A Complete Guide to Turning Your Home Wi-Fi into a QR Code - Guests Connect with One Tap

The Days of Telling People Your Wi-FiPassword Out Loud Are Over

There are surprisingly many occasions when you need to tell guests your Wi-Fi password. Friends visiting, relatives coming home for the holidays, home parties, coworkers working from your home. Each time, reading out a long password or writing it on a note to hand over takes effort. Especially if you have set a random password of 16 characters or more with security in mind, conveying it verbally is nearly impossible.

With a QR code, you can solve this problem in an instant. The Wi-Fi connection information (SSID, password, encryption type) is stored in a single QR code, and guests are connected automatically just by scanning it with their smartphone camera. There is no need to even show them the password. Both iPhone (iOS 11 or later) and Android (10 or later) can recognize a Wi-Fi QR code and connect with the standard camera app.

How to Make a Wi-Fi QR Code - Done in 3 Steps

Only 3 pieces of information are needed to create a Wi-Fi QR code. The SSID (network name), the password, and the encryption type (WPA/WPA2/WPA3). These are listed on the router's admin screen or on the label on the router itself. On an iPhone, you can check the SSID by going to "Settings," then "Wi-Fi," then the (i) icon next to the name of the connected network. On iOS 16 or later, the password can be displayed on the same screen.

Once you have the information, all you need to do is select the Wi-Fi type in a QR code generator (such as Qraft) and enter the SSID and password. Internally, text in the format WIFI:T:WPA;S:YourSSID;P:YourPassword;; is converted into a QR code. Since almost all home routers today use WPA2 or WPA3 for encryption, selecting WPA is fine.

Download the generated QR code as a PNG or SVG, print it, and put it up in the living room or entrance. Some households put it in a stylish frame and make it part of the interior decor. If you laminate it, it becomes resistant to water, so you can also place it in the kitchen or washroom.

Security Precautions - The Password Is in Plain Sight

The most important thing to understand about Wi-Fi QR codes is the fact that the password stored in the QR code is not encrypted. Anyone who scans the QR code can read the password in plain text. Putting it up in your own living room is not a problem, but if you post a photo of the QR code on SNS, your password will be exposed to the whole world.

As a countermeasure, setting up a guest network for visitors is strongly recommended. Many routers (Buffalo, NEC, TP-Link, and others) have a guest network feature. Create a guest SSID separated from the main network, and turn only that password into a QR code. Because the guest network cannot access the NAS or printers on the main network, security is maintained.

If you change the password, you need to regenerate and reprint the QR code. A dynamic QR code cannot be used in this situation. This is because the Wi-Fi connection information has to be stored directly in the QR code and cannot be handled with a redirect. If you change your password often, also consider displaying the QR code on a tablet.

Differences in the Connection Steps on iPhone and Android

On an iPhone (iOS 11 or later), just launching the standard camera app and holding it over the QR code displays a Wi-Fi connection notification banner at the top of the screen. Tapping the banner completes the connection automatically. A distinctive feature is that no password entry screen appears and you can connect with one tap. However, there are reports of connections failing on some WPA3 networks with iOS 15 and earlier.

On Android, the behavior differs depending on the model and version. The standard camera app on Android 10 and later recognizes Wi-Fi QR codes, but some manufacturers (Samsung, Xiaomi, and others) build their own QR reader into the camera app, and the behavior differs slightly. Scanning through Google Lens is the most reliable. On Android 9 and earlier, the standard camera does not recognize QR codes, so you need the Google Lens app or a third-party scanner app.

Print It and Display It - How to Make a Stylish Wi-Fi QR Code

If you are going to print a QR code anyway, you will want a design that fits in with your interior. A popular style is to add text such as "Wi-Fi" or "Scan to Connect" above the QR code, put it in a photo frame, and place it on a side table in the living room. With design tools such as Canva or Figma, you can create a card with a background color and a frame added.

The point to watch when designing is not to impair the scanning accuracy of the QR code. Keep a margin of at least 4 modules (the quiet zone) around the QR code, and for the code's color, use a contrast ratio of 4:1 or higher against the background as the lower guideline. For printing, allowing extra room up to about 7:1 to account for the drop in density makes scanning stable. Black and white is the most reliable, but combinations of navy or dark green modules on a white background can also be scanned without problems. Pastel-colored modules risk failing to scan due to insufficient contrast.

A print size of at least 3 cm per side is recommended. Assuming guests hold their smartphones at a distance of 20-30 cm, 3 cm is enough to ensure sufficient reading accuracy. Glossy paper reflects the camera flash, so choose matte paper or lamination (matte finish).