QR code guides

Short, practical answers to the questions people ask most about QR codes.

• Why did my QR code stop working?The six usual causes, how to find yours in seconds, and how to fix it for good.
• Static vs dynamic QR codes: which one do you need?What each kind is, what it costs you later, and which to choose for what you're printing.
• How to make a QR code that never expiresThree steps, about a minute, free: from what it opens to a print-ready file.
• How to print a QR code that scansMinimum size, scanning distance, contrast and the right file for a print shop.