Events are one of the few places where nearly everyone has a phone in hand and a reason to use it. A well-placed QR code saves a printed program, shortens the registration line and gets you feedback while the experience is still fresh. A badly placed one is just decoration. This guide walks through the moments where QR codes work best at conferences, workshops and meetups, and how to set each one up.
1. Registration and check-in
Most ticketing platforms already generate a unique QR code per attendee that staff scan at the door. Your job is to make that code easy to find: send it in the confirmation email, again 24 hours before the event, and tell attendees to save a screenshot in case the venue has weak signal.
For small, free events without a ticketing platform, a single QR code at the entrance that opens a short sign-in form works well. Keep the form to three fields – name, email, company – and put the code on a stand at eye level, not on the floor or on a table where people must bend over.
2. The schedule and venue map
Printed agendas go out of date the moment a speaker cancels. Link a QR code to a mobile-friendly schedule page instead, and update that page as things change. Place the code on the lanyard or badge back, at the registration desk and next to each room door. A dynamic QR code (or a short URL you control) lets you change the destination later without reprinting anything.
3. Networking: contact sharing in one scan
Business cards still circulate at events, but most end up in a drawer. A QR code on the attendee badge that opens a contact page, a LinkedIn profile or a WhatsApp chat is faster and harder to lose. Three options, from simplest to most complete:
- LinkedIn profile URL – zero setup, but people still have to tap "Connect".
- WhatsApp link with a prefilled message – for example "Hi, we met at the Fintech Summit". The conversation starts immediately and the context is saved. Build it with a WhatsApp link generator and then turn it into a QR code.
- vCard QR code – the phone offers to save the contact directly. Useful, but the code becomes dense, so print it larger.
4. Sessions: slides, resources and live polls
Put a QR code on the last slide of every talk that links to the slides, the resources mentioned and the speaker's contact. Leave it on screen for at least 20 seconds during Q&A. For a room of 200 people, the code should be at least 20% of the screen height so it scans from the back rows.
5. Feedback while people are still in the room
Response rates to post-event survey emails are often low. A QR code shown at the end of the last session, with a two-minute survey and a clear reason ("we use this to choose next year's speakers"), catches people while they still remember the sessions and usually gets more answers than an email sent days later. Add it to the exit signage and the table tents at the coffee area too.
Size and placement guide
| Placement | Typical scan distance | Minimum QR size |
|---|---|---|
| Badge or lanyard | 30–50 cm | 2.5 × 2.5 cm |
| Table tent | 50–80 cm | 3–4 cm |
| Roll-up banner or door sign | 1–2 m | 10–20 cm |
| Projected slide | 5–15 m | 20% of screen height or more |
A practical rule: the code should be about one-tenth of the distance from which people will scan it. Always keep a quiet zone (white margin) of at least four modules around the code, and use dark code on a light background.
Measure which codes get scanned
If every code points to the same URL, you won't know whether people scanned the badge, the banner or the slide. Give each placement its own UTM tags, for example utm_source=badge&utm_medium=qr&utm_campaign=summit-2026 and utm_source=banner for the banner version. Build the URLs with a UTM builder, then generate one QR code per URL with the QR code generator. After the event, GA4 shows which placements earned their space.
Mistakes to avoid
- Linking to a desktop page. Test every destination on a phone over mobile data, not office Wi-Fi.
- No call to action. "Scan for the schedule" or "Scan to share your contact" doubles the reason to scan.
- Printing before testing. Scan the final printed proof with an iPhone and an Android phone.
- Venues without signal. If coverage is poor, publish the Wi-Fi password next to the code or offer a printed backup.