Guides for QR codes that keep working
How to make one, print it so it still scans a year later, and change the file behind a printed code without reprinting anything.
QR Code on a Resume: When It Helps, Where It Goes, How Small It Can Be
Put a QR code on the resume you print, not the one you upload. In a scan test, a 2 cm code still read from 45 cm after a photocopy; a 1 cm code did not scan.
Read the guide
QR Codes on Real Estate Signs: What to Link, How Big to Print
What the QR code on a real estate sign should open, why a short link still scans at 4 m where a listing URL stops at 2 m, and how to keep the sign safe.
Read the guide
QR Code Not Scanning? Is It the Print, the Phone or the Link
A QR code that will not scan failed at the phone, the link or the print. 2 tests of 1 minute each tell you which, and the print fixes come with numbers.
Read the guide
Do QR Codes Expire? How Long a Printed Code Keeps Working
A QR code never expires on its own, but the service behind a dynamic one can. What 6 generators do when a trial or plan ends, with sources, and how to test.
Read the guide
How to Turn a Voice Recording Into a QR Code
Put a voice memo, a voicemail or any audio file behind a QR code that plays in the browser. Getting the file out, what to print it on, who can hear it, and how long it lasts.
Read the guide
How Do QR Codes Work? What Is Actually Inside the Squares
How QR codes work, from the bytes in the grid to the redirect behind a dynamic code — including why two codes for the same link can look completely different.
Read the guide
How to Make a QR Code for a PDF That Keeps Working
How to make a QR code for a PDF in four steps — and how to pick the host, the error correction and the code type so it still scans a year after printing.
Read the guide