A QR code is only useful if it scans reliably. Whether you're printing a code for a storefront window or a business card, a few design and placement choices make a significant difference in scan success rates.

1. Maintain Strong Contrast

Dark modules on a light background scan far more reliably than low-contrast color combinations. Avoid pairing similar shades (like light gray on white) for your foreground and background colors.

2. Size the Code for Its Scanning Distance

A general rule of thumb: the QR code's size should be at least 1/10th of the expected scanning distance. A code meant to be scanned from 10 feet away should be roughly 12 inches per side, while a code scanned up close (like on a business card) can be as small as 0.8 inches.

3. Leave Quiet Zone Margins

QR codes need a small margin of blank space around them (called the "quiet zone") to scan properly. Avoid placing text or graphics directly against the edge of the code.

4. Choose the Right Error Correction Level

QR codes support four error correction levels: Low, Medium, Quartile, and High. Higher levels allow the code to remain scannable even if partially damaged or obscured (such as by a logo), at the cost of a slightly denser pattern. Use Medium for general use, and High if you're adding a logo overlay.

5. Avoid Distorting the Code

Stretching a QR code non-proportionally (wider than tall, or vice versa) can distort the pattern and make it unreadable. Always scale QR codes proportionally.

6. Print on Matte, Non-Reflective Surfaces When Possible

Glossy surfaces can create glare that interferes with a camera's ability to read the code, especially under bright lighting. Matte finishes generally scan more reliably.

7. Test Under Real-World Conditions

Before printing at scale, test your QR code under the actual lighting and distance conditions it will be used in — a dim restaurant, a sunny storefront window, or a fast-moving vehicle each present different challenges.

8. Keep Logos Proportional

If adding a logo to the center of your QR code, keep it small relative to the overall code size (generally under 25% of the total area) and use a higher error correction level to maintain scan reliability.

9. Test on Multiple Devices and Apps

Scan your QR code using both iPhone and Android devices, as well as a few different scanning or camera apps, to confirm consistent performance across platforms.

Final Thoughts

A great QR code strategy starts with a code that actually scans reliably. Following these design and placement principles will significantly reduce failed scans and improve the experience for everyone interacting with your codes. Create a properly optimized QR code with our free QR Code Generator.