Guides & articles
Clear, practical explainers about QR codes — how they work, how to design them, and where they fit.
What Is a QR Code? A Plain-Language Introduction
QR codes link the physical and digital worlds. Here is what the black-and-white squares are, how they store data and why they scan so reliably.
QR Error-Correction Levels: L, M, Q and H
Every QR code carries spare data so a scratched or covered code still scans. Learn what L, M, Q and H mean and how to choose the right one.
Wi-Fi and vCard QR Codes: Beyond Plain Links
QR codes can carry more than URLs. Learn the special text formats that let a scan join a Wi-Fi network or save a contact in one tap.
How QR Scanning Works
Pointing a camera at a code feels instant, but a lot happens in that split second. Here's how a scanner turns pixels back into your data.
QR Codes for Business: Practical Uses That Work
From menus to payments to packaging, QR codes cheaply bridge print and digital. Here are the uses that work and the rules that keep them scannable.
Static vs Dynamic QR Codes: What's the Difference
Some QR codes point straight at your content; others go through a redirect you can change later. Here's the trade-off, and when each is the right call.