QR Codes: What They Are, How They Work, and How to Create One

QR codes are everywhere — restaurant menus, product packaging, business cards, event tickets. But what exactly are they, and how do they work?

What is a QR Code?

QR stands for "Quick Response." A QR code is a two-dimensional barcode that stores information in a pattern of black and white squares. Unlike traditional barcodes that store data in one direction, QR codes store data both horizontally and vertically, allowing them to hold much more information.

What Can QR Codes Store?

• URLs — link to websites, apps, or downloads
• Text — any plain text message
• WiFi credentials — scan to auto-connect to a network
• Contact info — vCard format for easy contact sharing
• Email/SMS — pre-filled messages
• Calendar events — add events to your calendar

Common Uses

• Restaurants — digital menus (accelerated by COVID-19)
• Payments — mobile payment systems worldwide
• Marketing — link print materials to digital content
• Authentication — two-factor auth apps, WhatsApp Web
• Ticketing — boarding passes, event tickets, transit passes

How to Create a QR Code

Use our free QR Code Generator to create QR codes instantly. Just enter your text or URL and download the image. No signup required.

For WiFi sharing, try our WiFi QR Code Generator — enter your network name and password, and anyone can scan the code to connect automatically.

QR Code Best Practices

1. Always test your QR code before printing
2. Make sure there's enough contrast (dark on light works best)
3. Don't make them too small — at least 2cm x 2cm for reliable scanning
4. Add a short label so people know what the code does
5. Use a URL shortener for long links to keep the QR pattern simple