How to Create a Wi-Fi QR Code for an Office, Café or Salon

What a Wi-Fi QR code actually is

A Wi-Fi QR code is not a link. It encodes the network credentials themselves — the network name, the security type and the password — in a format phones recognise as a connection offer rather than a web address.

That has two consequences worth being clear about before you print one. It works entirely offline, with no service in the loop, which is exactly what you want for connecting people to a network. And the password is inside the pattern, so anyone who photographs the card has it — the code is the credential, not a pointer to it.

Get the network details exactly right

Nearly every Wi-Fi code that fails does so because a detail was retyped rather than copied. There is no forgiving layer here; the phone attempts precisely what the code says.

• The network name, copied exactly. It is case-sensitive, and trailing spaces are real and invisible.
• The security type — WPA2 or WPA3 for a modern network, and these are not interchangeable. Picking the wrong one produces a code that scans and then fails to join, which is the hardest failure to diagnose.
• The password, case-sensitive, copied rather than transcribed. Confusing l/I/1 and O/0 by eye is the most common single error.
• Whether the network is genuinely hidden. Mark it hidden only if the SSID really is not broadcast — setting it wrongly breaks joining on some devices.

Never point it at your internal network

A Wi-Fi code on a wall is a published password. Treat the decision as you would treat writing the password on the window in marker, because functionally that is what it is.

Put guests on a separate guest network, not the one your point-of-sale, office machines and cameras are on. Enable client isolation so devices on the guest network cannot see each other — a café network without it lets any guest browse any other guest’s device. Give the guest network its own password, and change it on a schedule you can live with.

This is ordinary practice rather than paranoia: the convenience of the code is precisely that it removes the friction that was previously limiting who joined.

It is static, and that has consequences

Because the credentials live in the pattern, a Wi-Fi QR code cannot be edited. Change the password and every printed card is instantly wrong — there is no dashboard setting to update.

There is also no analytics. Nothing you control is contacted when someone joins, so scan counts do not exist for this type of code. That is a direct consequence of it working offline, not a missing feature.

If you rotate the guest password often, plan for it: print the cards cheaply and in small batches, or point a dynamic code at a small page that displays the current password instead. The second approach gives you editability and scan data at the cost of requiring the guest to already have a connection — which is fine on mobile data and useless in a basement.

Test on both platforms before printing a hundred

iOS and Android handle Wi-Fi codes slightly differently, and a code that works on one is not proof of the other.

Test with a device that has never joined the network — your own phone remembers it and will appear to succeed regardless of whether the code is correct. Forget the network first, or borrow a phone. Then check that the prompt names the network you expect, that joining actually completes, and that the connection then reaches the internet rather than just associating.

Design the card, not just the code

The code alone leaves people guessing. A card that works says what it is for, and gives a fallback.

Name the network in readable text next to the code, and print the password too. Some guests will use an older device that does not offer Wi-Fi codes at all, and a card that leaves them stuck has failed at its only job. Add a short instruction — “point your camera at the code to join” — because a surprising number of people do not know their camera does this.

Place it where someone sits rather than where it decorates: on the table, at the counter, by the seating. And keep it out of direct glare, since a laminated card under a spotlight is the classic unscannable object.