QR Code Generator lets you create custom QR codes with your choice of colors and sizes. Set the error correction level, customize appearance, and download in PNG or SVG format. Perfect for websites, business cards, marketing materials, and more.
What is a QR Code?
QR Code (Quick Response Code) is a 2D barcode invented by Denso Wave in 1994. Unlike traditional barcodes that only store data horizontally, QR codes store data in both dimensions, allowing much more information in a compact space. Modern smartphones can scan QR codes using their cameras.
Error Correction Levels
- Level L (Low): ~7% recovery, smallest size, for clean environments
- Level M (Medium): ~15% recovery, balanced choice for most uses
- Level Q (Quartile): ~25% recovery, good for outdoor or printed materials
- Level H (High): ~30% recovery, best for harsh conditions or when adding logos
Common Use Cases
Website URLs: Direct users to websites without typing. Mobile Payments: WeChat Pay, Alipay, and other payment systems. Product Information: Link to manuals, specs, or authentication. Contact Cards (vCard): Share contact info by scanning. WiFi Sharing: Connect to WiFi without entering passwords. Event Check-in: Conference badges, tickets, and access control.
FAQ
Q: How much data can a QR code store?
A: Maximum capacity is about 3KB: 7,089 numeric characters, 4,296 alphanumeric characters, or 2,953 bytes of binary data. In practice, keeping content under 100 characters ensures the code stays easily scannable. Longer URLs should be shortened first.
Q: Can I use custom colors for QR codes?
A: Yes, but maintain sufficient contrast. Dark colors should be significantly darker than light colors for reliable scanning. Avoid using similar colors or inverting (light on dark). This tool lets you customize both foreground and background colors.
Q: PNG vs SVG - which format should I choose?
A: PNG is a raster format - good for fixed-size web use and easy sharing. SVG is a vector format - scales to any size without quality loss, ideal for print materials, large displays, or when the final size isn't known. Choose SVG for print, PNG for quick sharing.