QR Code Reference Guides
Short articles answering the questions that come up when you print and use QR codes.
QR Code Types and Data Formats
Learn what each supported QR code scheme encodes and which string formats scanners commonly recognize.
Read the guide →
QR Code Error Correction Levels Explained
What L, M, Q, and H mean, and which one to pick.
Read the guide →
How Big Should a QR Code Be?
Estimate QR code size from the expected scanning distance.
Read the guide →
Why Won't My QR Code Scan?
Check seven common causes of QR code scan failures.
Read the guide →
How to Make App Store and Play Store QR Codes
Where to find the right URL, what each part means, and how to handle iPhone and Android with one or two codes.
Read the guide →