7 Ways Speakers Use QR Codes Wrong

QR codes on presentation slides have become the default way speakers share resources. A well-placed code turns every person in the room into a potential subscriber and long-term follower. Most speaker QR codes underperform, and the reasons almost always trace back to a handful of avoidable mistakes.

Here are the seven most common errors and what to do instead.

1. Making the code too small

This is the most common mistake, and it has the clearest fix. Speakers add a QR code to a corner of a slide, size it as a modest inset, then wonder why the scan rate is low.

QR codes need to be large enough to scan reliably from the back of the room. In a conference breakout session, the code should occupy at least 25% of the slide area. In a main stage or ballroom setting, closer to 35–40%.

When you're standing at the front of the room, a code that looks large on your laptop screen looks like a small box to someone in row 10. Always size for the back row, not the front.

A detailed sizing guide is in The Perfect Slide QR Code: Size, Placement, and Design.

2. Putting the code only on the last slide

The last slide is a natural place for a QR code, but it should not be the only slide. Attendees build intent throughout your talk. Some decide they want your resources 20 minutes in. Some are already scanning during your introduction.

If the code only appears at the end, you miss everyone who makes that decision before the final slide, and you miss latecomers who never see the opening at all.

The fix: Put the QR code on your title/opening slide and your dedicated resource slide. Consider a persistent small version in the footer of every slide for long talks.

3. Rushing past the QR slide

You've given your closing line. The room is responding. You feel the momentum of finishing and click past the QR slide in five seconds.

You just lost most of your scans.

Scanning a QR code takes 10–15 seconds for most people. They notice it, decide to scan, get their phone out or shift to the camera app, aim, wait for focus, and follow the prompt. If you advance before they finish, they lose the code.

A QR slide needs at least 20–30 seconds on screen, with you actively prompting from stage. Not talking about content — talking people through the scan. "Scan right now. I'll wait. Get the camera open, there you go." This feels slow. It produces results.

4. Linking to the wrong destination

A QR code is only as useful as the page it leads to. The most common wrong destinations:

A PDF. The attendee downloads or views a file. No relationship forms, no email gets captured, and you have no visibility into who accessed it.

Your homepage. Attendees arrive at a general website with no clear connection to the talk they just heard. Context is lost and conversion to email opt-in is near zero.

A Linktree or link-in-bio page. Better than a homepage, but generic. It shows all your links, not the resources from this specific talk.

A gated form. The attendee scans expecting resources and hits a form before seeing anything. Many leave immediately.

The right destination: a talk-specific resource page that immediately shows your materials and offers an optional email opt-in. See QR Code That Collects Email Addresses: A Guide for Speakers.

5. Not prompting from stage

A QR code on a slide is passive. Attendees notice it, or they're writing notes, looking at you, or reviewing something on their own device.

The difference between a 5% scan rate and a 30% scan rate is usually one thing: the speaker actively told people to scan.

Your on-stage prompt is your conversion mechanism. Something like:

"Scan this right now — you'll have everything from today's talk in your pocket before you leave the room. I'll give you thirty seconds."

Then stop talking, keep the slide up, and let people scan. The pause does not feel awkward to the audience — they're on their phones. It only feels awkward to you.

Speakers who don't prompt at all leave most of their potential scans on the table.

6. Using a code that leads to a login wall or broken page

This seems obvious, but it happens often — especially when speakers use platforms that require authentication to view resources, or when a shared drive link is set to restricted access.

Test your QR code before every talk, on your actual phone, over cellular (not your home Wi-Fi where everything works fine). Check:

• Does the page load in under 3 seconds?
• Does it load without requiring a login?
• Does it display correctly on mobile?
• Is the URL live and not returning a 404?

A broken QR code does active damage. Attendees who tried to scan and got an error now associate a negative experience with following up with you.

7. Never updating the destination

A static QR code embedded in a slide deck from years ago points to whatever URL was entered at creation time. If you've changed platforms, restructured your website, or the destination URL has gone stale, every scan leads somewhere broken or irrelevant.

The fix: Use a dynamic QR code with a persistent URL you control. Dynamic codes let you change the destination without reprinting the code or updating your slides. Fanflet generates a persistent dynamic QR code for each fanflet — the URL never changes, so old slides still work correctly after you update your resources.

For any QR code you plan to use across multiple talks, make sure the destination is durable and updateable.

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None of these mistakes are hard to fix. The pattern is consistent: speakers who get real results from QR codes treat the code as a core element of their presentation, not a footer item they remembered to add. They size it properly, prompt actively, give it time, and link it to a destination designed for the moment. That's the entire formula.