What Is a QR Code?

A QR code (Quick Response code) is a two-dimensional barcode that stores information as a matrix of black and white squares. Smartphones can instantly scan QR codes with their cameras, directing users to websites, apps, Wi-Fi networks, or digital business cards.

What Can You Encode in a QR Code?

  • 🌐 URL — Most common use: link to a website, app store, or landing page.
  • 📧 Email — Pre-filled email composition.
  • 📞 Phone number — Dial on scan.
  • 💬 SMS — Pre-filled text message.
  • 📶 Wi-Fi — Connect to a network without typing the password.
  • 👤 vCard — Digital business card with contact information.
  • 📍 Location — Open Google Maps to a specific location.
  • 💳 Payment — UPI, PayPal, and other payment links.

QR Code Error Correction Levels

QR codes can still be scanned even when partially damaged or obscured. Error correction level determines how much damage the code can sustain:

LevelRecovery CapacityBest For
L (Low)~7%Clean digital displays
M (Medium)~15%General purpose (default)
Q (Quartile)~25%Industrial environments
H (High)~30%Logos overlaid on QR code, dirty surfaces

How to Create a QR Code Online

  1. Visit FavorTool QR Code Generator.
  2. Select the content type (URL, text, Wi-Fi, etc.).
  3. Enter your content.
  4. Customize colors and error correction level.
  5. Download as PNG or SVG.

QR Code Size Guidelines

  • Print minimum: 2×2 cm (0.8×0.8 in) for close-range scanning.
  • Billboard/large format: Scale proportionally — at 10 feet distance, use at least 20×20 cm.
  • Digital displays: At least 200×200 pixels.
  • Always include a quiet zone (white border) of at least 4 modules around the code.