Guest Wi-Fi QR — Delivery workflow

Worked example

Treat the file as a printed password: store it restricted, rename it with a version, rotate it, and never post the image publicly.

A Wi-Fi code is the only kind of QR where the file itself is a credential, so delivery is about naming, storage and replacement as much as printing. Chatcument saves it as chatcument-qr plus the extension; rename it at once to something like guest-wifi_cafe-main_v04.png and keep the password out of the file name.

Imagine a cafe that changes its guest password every month. The manager keeps one master file in a restricted folder, prints fresh table cards on the first of the month, and writes the version and date in small type in a corner of each card, never the password. When the network changes, the old cards are collected and thrown away, which is why a version number on the card is useful.

Choose the format by use. For a printed table card of 3 to 4 cm, give the printer an SVG or a 1440 px PNG; for a digital sign or the TV menu, 720 px PNG is enough. Laminate with a matte finish because gloss reflects the lamp and defeats scanning. Do not post the code on social media or a public page: anyone reading it learns the password, and the password then lives on in screenshots long after you change it.

Keep the credentials in a password manager, not in the same folder as the picture, and record in a short note which router, which network and which security type the code was built for. A colleague who inherits the job should be able to regenerate the code in two minutes: open the tool, choose Wi-Fi, enter the name, type, password and hidden flag, check the preview, and export.

Before handing over a batch, send the printer one proof and ask for a photo of it being scanned by a phone that has never joined. Only then approve the full print, and store that photo with the version number.

Guest network; example-only password

WIFI:T:WPA;S:Guest;P:example-only;;

The code is a printed password: use a guest network, rotate it, and never share the image beyond the place it is meant for.