Guest Wi-Fi QR Codes: Setup and Placement
A guest code is part of the welcome, not an afterthought. A sticker on a router in a back room helps nobody. A code placed where guests actually arrive, on a network that is separate from your own devices, makes the visit easier without putting your main network on display.
The Wi-Fi QR Generator makes the code in the browser from the guest network’s name and password. The setup around it matters as much as the code itself.
Quick answer
Give guests their own SSID, isolated from the devices you rely on, with its own password. Generate a code for that network, test it with a phone that has never joined, and place copies where guests arrive and in each room. Change the guest password when the group changes, then reprint the code, because the old one stops working.
Build the guest network first
Use the router’s guest-network feature if it has one. A guest network should have its own name and password, and it should not allow clients to reach your computers, storage or smart-home equipment. Client isolation is useful too: it stops one guest device from seeing another. If the router supports a bandwidth limit, set one so a single device cannot saturate the connection.
Choose WPA2 or WPA3 rather than an open network. An open guest SSID invites anyone in range, and it gives you no password to rotate. The code is convenient enough without removing the lock.
Generate and test the code
Enter the guest SSID exactly, including case and spaces. Select the correct security type, enter the password, and mark the network hidden only if it is actually hidden. Generate the code and scan it with a device that has never joined the guest network. Confirm the phone offers the right network name, not a similar one from a neighbour.
If the network uses special characters in its password, check the decoded string rather than assuming. A mismatched semicolon or quote can make the code fail on some phones while working on others.
Placement that works
Put the code where the guest is standing when they need it: a reception desk, a welcome folder, a bedside table, a table card in a cafe. Print it at a readable size, keep a clear margin, and use dark ink on a light surface. Laminate or frame cards that will be handled often.
Do not place the code where it can be photographed from outside, such as a street-facing window or a door visible from the pavement. If the guest network is meant to be temporary, keep the code inside the room rather than in a public corridor.
Keep it current
A printed code has no expiry date. It keeps working until the password changes, and then every copy becomes useless at once. Decide how often the guest password should change, and keep a list of where the current code is displayed. When you change the password, generate a new code and remove the old cards rather than leaving both on the wall.
Also revisit the code after replacing a router or changing the network name. The old code may still be readable but point at a network that no longer exists.
Open the Wi-Fi QR Generator, enter the guest network details and test the result before printing. For the wider guide, read How a Wi-Fi QR Code Works Without Exposing the Password. For the general sharing method, see How to Share Wi-Fi Without Typing the Password.
Common questions
Should guests use my main Wi-Fi network?
It is safer to give them a separate guest network with its own password and no access to your computers, storage or smart-home devices. Client isolation also stops guest devices from seeing each other. The code then shares only the guest credentials.
Where should I put a guest Wi-Fi QR code?
Put copies where guests arrive and where they will use the network: a reception desk, a welcome folder, a bedside table or a table card. Keep the code out of sight from the street, and print it large enough to scan without effort.
What happens to the QR code when I change the guest password?
The old code keeps decoding but no longer joins the network, so every printed copy becomes useless. Generate a new code for the new password, replace the displayed copies, and remove the old cards rather than leaving both available.