Wi-Fi QR Code Generator

What is actually inside a Wi-Fi QR code

A Wi-Fi QR code is not magic and it is not a link. It holds one short line of text in a format phones recognise: WIFI:T:WPA;S:NetworkName;P:password;; — the security type, the network name, and the password.

That matters for two reasons. First, the code works with no internet connection at all: the phone reads the text and configures itself. Second, anyone who scans it can read the password. A QR code is not encryption — it is just a way of writing text that a camera can read.

Where these are worth printing

Cafés and restaurants put one on the table so staff stop reciting a 20-character password. Airbnb and guest houses laminate one on the fridge. Offices put one in the meeting room for visitors. Any place where you would otherwise spell out a password aloud is a place this saves time.

Which phones can scan it

iPhones running iOS 11 or later scan Wi-Fi codes straight from the Camera app. Android 10 and later does the same from the camera or from Settings → Network. Older Android phones may need a QR scanner app, and a few very old devices cannot join this way at all — keep the written password somewhere as a fallback.

A word on security

Use your guest network if your router has one. That keeps visitors off the same network as your printer, your NAS and your laptop, and it means the printed code does not expose your main password.

Do not tape the code to a street-facing window. Someone can scan it from outside without ever entering the building. Inside, on a table or a wall, is fine.