

Question 3

Which platforms can I run a draw on?

Accepted Answer

Instagram, YouTube, major Korean community boards (Naver Cafe, Daum Cafe, FM Korea, MLBPark, etc.), and Excel files.

Question 4

What is a provably fair raffle picker?

Accepted Answer

A provably fair raffle picker is a tool designed so anyone can verify the draw mathematically. FairPicker uses a SHA-256 hash and a server seed committed before the draw to make tampering impossible.

Question 5

Why use a provably fair raffle service?

Accepted Answer

Hosts get an integrity certificate they can show participants; participants get an independent way to verify that the draw was not rigged.

Question 6

How is this different from a plain random picker?

Accepted Answer

A plain random picker rolls a result internally with no way to verify when or how it was generated. FairPicker combines a server seed and a client seed under SHA-256, so any participant can reproduce the result with the same inputs and prove that it was not changed.

Question 7

What is FairPicker's integrity certificate?

Accepted Answer

A digital document issued the moment a draw completes, locking in the Project ID, Server Seed, Client Seed, and SHA-256 Final Hash. Anyone can reproduce the result with the same inputs to confirm there was no tampering. Free draws include a web certificate; paid draws also include an A4 PDF and a 4:5 social image suitable for Instagram or audit packets.

Question 8

How do I share the certificate when announcing winners?

Accepted Answer

Post the certificate link (e.g. fairpicker.net/cert/xxxxx) together with the winner list — participants can open it and check the draw time, entry count, and hash themselves. Use the 4:5 SNS image for Instagram and the A4 PDF for company or government audits.