Is my Wi-Fi password safe?

It is written into the QR code and nowhere else: nothing is uploaded. Remember that anyone who can scan or photograph the printed code can read the password.

Which devices can scan it?

iPhones (iOS 11 and later) and Android phones (10 and later) connect straight from the camera app.

Do these QR codes expire?

No. They are static codes: the content is stored in the pattern itself, with no redirect through our servers, no tracking and no expiry. They work for as long as the content stays valid.

Wi-Fi QR Code Generator - Free Online Tool

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Create a QR code that lets guests join your Wi-Fi without typing the password.