Create WLAN QR code: Connect guests without password
Enter the network name and password, generate the code and place the print-ready guest card on the table. No typing, no copying, no “what was the password?” Free and without registration.
QR library: qrcode generator (MIT, Kazuhiko Arase), integrated locally. Format: WIFI standard.
Used only locally in the browser – not stored, not transferred.
A6 (105 × 148 mm) fits into standard table stands and frames 10 × 15 cm. The PNG has 1240 × 1748 px and therefore 300 dpi for printing companies. The SVG only contains the code.
Scan and connect – hold the camera app on the code, no password required.
Guest WiFi · Access for visitors only
Preview of the A6 guest card – it is printed exactly like this.
Guest WiFi in three steps
SSID and password of the guest network. Important: the guest network, not the company network - the code is readable by everyone.
Network name on map shows what guests see in settings. Bug fix Q for printed, frequently touched cards.
Print A6 or send the 300 dpi PNG to the printer. Test with iPhone and Android from the planned distance.
What's in the code? The WIFI format
WLAN QR codes are not a special case of QR technology: the code contains a text line after the WIFI:-Scheme that iOS and Android understand inherently. Anyone who can read them will also understand why errors occur.
WIFI:T:WPA;S:Cafe-Muster-Gast;P:geheim123;H:true;;Encryption. WPA stands for WPA, WPA2 and WPA3 - the format does not differentiate them. Alternatives: WEP and nopass.
SSID, i.e. the network name. Special characters must be escaped (see below).
The password in plain text. It is not encrypted, just masked - any scanner can view it.
True marks a hidden network. Without this value, some devices will not find access.
Special characters in the password or network name must be escaped with a backslash – \ ; , : " These are the critical cases. mein;passwort is entered in the code mein\;passwort. This tool does that automatically; If you build code yourself, this is the most common source of errors.
WPA2, WPA3 or open network?
The normal case for guest networks. In both cases, the QR code says T:WPA - this is correct and not an inaccuracy in the format.
Without password: T:nopass. Convenient, but everyone within reach is online. Only makes sense with client isolation and bandwidth limits.
Only for old devices. WEP is considered broken and should not protect a guest network.
WPA3 has a peculiarity that many instructions conceal: for the QR code there is no value of its own. T:WPA If an older device fails, it is usually due to WPA3-only – then offer a second guest network with WPA2 or drive WPA3 in transition mode.
Where the guest card works
On every table or at the entrance. Guests get online faster and stay longer - and the waitress no longer has to read out a password.
Place it in the room instead of writing the password on a card. If you change your password, simply reprint it.
In the waiting area: Patients and clients connect without asking the receptionist.
Customers are waiting anyway - the code makes the waiting time productive.
One code per location, printed uniformly. Centrally maintained, locally designed.
Day guests do not need access via email. Card is enough, password rotates regularly.
For gastro websites with menu, reservation and Google profile: Website for restaurants. For rooms, direct booking and seasonal content: Website for hotels.
Security: disconnect the guest network
A QR code is convenient, but it is not a secret: whoever scans it can read the password, and whoever takes a photo of it passes it on. This is exactly why the guest network needs to be separated from the company network.
- • Own VLAN or SSID for guests, without a route to NAS, Kassa, printers and servers.
- • Client isolation, so that guests don't see each other.
- • Bandwidth limit per device, so that an upload does not brake the checkout.
- • Password change at fixed intervals – and then reprint the card (done here in one minute).
- • No company password in the guest code, not even “only short”.
If the guest network is more than one access point – multiple locations, VLANs, captive portal, logging – it becomes infrastructure work. DevOps & Infrastructure, IT consulting.
If the code does not work
Without H:true in the code, the network does not appear in the list. Some Android versions still don't connect - then make the SSID visible.
Unescaped semicolons or colons break the code into incorrect fields. This tool automatically masks.
Older devices do not see the network. A 2.4 GHz network in parallel solves it - or provide guests with newer devices.
An upstream registration portal appears after the scan. The QR code only connects you, it doesn't register you - that has to be on the card.
Use the camera app instead of the QR app, capture the entire code in the image, distance approximately 10 × edge length.
Below 2 × 2 cm it becomes unreliable on paper. A6 with 52mm code is plenty.
Questions about the WiFi QR code
Enter the network name and password above, select encryption and print the card. The code contains the access data in the WIFI standard format that iPhone and Android understand without an app. Everything runs in the browser, the data is not transferred.
Yes. iOS has read WLAN codes with the camera app since iOS 11, Android from version 10 also without an additional app. For older Android devices or if the camera doesn't recognize, a QR app can help. A large, high-contrast print is important.
No, it is readable. The code contains the password in plain text (masked only), any scanner app can display it. Therefore, treat the card like a notice: your own guest network, no access to company systems, regular password changes and a new card afterwards.
Yes – the “Network is hidden” option sets H:true in the code. Some Android versions still do not connect reliably; if guests have problems, a visible guest network is a more robust solution.
There is no separate value for this in the WIFI format: both are in the code as T:WPA. The device takes over the negotiation. If an older device fails in a WPA3-only network, a second network with WPA2 or the WPA3 transition mode can help.
Most of the time, special characters are not masked in the password, the network is 5 GHz-only, the SSID is hidden or a captive portal is waiting after the connection. A typo in the SSID is also common - the network name must be exactly correct, including upper and lower case.
Yes. The template is A6 (105 × 148 mm) and fits into standard table stands and frames 10 × 15 cm. For long-lasting cards, select error correction Q or H, print matt and test with two smartphones before printing. The PNG is 300 dpi.
Proven in the catering and hotel industry: every three to six months, immediately if misused. Then reprint the card - with this tool this takes a minute. If you change frequently, you only reprint the menu, not the menu.
For a company, yes. A guest network in your own VLAN without a route to servers, cash registers and printers prevents a foreign device from ending up in the company network. With client isolation, guests also won't see each other.
No, a code belongs to exactly one network. There is a separate map for each branch - but with a uniform layout. If guests are supposed to use the same password in all houses, this is a security risk: a leak will then apply everywhere.
No. The QR library runs locally in your browser; SSID and password do not leave the device and are not saved. Only the usual server logs are generated when the page is accessed, without your input.
Yes, it works the same way. At home, a printout on the fridge or a code for visitors is often enough. The same applies here: The code contains the password, so do not post it publicly.
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