QR

Before Generating

1. Choose correct type — URL is not the only option. See types.md for vCard, WiFi, email, SMS, geo, etc.
2. Shorten dynamic URLs — Long URLs = dense codes = harder to scan. Use short links for tracking too.
3. Set error correction — L (7%) for clean environments, M (15%) default, Q (25%) with logos, H (30%) for harsh conditions

Sizing Rules

Minimum sizes by scan distance:

• Phone at arm's length (~30cm): 2x2 cm minimum
• Table tent (~50cm): 3x3 cm
• Poster (~1m): 5x5 cm
• Billboard (~5m): 25x25 cm

Formula: QR size = scan distance ÷ 10

Color & Contrast