What a WiFi QR code actually contains
A WiFi QR code is an image that encodes three pieces of information: the network name (SSID), the password, and the type of security in use (WPA2, WEP or none). Nothing else. No customer data is collected when the code is scanned.
When a smartphone reads the code, it automatically recognises the format and offers to join the network. The guest taps "Join" and connects without typing a single character.
That is what sets it apart from a standard QR code, which opens a website. This one goes nowhere online: its only job is to connect a device to a wifi network. So it works even before the guest has any connection at all.
How to generate a free WiFi QR code
There are three routes, depending on what you have to hand. Each takes about five minutes and costs nothing.
From a computer, using an online generator
This is the easiest option for professional use, because you end up with a high-resolution file ready to print. A wifi code generator asks for three fields and produces the image straight away.
- The network name, written exactly as it appears, capital letters included.
- The network password.
- The security protocol: WPA/WPA2 in almost every case.
All that is left is to download the PNG or the PDF. Check the capitalisation before printing: "Bistro_Wifi" and "bistro_wifi" are two different networks as far as a phone is concerned. If you are producing other visuals for the dining room, the logic is the same as the one covered in our guide on how to create a QR code.
Creating and sharing a WiFi QR code on iPhone
iPhones have offered direct sharing since iOS 11, but it does not involve a code: hold two already-paired Apple devices close together and a prompt offers to pass the password across. Handy between friends, useless in a dining room.
To get an actual image you can display, open the Shortcuts app and use a QR code generation action, or use an online generator in Safari. Since iOS 16 you can also recover a forgotten password under Settings, Wi-Fi, the network's information button, Password field.
On Android, Freebox or Orange
Android does this better: go to Settings, Network and internet, select the active network, then tap "Share". The phone instantly displays a QR code ready to be photographed. Freebox and Orange routers often already print a code of this kind underneath the unit or show one in their admin interface.
How to scan a WiFi QR code
No app to install on recent phones. That is what makes the method reliable with guests.
iPhone
Open the camera, frame the code, wait for the banner at the top of the screen and tap it. The Control Centre also includes a dedicated code reader.
Android
Same gesture with the camera, or through Google Lens. On some older entry-level models you will need to download a free scanning app.
Scanning a WiFi QR code on a computer
A laptop has no built-in reader. Two options: a webcam paired with a scanning utility, or an online decoder where you upload the image to read its contents in plain text. That comes in handy when you have lost the password and only have the printed visual left.
Security: WPA2, WEP and guest networks
A WiFi QR code does not weaken your network, but it does make the password readable by anyone who decodes the image. Best practice comes down to one rule: this code must never point to the network running your till and your kitchen printer.
- Set up a separate guest network on your router, with its own password.
- Choose WPA2 or WPA3. WEP has been broken for years, stop using it.
- Change the guest password once or twice a year and reprint the code.
If your network is hidden, the code still works: any serious generator offers a "hidden network" checkbox that adds this detail to the encoded content.
One table tent for both the WiFi and the menu
The real gain is not technical, it is logistical. The tent card sitting on the table can carry two codes: the menu on the left, the WiFi on the right. The guest sits down, scans, browses, orders.
Plenty of restaurateurs who digitise their menu add the WiFi at the same time, because the printing is shared. If that is where you are, the production logic is identical to a stand for a create a QR code menu: one visual, one short caption, a format that survives spilt drinks.
Tell the two codes apart visually with an icon and a word, otherwise guests will scan the wrong one and land on the menu when they were after the password.
What changes on the floor
| Criterion | Password read out or displayed | WiFi QR code |
|---|---|---|
| Time per table | 30 to 60 seconds of server time | No involvement at all |
| Typing errors | Common with long passwords | None, everything is encoded |
| Foreign guests | Spelling it out is awkward | A universal gesture |
| Password change | Retrain the whole team | Reprint the table tent |
On a service of 40 covers, around ten tables ask for the WiFi. That adds up to nearly ten minutes of server time per service, reclaimed for almost nothing.
Those minutes have a measurable value, just like the other levers described in our method for raising restaurant prices with a calendar method.
The mistakes that make a scan fail
When a code does not work, the cause is nearly always physical. Start with these checks before redesigning the visual.
A code printed at less than 2.5 cm across becomes unreadable for a phone held 20 cm away. An overly glossy laminate bounces the spotlights back and washes out the contrast. A code placed on a dark coloured background loses its legibility.
Always test with two phones, one iPhone and one Android, before printing fifty table tents. The test takes two minutes and saves you a full reprint.