QR Code Best Practices: 10 Rules for Better Scannability
Design, print, and deploy QR codes that actually get scanned. Avoid the most common mistakes.
1. Always Include a Call to Action
A QR code without context is a mystery box — most people will not scan it. Always place clear text next to the code explaining what the user gets: 'Scan for Menu', 'Scan to Save Contact', 'Scan for 20% Off'. The call to action should communicate value, not just instruction.
2. Maintain High Contrast
Dark modules on a light background is the universal standard. Black on white provides the best contrast and highest scan reliability. If you use brand colors, ensure the contrast ratio between foreground and background is at least 4:1. Never invert the colors (light modules on dark background) — most scanners cannot read inverted codes.
3. Size Appropriately for Scanning Distance
The minimum QR code size should be at least 1/10th of the expected scanning distance. A code scanned from 10 inches needs to be at least 1 inch. A code scanned from 3 feet needs at least 3.6 inches. When in doubt, print it larger.
4. Preserve the Quiet Zone
The white margin around the QR code is not decorative — it is required for scanners to detect the code's boundaries. Never crop into this space or place the code against a busy background. Leave at least 4 module widths of blank space on all sides.
5. Test Before Printing
Test every QR code with at least three different devices (mix of iPhone and Android) at the actual printed size and under realistic lighting conditions. A code that works on your screen may fail when printed at a smaller size or on textured paper.
6-10: More Essential Rules
6. Use short URLs. Shorter data means fewer modules, which means a cleaner code that scans more easily at smaller sizes. 7. Export as SVG for print to ensure crisp edges at any scale. 8. Use error correction level M or Q for most applications — this balances density with damage tolerance.
9. Do not place QR codes on curved surfaces unless you have tested extensively. Curvature distorts the code and can prevent scanning. 10. Track your results. Use UTM parameters or dynamic QR codes to measure scan rates, and iterate. A QR code with zero scans is a missed opportunity — adjust placement, size, or call to action and try again.