How to Make a Wi-Fi QR Code Guests Can Scan to Connect
Spelling out a long Wi-Fi password to every guest gets old fast. A Wi-Fi QR code fixes that: the guest points their camera at it, taps “Join”, and they are online.
This guide covers what goes into the code, how to get each field right the first time, where to place it, and the one security decision you should make before printing it.
What a Wi-Fi QR code actually contains
A Wi-Fi code is a short line of text in a standard format that phone cameras understand: WIFI:T:WPA;S:CafeGuest;P:welcome2026;; — the security type, the network name and the password.
There is no link and no server involved. The phone reads the details from the code itself and offers to join the network. That also means the code works without an internet connection and keeps working until you change the password.
Step by step
- Open the Wi-Fi QR code generator and type the network name (SSID) exactly as your phone shows it in the Wi-Fi list, including capital letters and spaces.
- Type the password and use the show button to check it character by character. A single wrong letter means guests cannot join, usually without a helpful error.
- Choose the security type. WPA covers WPA, WPA2 and most WPA3 routers. Choose “No password” only for open networks.
- Tick “Hidden network” only if your router does not broadcast its name.
- Check the scan score under the preview, then download PNG for screens or SVG for print.
- Before printing, scan it with your own phone while you are disconnected from that network. If it joins, it is ready.
Which phones can scan it?
iPhones on iOS 11 or later and most Android phones on Android 10 or later read Wi-Fi codes straight from the camera app. The phone shows a “Join network” prompt and nothing happens until the guest taps it.
On older Android phones, Google Lens or the “Scan QR code” icon in Wi-Fi settings (next to “Add network”) does the same job. It is worth printing a small line such as “Open your camera and point it here” under the code.
Use a guest network
The password sits inside the code as plain text. Anyone who scans the code, or simply photographs it, can read it with a scanner app. So the real question is not “can people see my password?” but “which network am I happy to give out?”.
Most routers can create a separate guest network in a few minutes from their settings page or app. Guests get internet access but cannot see your billing computer, CCTV recorder or printers. Put the guest network in the code, never the main one.
Where to put it and how big
| Place | Suggested size | Tip |
|---|---|---|
| Café or restaurant table | 6–8 cm | Table tent next to the menu code, clearly labelled “Wi-Fi” |
| Hotel room or homestay | 6–8 cm | Frame it near the desk or in the welcome folder |
| Office reception | 8–10 cm | At eye level on the counter or wall |
| Event venue | 15–20 cm | Near the entrance and the seating area |
When guests cannot connect
- The password changed: the old code still holds the old password. Make and print a new code.
- The network name has different capitals or a trailing space: copy it exactly from a phone’s Wi-Fi list.
- The router is set to WPA3-only and the guest’s phone is older: allow WPA2/WPA3 mixed mode on the guest network.
- Office networks that ask for a username (WPA-Enterprise) cannot be joined with a standard Wi-Fi QR code.
- The code is too small or glossy: see the print size guide and use a matte finish.