Print one code for your home, office, café or event and let guests connect by pointing their camera at it. Your password is processed only on this device.
A Wi-Fi QR code contains your network password in plain text. A generator that processes it on a server can see that password. MeCard Plus builds the code entirely in your browser, so the password never leaves your device.
Put the code where guests naturally pause: a reception desk, a table tent in a café, the back of a meeting-room door or a welcome card in a holiday rental. Print it at least 3 cm wide at eye level, add a short label such as "Scan to join Wi-Fi", and keep it away from glare so phone cameras can focus quickly.
Yes. iPhones from iOS 11 and Android phones from Android 10 can join a network straight from the camera app.
The old code stops working because the password is stored inside it. Generate a new code with the new password and replace the printed one.
Anyone who scans the code can join, just as if you told them the password. For visitors, consider a separate guest network and print the code for that network only.