Complete guide to QR codes in 2026
QR codes went from a niche Japanese logistics tool to a global standard used for menus, payments, WiFi sharing, event check-ins, packaging authentication and marketing campaigns. This generator produces static QR codes — the destination is baked into the code itself, so nothing can be tracked or invalidated later. That means privacy and permanence, but no editing after printing.
Which QR type should I use?
- URL — the most common. Point to a landing page, product, review form or download.
- WiFi — guests scan and connect without typing passwords. Works on iOS 11+ and Android 10+ natively.
- vCard — business cards. Scanner adds you to contacts in one tap.
- SMS — pre-fills a text to a specific number. Useful for support and lead-gen.
- Email — opens the user's mail client with recipient, subject and body pre-filled.
Error correction levels explained
Higher error correction means the code can still be scanned when partially damaged, dirty or overlaid with a logo — at the cost of larger, denser modules. Use L for large clean prints, M for typical marketing use, Q when adding a small centered logo, and H for harsh outdoor conditions or heavy branding.
Print size formula
QR side length in cm ≈ scan distance in cm ÷ 10. A code scanned from 2 meters needs ~20 cm. Add a quiet zone (whitespace border) of at least 4 modules on all sides — without it, scanners often fail.
Pair QR codes with virtual numbers
Running a marketing campaign that captures leads via SMS? Pair a QR code (SMS type) with a dedicated virtual number from SMSVerifyo to track responses per channel without exposing your real phone.