Use the guest network for public codes
Anyone who can see the printed code can extract the password — that's the point. So the code should join a guest or customer network, isolated from your business systems, tills and cameras. Every router made in the last decade can run a separate guest SSID; setting one up is a ten-minute job that makes public codes safe by construction.
At home, the same logic applies to a lesser degree: a code in the kitchen is fine; a code visible through the window is not.
When you change the password
The password lives inside the pattern, so rotating it means printing a new code. If you rotate often, keep the code as a replaceable insert — a printed card in a frame — rather than a permanent fixture. Some venues rotate the guest password monthly and treat the reprint as part of the routine.
The classic failure: the wrong SSID
When a Wi-Fi code 'doesn't work', nine times out of ten the SSID in the code doesn't byte-for-byte match the network — trailing spaces and case are the usual culprits. Test the code after forgetting the network, because a phone that already knows the network will join it regardless and hide your mistake.
Mistakes to avoid
- Never display the main network's code publicly — guest network only.
- Copy the SSID exactly; case and spaces are significant.
- Test with a phone that has forgotten the network, or you're testing nothing.
Common questions
Can someone steal my password from the code?
Anyone who can scan the printed code can read the password — that's by design. Display it only where you intend people to join, and use a guest network.
Is my password uploaded to generate the code?
No. Everything happens in your browser; the password never leaves your device.
Does it work on iPhone and Android?
Yes — both read the standard Wi-Fi format natively and offer to join.
What about hidden networks?
The format supports a hidden flag, but joining hidden networks via code is unreliable across phones — broadcasting the guest SSID is the dependable route.