Wi-Fi QR codes: sharing your Wi-Fi with customers without reading out the password
"What's the Wi-Fi password?" In a café, the question comes up all day. A QR code or a Wi-Fi card saves you from reading out a complicated password. Here are the two ways to do it, and the safety rules.
Updated 6 October 2026
The classic Wi-Fi QR code
There's a special QR code format for Wi-Fi: it holds the network name, the security type and the password. iPhones and most recent Android phones recognise it with the camera and offer to connect in one step.
Its limit: the password is written into the QR code. The day you change it, you have to reprint every QR code.
A Wi-Fi page you can change
Another option: a QR code or an NFC card that opens a page with the network name, the password and a button to copy it. Customers paste it into their Wi-Fi settings.
It's one more step for customers, but you can change the password on the page in seconds, without reprinting anything. The same page can also show your menu, your Google review link or your Instagram.
The safety rules
- Set up a guest network, separate from the network used by your till, cameras and business computer. Many routers allow it.
- Change the guest network password from time to time.
- Never share the router's admin password.
- If your router allows it, limit the speed per device so everyone keeps a decent connection.
With Lemsa
The Lemsa card can open a Wi-Fi page: the network name, the password hidden then shown with one tap, and a "Copy" button. With the Pro plan, you change the password from your account, and the printed card stays the same. Put it on the tables or at the counter, next to your menu.