QR code scanning distance matters more than many people realize. A code that scans perfectly on a phone screen can fail once it is printed too small or viewed from too far away.
What affects scanning distance?
- Physical size of the QR code
- Camera quality and focus speed
- Lighting and glare
- Contrast and background clutter
- Print sharpness
A simple rule of thumb
The farther away a person is expected to scan, the larger the code should be. For tabletop or hand-held use, a small code is fine. For posters or signs, size up fast.
Where people get this wrong
Most failures happen when a designer shrinks the QR too much inside a visually dense layout. A beautiful sign is not helpful if nobody can scan it quickly.
Test scan distance before you print
Generate a QR code, print a sample, and test it from the real distance people will use.