Common QR Code Scanning Problems You Need to Avoid
Jonathan Palley
Feb 13, 2025
QR codes have become an essential tool for businesses and individuals alike. They are used for everything from directing customers to websites to providing contactless access to information. However, despite their widespread use, scanning issues can still occur. Poorly generated or printed QR codes can lead to a frustrating experience for users, resulting in lost opportunities or broken connections.
In this blog, we will highlight some of the most common QR code scanning problems and provide tips on how to avoid them. Whether you're designing your own QR codes or simply troubleshooting a problem, understanding these issues can make a significant difference in the success of your QR code campaigns.
Poor Quality QR Code
Problem: One of the most common issues with QR code scanning is poor image quality. If a QR code is blurry, pixelated, or low-resolution, it can become unreadable, frustrating users trying to scan it.
Causes:
- Low-resolution images
- Incorrect resizing or compression
Solutions:
- Always generate high-resolution QR codes. This ensures the code can be scanned clearly, even if printed at larger sizes.
- Avoid compressing or resizing the QR code in a way that distorts it.
- Use reputable QR code generators that prioritize quality and offer various export options.
Misalignment or Crooked QR Codes
Problem: QR codes that are misaligned or tilted can be difficult or impossible to scan properly. Even a slight tilt can make the code unreadable.
Causes:
- Printing errors
- Improper display orientation
Solutions:
- Ensure that your QR code is printed or displayed in a straight position. When designing, check that the code is perfectly aligned.
- Avoid skewing or rotating the QR code unnecessarily, as it can hinder scanners from recognizing the code.
Inadequate Contrast Between QR Code and Background
Problem: QR codes that lack sufficient contrast with their background can be hard to scan, especially if the background is too busy or a similar color to the code itself.
Causes:
- Dark QR codes on dark backgrounds or light QR codes on light backgrounds
- Complex background patterns that interfere with the code
Solutions:
- Ensure that your QR code has a high contrast against the background. A black code on a white background is the most reliable option.
- Avoid placing QR codes on patterned, colorful, or textured backgrounds that could distract from the scan. A plain background is best.
Small or Unreadable QR Codes
Problem: QR codes that are too small to scan are a common issue. If the code is too tiny or placed in an area that’s difficult to view, it may not work at all.
Causes:
- Reduced size for design purposes
- Print or screen resolution limitations
Solutions:
- Follow the recommended size guidelines. For printed codes, aim for at least 1 inch by 1 inch in size. For screens, ensure the code is large enough to be scanned from a reasonable distance.
- Test the code on different devices to ensure it’s scannable at various sizes.
Damaged or Distorted QR Codes
Problem: Physical damage or environmental wear can distort QR codes, rendering them unreadable. This is especially true for QR codes on stickers, posters, or packaging that may be subjected to handling or weather conditions.
Causes:
- Torn, scratched, or faded printed QR codes
- Exposure to the elements (e.g., moisture or sunlight)
Solutions:
- Print QR codes on durable materials, such as weather-resistant stickers or labels.
- Regularly check printed QR codes to ensure they aren’t damaged or fading. Replace them as needed.
Incorrect Encoding or Link Errors
Problem: If the QR code leads to a broken or incorrect URL, it can frustrate users and harm your credibility. QR codes are only as good as the information encoded into them.
Causes:
- Encoding mistakes during QR code generation
- URLs that are outdated or no longer active
Solutions:
- Double-check the URL or data you input when generating your QR code to ensure accuracy.
- Regularly test your QR codes to confirm that the links are still active. If the content changes or is removed, update your QR codes accordingly.
Low-Quality Mobile Devices or Outdated Apps
Problem: Some users may struggle to scan QR codes due to outdated technology. Older devices with poor-quality cameras or outdated apps can affect scanning performance.
Causes:
- Older devices with lower-quality camera sensors
- Outdated QR scanning apps
Solutions:
- Ensure that your QR code is compatible with a wide range of devices. Test the code on different models and apps.
- Encourage users to update their QR code scanning apps or use built-in camera apps that support QR code scanning.
Overcomplicated QR Codes
Problem: Overloading a QR code with too much data, such as lengthy URLs or unnecessary information, can make it hard to scan accurately.
Causes:
- Embedding large amounts of data, including long URLs or complicated contact information
Solutions:
- Simplify your QR code’s data. Use URL shortening services to create more manageable links.
- Limit the data embedded in the QR code to essential information only, making it easier for the scanner to read.
Environmental Factors
Problem: External factors such as lighting or glare can also affect the scanning process, making it difficult for scanners to read the QR code.
Causes:
- Poor lighting conditions (too bright or too dark)
- Glare or reflections on the QR code’s surface
Solutions:
- Ensure there is adequate lighting when scanning a QR code, but avoid direct sunlight or extremely bright lights that cause glare.
- Avoid placing QR codes on reflective surfaces. If the surface is unavoidable, consider using a matte finish to reduce reflections.
User Error and Misuse
Problem: Users may not always know the proper way to scan a QR code, leading to failed attempts.
Causes:
- Holding the phone too close or too far
- Misaligning the camera with the code
Solutions:
- Provide clear instructions for users on how to scan a QR code, such as “hold your phone 6-8 inches away” or “center the QR code in your camera frame.”
- Consider adding a visual or instructional guide alongside the QR code to help users scan successfully.
Conclusion
QR codes are an incredibly powerful tool, but they are only as effective as the way they are created and presented. By avoiding the common scanning problems outlined in this blog, you can ensure that your QR codes work seamlessly for your audience.
Regularly test your QR codes for quality, readability, and functionality, and always be mindful of the design, size, and environment in which they will be used. With these precautions in place, you can create a smooth and user-friendly scanning experience that will help drive engagement and success.
