QR codes are everywhere: restaurants, advertising posters, business cards, product packaging. But between a QR code that works perfectly and one that frustrates your users, there's a world of difference.
In this guide, we'll reveal all the secrets to creating flawless QR codes that actually convert.
The Fundamentals of a Successful QR Code
An effective QR code relies on three essential pillars: readability, design, and content relevance. Neglecting any of these aspects means risking precious scans.
Contrast: Your Best Ally
The golden rule is simple: always use dark colors on a light background. The minimum recommended contrast is 4:1, but aim for 7:1 for optimal readability in all lighting conditions.
- Works: Black on white, navy blue on beige, dark purple on light pink
- Avoid: Yellow on white, light gray on gray, neon colors together
With Sqanity, you can test your contrast in real-time and instantly see if your QR code will be scannable.
The Ideal Size Based on Usage
A QR code that's too small will never be scanned. Here are the minimum recommended sizes:
- Business card: 2 × 2 cm minimum
- Restaurant menu: 3 × 3 cm
- A4 poster: 4 × 4 cm
- A3 poster: 6 × 6 cm
- Billboard: Scanning distance ÷ 10
The magic formula? Divide the scanning distance by 10 to get the minimum size of your QR code.
Customize Without Compromising
A QR code customized with your brand colors generates up to 40% more scans. But be careful not to go too far!
What You Can Customize
- Dot colors (while respecting contrast)
- Dot shape: squares, circles, rounded
- Corners: add style without affecting readability
- A logo in the center (up to 30% of the surface)
What to Avoid
- Modifying the three positioning squares (in the corners)
- Using more than 2-3 colors
- Adding a logo that's too large
- Reducing the "quiet zone" (the white margin around)
The Importance of Error Correction Level
QR codes have a built-in error correction system that allows them to be scanned even if they're partially damaged or obscured. Sqanity offers 4 levels:
- L (7%): For simple QR codes without a logo
- M (15%): The standard for most uses
- Q (25%): Recommended if you add a small logo
- H (30%): Essential with a center logo
When you add a logo with Sqanity, we automatically switch to level H to ensure a perfect scan.
Test Before Publishing
Never skip testing! Before printing 10,000 flyers, check your QR code with:
- At least 3 different smartphones (iPhone and Android)
- The native camera app (not just a dedicated app)
- Different lighting conditions
- The final printed medium
Create Your Perfect QR Code Now
With Sqanity, creating a professional QR code takes just seconds. Our intuitive editor guides you at every step and alerts you if your design might cause problems.
Start for free on Sqanity.com — no registration required.