# How to Make a Wi-Fi QR Code for Guests > A Wi-Fi QR code stores your network name, security type, and password so guests can join with a scan. Here's what goes inside, where to display it, and how to keep it safe. A Wi-Fi QR code is a small picture that stores your network name, security type, and password in a standard format. When a guest scans it with their phone camera, the phone offers to join your network automatically — no typing, no spelling out characters over the counter. Making one takes about a minute, and this article explains what goes inside the code, where to display it, and how to do it safely. ## What a Wi-Fi QR code actually contains Behind the pattern of squares sits a short line of plain text that QR readers recognise as Wi-Fi instructions. It looks like this: WIFI:T:WPA;S:MyNetwork;P:MyPassword;H:false;; Each field has a job: - **T** — the security type. `WPA` covers WPA2 and WPA3, which is what virtually every modern router uses. `WEP` exists for very old hardware, and `nopass` means an open network with no password. - **S** — the SSID, the network name phones see when they scan for Wi-Fi. - **P** — the password. - **H** — the hidden flag. `true` means the network doesn't broadcast its name; `false` means it does. A generator website or your router's settings page builds this string for you and encodes it as an image. The code stores nothing beyond those fields — no account details, no tracking. The flip side is that anyone who reads the code can read your password, because the text inside a QR code is not encrypted. That fact shapes most of the security advice below. ## How phones join when they scan Both iPhone and Android cameras have recognised Wi-Fi QR codes natively for years. The flow is the same on both: open the camera, point it at the code, and a notification appears offering to join the network. One tap and the phone connects. On some Android phones the camera hands the code to Google Lens or a built-in scanner, but the result is the same. After joining, the phone saves the network like any other. Your guest's device will reconnect automatically on their next visit, as long as the password hasn't changed. Two practical notes: the phone has to be within range of the network for the connection to succeed, and if your network is hidden, the phone will still offer to join — it simply connects by asking for the hidden name directly rather than waiting to hear it broadcast. ## How to make one You need three facts before you start: your network name exactly as it appears (capital letters count), your password, and your security type — WPA/WPA2 for almost everyone. Then: 1. Open a QR generator that supports Wi-Fi codes, such as the one on QRCodeMax.Vip, and choose the Wi-Fi option. 2. Enter the network name, password, and security type. Leave the "hidden" box unticked unless you know your network is hidden. 3. Check the preview by scanning it with your own phone before you commit to anything. 4. Download the image and print it, or keep it as a picture to share. Two shortcuts worth knowing. Many routers can display a QR code for the current network in their admin panel, so check there first. On Android, opening Settings, finding the saved network, and tapping "Share" shows a QR code you can photograph or screenshot. iPhone users can share a password over AirDrop, but for a printable sign, a generator is the straightforward route. ## Where to display it **At home**, put the code where guests actually sit: framed on a side table, stuck inside a cupboard door, or on the fridge. A laminated A5 print survives spills and gets reused for years. Guests stop asking, and you stop reciting a password letter by letter. **In a cafe or small business**, table tents and a sign near the counter both work. Print the network name in plain text under the code so people can connect manually if their camera struggles, and size the print for the distance — a code on a wall needs to be several centimetres across to scan from a chair. Test the printed version, not just the screen version, because cheap printers can blur the small squares. **In a rental property**, put a framed copy in the living area and mention it in the welcome book or house manual. Guests arriving tired care about one thing more than décor: getting online without messaging you. Include the network name in text as well, since some guests prefer typing it into a laptop. ## Special characters in names and passwords The Wi-Fi format uses colons, semicolons, commas, backslashes, and quotation marks as part of its structure, so if those characters appear in your network name or password, they must be "escaped" — preceded by a backslash — or the string breaks and the code joins nothing. Spaces, hyphens, and most ordinary punctuation are fine and need nothing special. The practical advice: don't build the string by hand. A decent generator escapes special characters for you, so you can type your password normally and trust the output. If you do it yourself, either avoid `: ; , \ "` in your password entirely or escape them correctly. Two more quirks worth knowing: SSIDs and passwords are case-sensitive, so "Homewifi" and "homewifi" are different networks; and emoji or unusual symbols in a network name can confuse some older devices, so stick to plain letters and numbers for anything guests will use. Whatever you choose, scan the finished code with a real phone before printing twenty copies. The scan is the test. ## Security: use a guest network, and rotate the password The single best habit is to never hand out your main network password. Nearly every router from the last decade supports a guest network: a separate Wi-Fi with its own password that isolates visitors from your own devices — your laptop, printer, network storage, smart TV — so a curious or compromised guest phone can't reach them. Enabling it takes a few minutes in your router's admin panel, usually under wireless settings, and gives you a name like `MyHouse-Guest` to point the QR code at. Then treat the password as semi-public, because that's what it is. Anyone who scans the sign can read it, and a sign in a cafe, a rental listing photo, or a forwarded message can travel far beyond your door. Reasonable practice: - For a home, change the guest password when a long-staying guest leaves, or every few months if the sign circulates. - For a cafe or rental, change it periodically and after any incident, and regenerate the QR code each time — an old code fails silently once the password changes. - Never rely on hiding your network name as protection; a hidden SSID is a minor inconvenience, not security. - Avoid open (`nopass`) networks for anything you control. Without a password, anyone nearby can connect, and unprotected traffic is much easier to interfere with. WPA2 or WPA3 with a guest network and a password you actually rotate covers the realistic risks for a home or small business. ## Common problems and quick fixes If a guest scans the code and nothing happens, the usual causes are simple. Out of range: the phone connects only within signal reach, so step closer to the router. A typo in the code: re-check the network name and password character by character, including capital letters. A changed password: if you updated the router but not the sign, the code joins nothing — regenerate it. And if the network is hidden, some older phones handle the join awkwardly; giving the network a visible name solves it. When all else fails, the plain-text network name and password printed under the code are the fallback, which is exactly why you put them there. ## Conclusion A Wi-Fi QR code is just your network name, security type, and password in a scannable picture — trivial to make, genuinely useful on a wall or table. Point it at a guest network rather than your main one, change the password whenever the sign travels widely, and regenerate the code after every change. That's the whole job.