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QR Code Generator
Generate QR codes from text or URL
What is a QR Code Generator?
Creates QR codes encoding URLs, text, contact info, Wi-Fi credentials, and UPI links - scannable by any smartphone camera.
How It Works
QR codes encode data in a matrix of black/white squares with Reed-Solomon error correction. Levels: L=7%, M=15%, Q=25%, H=30% damage tolerance.
Example
URL QR at level M: approx 41x41 modules. Minimum print size: 2x2 cm for hand scanning; 10x10 cm for poster scanning distance.
Pro Tips
- Keep URLs short for simpler, more scannable QR codes.
- Test on multiple devices before printing - different apps have varying scanning performance.
- Level H allows adding a logo overlay while maintaining scannability (30% damage tolerance).
- UPI QR codes require a specific protocol format - use bank or UPI app generators for payments.
FAQ
What can a QR code store?▼
URLs (2,953 chars max), text, phone numbers, Wi-Fi credentials, vCards, UPI payment links.
How to scan a QR code?▼
Open phone camera (both Android and iOS have built-in scanning) and point at the code.
Do QR codes expire?▼
Static QR codes never expire. Dynamic (redirect-based) QR codes can be set to expire.
Are QR codes safe?▼
The code itself is safe, but it can link to malicious sites - always verify the destination URL.