Top 10 Reasons QR Codes Don’t Work (And How to Fix Them)
Sally Wright
Nov 9, 2025
QR codes have become a staple in modern marketing, packaging, and communication. From restaurant menus to business cards and billboards, they offer a seamless bridge between the physical and digital worlds.
However, despite their simplicity, QR codes often fail to deliver results. Not because the technology is flawed, but due to common implementation mistakes.
Here are the top 10 reasons QR codes don’t work and how to fix them.
1. Poor Print Quality
One of the most common reasons QR codes fail is poor print quality. If the code is blurry, pixelated, or smudged, scanners can’t read it. This is especially problematic when codes are resized incorrectly or compressed for print.
Fix: Always use high-resolution images when generating your QR codes. Vector formats like SVG or EPS are best for scalability. Before printing large batches, do a test scan to ensure quality.
2. Wrong Size
If your QR code is too small, it may be difficult to scan. If it's too large, it may distort or take up too much space on your material. Both can negatively impact the user experience.
Fix: The general rule is that QR codes should be at least 1 x 1 inch (2.5 x 2.5 cm). Consider the distance from which users will scan the code, and adjust accordingly.
3. Low Contrast
Scanners need clear contrast between the QR code’s foreground and background. Light gray codes on white paper or placing a code over a patterned image can make it unreadable.
Fix: Stick with a dark color (like black) on a light background. Avoid using gradients or backgrounds with complex patterns behind the code.
4. Bad Placement
QR codes placed in inconvenient or hard-to-reach spots, like underground subway posters, moving vehicles, or TV commercials, are unlikely to be scanned. If a user can’t stop and scan comfortably, you’ve lost them.
Fix: Make sure your code is placed in well-lit, accessible areas where users can pause and interact. Consider environmental factors like glare, elevation, or screen time.
5. Broken or Expired Links
There’s nothing more frustrating than scanning a QR code only to find a 404 error or outdated page. Static QR codes can’t be updated once printed, which becomes a major issue when URLs change.
Fix: Use dynamic QR codes that allow you to update the destination URL at any time. This is ideal for campaigns or content that changes frequently.
6. No Internet Connection
Many QR codes lead to web pages, which require an active internet connection. If the code is used in a location with poor connectivity, like basements or remote areas, users may not be able to access the content.
Fix: Use offline-friendly formats when possible, like linking to downloadable PDFs or local content. If online access is necessary, ensure good Wi-Fi or mobile data availability.
7. No Call to Action (CTA)
A QR code on its own doesn't entice users. Without context, people may ignore it because they don’t know what they’ll get from scanning.
Fix: Always include a call to action like “Scan to get 20% off,” “Watch our video,” or “Download the app.” Clear messaging increases scan rates dramatically.
8. Overdesigning the Code
While branded QR codes can look great, too much customization can compromise scanability. Excessive colors, embedded logos, or complex designs may make the code unreadable.
Fix: Design with care. Keep modifications subtle and always test the final code with multiple devices and apps to ensure it still works.
9. Using Static Codes in Dynamic Situations
Static QR codes are permanent, which can be limiting. If you’re running a campaign or need to change destinations frequently, static codes won't cut it.
Fix: Dynamic QR codes offer flexibility. You can change the URL later without reprinting the code, which is especially useful for marketing, inventory, and customer engagement.
10. Users Don’t Know How to Scan Them
Not all users are tech-savvy. Some may not know that most modern smartphones can scan QR codes directly from the camera app.
Fix: Include a brief instruction near the code, such as “Open your camera and point it here.” Offering alternative access methods, like short URLs or NFC tags, is also a smart move.
Conclusion
QR codes are incredibly useful when implemented correctly, but minor mistakes can render them ineffective. Whether you’re using them for marketing, product information, or payments, it's essential to understand these common pitfalls and how to avoid them.
By following these best practices, you can ensure your QR codes actually work and deliver the results you’re aiming for.
Need help generating high-quality, dynamic QR codes that work every time? QR Codes Unlimited has the tools and expertise to help you avoid these mistakes and make your campaigns successful.
