Wi-Fi QR Code

How Wi-Fi QR Code works

Create a QR code that joins a Wi-Fi network without typing the password. The code encodes the SSID and password in the standard WIFI: format phones understand. Everything happens inside this page: the tool reads your input, runs the calculation or conversion locally, and hands the result back to you. Nothing is transmitted, because there is no backend to transmit it to.

That design choice is deliberate. Most free tool sites upload your files to a server, process them there, and quietly keep a copy. Toolcin cannot do that — the site is a set of static files. If your connection dropped the moment the page finished loading, every tool would still work.

The payload format

A Wi-Fi QR code is a plain text string the phone parses: WIFI:T:WPA;S:network-name;P:password;; — T is the security type, S the SSID and P the password. The trailing double semicolon ends the record.

Because it is just text, the QR is static: no server, no expiry, and it works with no internet connection at all. The guest's phone joins the network before it has data.

What breaks it

Special characters in the SSID or password must be escaped with a backslash — a semicolon in a password will end the field early and the join will fail. Non-ASCII network names sometimes fail depending on the phone's parser.

Open networks use T:nopass and omit the password field; using WPA with an empty password produces a code that asks for a password that does not exist.

Printing it

Print at least 3 cm wide for a code read at arm's length, keep the quiet zone clear, and put it where a guest is already looking — the table card rather than the back of the router.

Good to know

• Works offline once loaded, including on flights and in locked-down networks.
• No file size limit beyond your device's own memory.
• Free to use, with no account and no usage counter.
• Results are produced locally, so they are not logged or shared with anyone.

Questions