QR Code Settings
Customization
Understanding QR Code Generator
QR codes encode data in two-dimensional patterns. Black squares on white grids. Four error correction levels handle damage.
Two thousand seven hundred modules maximum. URL, text, WiFi formats supported. Reed-Solomon protects against tears.
How It Works
QRCode.js library runs in-browser. Canvas renders the matrix. PNG download exports raster data. Logo overlay centers graphic.
Input validation filters bad URLs. Color pickers modify foreground/background. Error level L is seven percent recovery. Level H reaches thirty percent.
Frictionless Utility
Paste URL, click generate, download PNG. Zero submit buttons. Zero server roundtrips. No tracking pixels anywhere.
Works offline after first load. No account wall. No API keys required. Perfect for printed materials.
FAQ
What formats can I generate?
URL and plain text, WiFi WPA credentials, open networks. PNG download only. No SVG export.
Is my content private?
Yes. QRCode.js runs locally. URLs stay in browser memory. Nothing leaves your device.
How large should prints be?
Minimum two by two centimeters. Five by five for distance viewing. Quiet zone margins required. Test before production.