QR Code Best Practices
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Mais Geradores QR
Size
Minimum 2×2 cm for close scanning. Scale up for distance (10× viewing distance = 10× code size).
Contrast
High contrast only. Dark on light works best. Avoid low-contrast combos like yellow on white.
Quiet Zone
Leave a 4-module white border. Do not place text inside this border.
Always Test
Scan with multiple devices before printing. A code that works on your phone might fail on others.