Wi-Fi QR code

The code holds one line of text in the Wi-Fi format that the cameras of current iPhones and Android phones read: WIFI:T:WPA;S:name;P:password;;. T is the security type, S the network name, P the password and H:true marks a hidden network. In the name and password a backslash, semicolon, comma, colon or double quote is written with a backslash in front, so a password such as a;b survives. Nothing else is changed: some older scanner apps take a network name made only of hex digits, such as CAFE1234, as hex bytes, and the page warns about that rather than add quotes that other phones would keep as part of the name. The exact text in the code is shown under Code holds.

WPA covers WPA, WPA2 and WPA3 personal networks — phones pick the version when they connect. Its password is 8 to 63 characters, or exactly 64 hex digits. A WEP key is 5 or 13 characters, or 10 or 26 hex digits; WEP is broken and the page says so. The network name is 1 to 32 bytes of UTF-8. Anything outside those rules is refused with the rule, since a phone could not join. Enterprise networks that ask for a user name as well (802.1X, EAP) are not supported. The code itself is built by Kazuhiko Arase's QR Code Generator 2.0.4, MIT licensed and copied into this page, at error correction M, with the standard four-module quiet zone.

Anyone who can see the code can read the password from it — it is the same as writing the password down, which is the point for guests. Print puts the code, the name and the password on one page. Nothing is uploaded: there is no server in this file, and neither the name nor the password is stored or sent anywhere.

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