A WiFi QR code is just a short, standardized text string: the SSID, encryption type, and password: encoded as a black-and-white pattern that any modern phone camera can read. Guests join the network by pointing their camera at it; no typing, no shoulder-surfing, no whiteboard.
What's actually in the QR code
WiFi QRs follow a simple format defined by the Wi-Fi Alliance. The scanner parses this string and pre-fills the join dialog.
WIFI:T:WPA;S:Acme-Office;P:Mint-Sparrow-Atlas-7421;H:false;;
T:Encryption type: WPA, WEP, or nopassS:Network name (SSID). Special chars ;,:\" must be backslash-escapedP:The password itself. Omitted when T is nopassH:true if the SSID is hidden (not broadcast)
Security caveats
Good for
- Reception-area guest SSIDs
- Tabletop cards for clients in meeting rooms
- Events, cafés, coworking spaces
Avoid for
- Staff / production networks, share via vault instead
- Posting on a public website, anyone can join
- Online generators that send your password to a third party
Important: the QR code itself is not encrypted. Anyone who photographs it can decode the password, be deliberate about where you display it.
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