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Quick answer
A Wi-Fi QR code holds the network name, the security type and the password. Point a camera at it and the phone offers to join; one tap and you are on. Nothing to type, nothing to ask at the counter. Generate it from the Wi-Fi tab of the QRWave generator, download the high-resolution PNG and print it.
Why it helps
The Wi-Fi password is one of the last strings we still read out loud, usually getting it wrong. Anyone running a café, a guesthouse, a studio or a waiting room repeats it dozens of times a day — and good passwords are long precisely so they cannot be guessed. The QR removes the step: print once, stick it on the wall, done.
There is a less obvious side effect. Once the password is easy to hand out, it no longer has to be short and memorable. You can use a long random one — an actual password — without making anyone's life harder.
Step by step
- Open the generator and pick the Wi-Fi tab.
- Type the network name (SSID) exactly as it appears in the network list: capitals, dashes and spaces all count.
- Choose the security type.
WPAcovers WPA, WPA2 and WPA3.WEPis for very old routers only.Noneis for open networks. - Enter the password. Special characters are handled automatically — leave them as they are.
- If the network does not broadcast its name, tick Hidden network.
- Download the 1024 px PNG and print it, or take the SVG if you need to blow it up on a panel.
What the QR actually contains
It is not a link. It is a text string in a format the operating system recognises:
WIFI:T:WPA;S:Office-Guest;P:sunset-42-violet;;| Field | Meaning |
|---|---|
T | Security type: WPA, WEP or nopass |
S | Network name (SSID) |
P | Password, omitted on open networks |
H | true only when the network is hidden |
The characters \, ;, ,, : and " inside the name or password must be preceded by a backslash, and a value made only of hexadecimal characters has to be wrapped in quotes or the reader treats it as raw bytes. QRWave applies both rules for you.
Where to put it
| Place | How to place it |
|---|---|
| Cafés and restaurants | On the table next to the menu QR, not behind the counter |
| Guesthouses and short lets | In the welcome frame and in the house guide |
| Offices | Meeting room and reception, on a separate guest network |
| Waiting rooms | On the coffee table, postcard size |
| Events and coworking | On the badge or on the entrance stand |
Security: read this before printing
The password sits inside the QR in clear text. Anyone who photographs the card takes it home and can read it back months later. That is not a flaw in the format — it is the format.
The practical consequence is simple. Print the QR for the guest network, not for the one carrying your NAS, your printers and your work machines. Almost every router can turn on an isolated guest network in two clicks, and this is the right moment to do it. Without one, a QR on the wall is a standing invitation to your internal network.
It cuts the other way too: since handing out the password now costs nothing, rotating it costs only one reprint.
Mistakes to avoid
| Mistake | Why it hurts |
|---|---|
| Typing the SSID from memory | One wrong capital and the phone looks for a network that does not exist |
| Forgetting the "hidden network" tick | On a hidden network, without H:true the connection never starts |
| Printing the main network | You are handing out access to the network your devices live on |
| Printing it too small | A long password makes a denser QR: below 2×2 cm it stops scanning |
| Posting a photo of it | That is your password, published in a shape that looks harmless |
FAQ
Does the Wi-Fi QR work on iPhone and Android?
Yes. iOS 11 and later and Android 10 and later read it with the system camera, no app needed. Older Android versions need a QR reader that supports the network format.
Can whoever scans the QR see the password?
Yes. The QR carries the password in clear text and anyone who photographs it can extract it. That is why you should print the guest network, not the main one.
If I change the password do I have to redo the QR?
Yes. The QR contains the password itself, not a reference to it: change it and every printed QR stops working and has to be reprinted.
Does it work without an internet connection?
Yes. The QR is not a link, it is text the phone reads locally. You only need to be in range of the network.
Can I use it for a hidden network?
Yes, by ticking "Hidden network". Without that tick the phone only searches among networks that broadcast their name and will not find yours.