Learn QR Codes
Everything you need to know about QR codes, from the fundamentals to advanced technical topics. 17 articles organized by skill level.
QR Code Basics
BeginnerWhat is a QR Code?
Definition, history, capacity limits, and global adoption of QR code technology since 1994.
How QR Codes Work
Encoding process, module anatomy, finder patterns, data regions, masking, and Reed-Solomon error correction.
Types of QR Codes
All QR code data types explained: URL, WiFi, vCard, Email, SMS, Event, Location, Text, and UPI.
QR Code Examples
Real-world QR code examples for every data type with raw data formats and use-case guidance.
Tutorials
BeginnerCreating QR Codes
IntermediateChoosing the Right QR Code Type
Decision matrix and comparison table to pick the perfect QR code type for your use case.
QR Code Design Best Practices
Color contrast rules, quiet zones, minimum sizes, logo placement, and dot style guidelines.
Static vs Dynamic QR Codes
Side-by-side comparison of static and dynamic QR codes with pros, cons, and when to use each.
QR Code Size Guide
Print dimensions, 10:1 distance-to-size ratio, DPI requirements, and quiet zone rules.
QR Codes for Business
IntermediateQR Codes for Business Cards
vCard format spec, sizing for cards, design integration tips, and NFC vs QR comparison.
QR Codes for Restaurant Menus
Implementation guide with placement tips, multi-language support, and updating workflows.
QR Code Marketing Strategy
Campaign planning, UTM parameters, A/B testing, placement strategies, and ROI measurement.
Advanced Topics
AdvancedQR Code Security and Safety
Phishing risks, QRishing attacks, safe scanning practices, and URL preview techniques.
QR Code Password Protection
Encryption layers, access control, expiration dates, scan limits, and QRishing defence.
WiFi QR Codes: Complete Technical Guide
WIFI: format specification, security types (WPA2/WPA3), hidden networks, and guest network setup.
QR Code Error Correction Explained
L/M/Q/H levels, Reed-Solomon math simplified, and logo overlay compatibility by level.
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