How to Generate Random QR Codes for a Small Event

For a small event, the easiest way to use QR code check-in is to give every guest their own random code before they arrive. The code can be printed on an invitation, sent by email, or sent by WhatsApp. On event day, your check-in team scans the code, confirms the guest, and marks them as arrived. This works well for weddings, private dinners, workshops, community events, school events, and small company gatherings.

Why each guest should have a unique QR code

A common mistake is to generate one QR code for the whole event. That is fine if the code only opens a public RSVP page, but it is not enough for check-in. For attendance, each guest should have a unique random code tied to their name. That way, when the code is scanned, the check-in screen knows exactly who has arrived.

• It prevents the same code from being reused by different people
• It lets you record the exact arrival time for each guest
• It helps staff check in guests quickly without searching a long list
• It gives the organiser a cleaner attendance report after the event

Step 1: Prepare your guest list

Start with a simple spreadsheet. You do not need anything complicated for a small event. One row should represent one guest or one invited party, depending on how you want to check people in.

Recommended columns are Name, Email, Mobile Number, Group or Table Number, Guest Type, and Remarks. For a wedding, you might also include Side of Family, Table Number, Meal Preference, or Plus-One Name. Keep the names clean and remove duplicates before you generate codes.

Step 2: Create a random ID for every guest

The QR code should contain a random guest ID, not just the guest's name. A random ID is better because it is harder to guess, safer to share, and easier for your check-in system to match. For example, Amanda Tan might have an ID like WED-8K4F2Q instead of a QR code that simply says Amanda Tan.

If you are using a spreadsheet, you can create IDs manually for a very small list, or use a formula or event check-in tool to generate them automatically. The important rule is that no two guests should have the same ID.

Step 3: Turn each ID into a QR code

Once every guest has a unique random ID, generate a QR code for each one. The QR code can point to a secure check-in link or contain the random ID that your scanner recognises. For small events, many organisers start with a spreadsheet plus a QR code generator. For a smoother event-day process, use a check-in system that creates all QR codes from your guest list automatically.

Before sending anything to guests, test a few QR codes on your own phone. Scan the code, check that the correct guest name appears, and make sure a second scan shows that the guest has already been checked in. This duplicate-scan warning is important when guests forward emails or screenshots to someone else.

Step 4: Send the QR code to each guest

For weddings and private events, the message should feel warm and simple. Send the QR code a few days before the event, and remind guests to keep it ready when they arrive. Email is useful because it keeps the QR image clear. WhatsApp or SMS can work too, especially when guests may not check email often.

Your message should include the event name, date, venue, arrival time, QR code image, and a short instruction such as: Please show this QR code at registration for faster check-in. If the guest cannot find the code on event day, your staff should still be able to search by name.

Step 5: Set up check-in on event day

You do not need a complicated counter for a small event. One or two phones, tablets, or laptops are usually enough. Place the check-in point near the entrance, brief the helpers, and keep the flow simple: guest shows QR code, staff scans, system confirms the name, staff marks the guest as arrived, and the guest enters.

• Use a device with a working camera
• Charge all devices before doors open
• Prepare a mobile hotspot if the venue Wi-Fi is weak
• Keep a manual guest search ready for guests who forgot their code
• Print a backup guest list if the event is important

Example: wedding QR check-in flow

For a wedding with 120 guests, the organiser prepares a guest list with name, mobile number, email, table number, and meal preference. Each guest receives a unique QR code by WhatsApp or email three days before the wedding. At the reception table, two helpers scan QR codes using their phones. When a guest arrives, the helper sees the guest's name and table number immediately, then marks them checked in.

This keeps the entrance calm, helps guests find their tables faster, and gives the couple or planner a clear view of who has arrived without manually ticking names on paper.

Common mistakes to avoid

• Using one shared QR code for every guest
• Putting full personal details directly inside the QR code
• Generating codes before cleaning duplicate guest records
• Sending codes too late, when guests are already on the way
• Having no backup search for guests who forget their phones
• Not testing the scanner at the actual venue

The simple version

For a small event, the whole process can be simple: prepare a clean guest list, give every guest a random unique ID, turn each ID into a QR code, send the code before the event, and scan guests at the door. If you want to avoid doing this manually, SG Event Check-in can generate unique QR codes from your guest list, send them to guests, and track attendance live on event day.