Practical guidance
QR code guides
Understand the choices that affect reliability, troubleshoot common problems and prepare QR codes for real use without sales language or false guarantees.
These guides support the tools on this site. They focus on decisions you can test: what a QR code contains, how its image is constructed and what happens after someone scans it.
Start with the problem in front of you
If an existing code is failing, use the troubleshooting guide and QR Code Checker. If you are planning print, review error correction and use the print size calculator before approving artwork.