How phones join Wi-Fi from a QR code
A Wi-Fi QR code holds text like WIFI:T:WPA;S:NetworkName;P:password;;. T is the security type, S the network name and P the password. H:true marks a hidden network.
On most recent iPhones, pointing the Camera app at the code offers to join the network. On many Android phones the camera or Google Lens does the same. Support depends on the phone and its version, so try it with a guest device first.
Names and passwords with special characters
The semicolon, comma, colon, double quote and backslash have a meaning inside a Wi-Fi code, so they are escaped with a backslash. A password like a;b:c is written a\;b\:c. This tool does that for you, so type the name and password exactly as they are.
Pick WPA / WPA2 / WPA3 for almost every modern router. The code uses the type WPA for all three. Choose None for an open network, and tick the hidden box only if your network does not broadcast its name.
Is it safe to put a Wi-Fi password in a QR code?
The password is stored in the code as plain text, so anyone who can see or photograph the code can read it. That is the same as writing the password on a note. Display it only where you are happy for people to join, such as a guest room or a cafe counter.
For guests, consider using your router's guest network, so visitors never reach your own devices, and change the password if the printed code goes missing.
Private by design
The QR code is drawn inside this page from what you type. Nothing is uploaded, stored or logged, and the page cannot make network requests, so it keeps working offline once loaded. A Wi-Fi password or UPI ID never leaves your device.
Questions
How to share a Wi-Fi password with a QR code?
Enter the network name and password on the Wi-Fi tab and download the QR. Print it or show it on screen so guests can scan it with their camera.
Is it safe to put a Wi-Fi password in a QR code?
The password is stored as plain text, so anyone who can see the code can read it. Use it where you are happy for people to join, ideally on a guest network.
Which security type should I choose?
Choose WPA / WPA2 / WPA3 for nearly all modern routers. Pick None only for an open network.
Why does my Wi-Fi QR code not connect?
Check the name and password match exactly, including capitals, and that hidden network is ticked only if the network is hidden. Some older phones need a QR scanner app.
Is my data uploaded or saved anywhere?
No. The QR code is built in your browser and the page blocks network requests, so your UPI ID, Wi-Fi password and text never leave your device.