What makes a QR code 'high quality'?

A high-quality QR code has good contrast (dark foreground on light background), adequate size, clear module edges, proper quiet zone (white border), and appropriate error correction level.

Why won't my QR code scan?

Common reasons include: low contrast colors, QR code too small, blurry image, missing quiet zone, or damaged/distorted modules. Our test identifies these issues specifically.

What is the minimum size for a scannable QR code?

For reliable scanning, QR codes should be at least 2×2 cm (about 0.8×0.8 inches) for handheld scanning. Larger viewing distances require proportionally larger codes.

Does the quiet zone really matter?

Yes! The quiet zone (white border) helps scanners identify where the QR code begins and ends. A minimum of 4 modules of white space on all sides is recommended.

Can I use colored QR codes?

Yes, but maintain high contrast. Dark colors on light backgrounds work best. Avoid light-on-light or dark-on-dark combinations. Our test checks contrast ratio.

QR Quality Test

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