How to Pick a Random Winner Fairly for a Giveaway

By HSP · Published October 5, 2026 · 5 min read · Passwords & Randomness

Whether you are running a social media giveaway, a charity raffle, an office secret-gift draw or choosing which student answers next, people want to know the result was fair. A fair draw has three parts: a clean list of entries, a genuinely random selection, and a transparent record of what happened. Here is how to get all three right.

Step 1: Write the rules before you start

Decide and publish the rules at the start, not after you see the entries:

• Who can enter (age, location, followers only, employees excluded).
• How to enter and how many entries each person gets.
• The closing date and time, including the time zone.
• How and when the winner will be chosen and contacted, and how long they have to reply before a backup winner is chosen.

Giveaways and raffles can be regulated, and the rules differ between countries and regions; some types of paid-entry raffle need a licence. Social platforms also have their own promotion policies. Check the rules that apply to you before launching anything with valuable prizes.

Step 2: Build a clean entry list

1. Export or copy all entries into one list, one entry per line: usernames, names, email addresses or ticket numbers.
2. Remove ineligible entries: late entries, entries that break the rules and your own account.
3. Remove duplicates if each person may enter only once. Paste the list into the remove duplicate lines tool with “ignore case” and “trim spaces” on, so “@Sam” and “@sam ” count as the same person. Our guide on removing duplicate lines explains the options.
4. Handle bonus entries deliberately. If the rules allow extra entries (for example, one per friend tagged), keep those duplicate lines on purpose, so the person appears as many times as they have entries.
5. Save a copy of the final list with the date. If anyone questions the result, you can show exactly which entries were in the draw.

Step 3: Draw the winner

Paste the final list into the random picker, choose how many winners you need, and turn on “no repeats” so the same entry cannot win twice. Click pick. The picker uses the browser’s cryptographically secure random generator, so every line has an equal chance, and the list stays on your device.

If you need runners-up, draw them in the same session, in order: winner, first backup, second backup. That avoids any suspicion that a backup was chosen later to suit someone.

Numbered tickets

For paper raffle tickets numbered 1 to 500, you do not need a list at all. Use the random number generator with a minimum of 1 and a maximum of 500, and turn off duplicates if you are drawing several prizes.

For live audiences

In a classroom, stream or event, a visual draw builds excitement. The decision wheel lets everyone watch the spin. It works best for a small number of options that fit on the wheel.

Step 4: Record and announce

• Record the draw. A screen recording showing the full list being pasted and the pick being made is the strongest proof. At minimum, take a screenshot showing the date and time.
• Contact the winner privately through the official account you used for the giveaway. Never ask for passwords or payment to “release” a prize; scammers often impersonate giveaway accounts with exactly that trick, so warn your followers.
• Announce publicly once the winner has accepted, if they agree to be named.

Why “random” needs a good random source

Not all random numbers are equal. Many programming languages’ default random functions, such as JavaScript’s Math.random(), are fine for games but are not designed to be cryptographically secure. For anything where fairness may be questioned, a cryptographically secure generator is a better choice. In browsers that is crypto.getRandomValues(), the same source used for generating strong passwords and random UUIDs.

A well-built picker also avoids modulo bias. If a program takes a random number from 0 to 255 and uses “number mod 100” to choose one of 100 entries, entries 0 to 55 get slightly more chances than the rest, because 256 does not divide evenly by 100. Good pickers reject out-of-range values and draw again, so every entry is equally likely.

Methods to avoid

• Picking by hand from comments: people naturally favour names they recognise or the top of the list.
• “First to comment wins”: rewards whoever saw the post first, not a random entrant.
• Scrolling and stopping: it feels random but it is not, and you cannot prove it.
• Shuffling in a spreadsheet and taking the first row without saving the original list: it can be fair, but it is hard to show afterwards.

Quick checklist

1. Publish rules before the giveaway starts.
2. Close entries on time and export them.
3. Remove ineligible entries and duplicates; save the final list.
4. Draw winners and backups with a secure random picker.
5. Record the draw and contact the winner through official channels.

Looking for fun ways to use random draws in class or with friends? See our ideas in brain games and skill tests.