Fundamentals6 min read
Do QR codes expire? The honest answer
Static QR codes never expire. Dynamic ones stop working the day the provider decides. Here is how to tell which one you have before you print 5,000 of them.
QR code guides
Straight answers about printing, scanning and designing QR codes — written by the people who built the generator.
Troubleshooting8 min read
Why is my QR code not scanning? 11 causes, in order
A diagnostic checklist ordered by how often each cause actually happens — from logo coverage and low contrast to inverted colours and damp cardboard.
Printing7 min read
QR code size for print: the definitive chart
The 10:1 rule, minimum sizes for business cards, flyers, posters and billboards, plus the quiet zone and resolution numbers printers actually need.
Design7 min read
How to add a logo to a QR code without breaking it
Error correction levels explained, the 25% coverage limit, which parts of the code you must never cover, and how to test before you print.