How to Make a WiFi QR Code (Step-by-Step Guide 2026)

Every cafe, restaurant, hotel and Airbnb has the same problem: guests want the WiFi password, and typing a 12-character mixed-case password on a phone keyboard is a small but constant friction. A WiFi QR code solves it. The guest points their camera at the code, taps the popup, and is connected. No typing. No mistaken password. No sticky note with "the password is coffee123!" on the counter.

Making one is quick, but there are a few specific things you have to get right or the QR code will fail on half the devices. This guide covers the entire process.

How a WiFi QR code actually works

A WiFi QR code is not a link. It is a small text string with a specific format, encoded as a QR code. When a phone camera sees the code, it recognises the format and offers to join the network.

The two semicolons at the end are required. Forget them and some scanners will fail.

How to make a WiFi QR code in 30 seconds

1. Open the QR Code Generator tool.
2. Choose "WiFi" as the type.
3. Enter the network name exactly as it appears on your router (case-sensitive).
4. Enter the password (case-sensitive).
5. Choose the security type. WPA for modern routers, WEP for very old ones, nopass if the network is open.
6. Download the QR code as PNG or SVG.

If you are printing it for a cafe or hotel, use SVG. It scales to any size without blurring. A PNG blown up to poster size will be fuzzy and many phones will not scan it.

Six mistakes that break WiFi QR codes

• Forgetting the closing semicolons. The format ends with ";;" (two of them). One or none will fail on Android.
• Wrong security type. If you pick WPA and the network is WPA3, some older phones will fail. If you pick WEP and the network is WPA, most modern devices will refuse to connect.
• Spaces in the SSID. Network names with leading or trailing spaces break the QR format unless the spaces are preserved. If your SSID has spaces, test carefully.
• Special characters in the password. Characters like ; : , " and \ need to be escaped in the QR format with a backslash. Good QR generators do this automatically. Verify by scanning before you print.
• SSID hidden flag wrong. If the network is hidden, H must be "true". If it is not hidden and you set H to true, most phones will fail to connect.
• Printing too small. The QR code should be at least 3 x 3 cm (about 1.2 inches) for a phone to scan reliably. Smaller codes work if the camera is very close and the printing is very sharp, but 3 cm is the safe minimum.

How to test before you print 500 of them

Never print a WiFi QR code without testing it on both an iPhone and an Android phone. The two platforms handle the format slightly differently, and a mistake in the format string may work on one and fail on the other.

1. Generate the QR code.
2. Open the Camera app on an iPhone and point it at the code.
3. A popup should appear offering to join the network. Tap it. Do not just verify the popup appears.
4. Repeat with an Android phone (use the built-in scanner or Google Lens).
5. If both work, print with confidence.

Displaying the QR code beautifully

A QR code on a piece of printer paper taped to the counter looks unfinished. A few small things make it look intentional:

Also: put the network name in text below the QR code. If a guest's phone cannot scan (very old device, broken camera) they can at least read the name and connect manually.

Custom colours

Most QR generators let you set foreground and background colours. Two rules:

• Keep the contrast high. Dark foreground on a light background works. Light on dark works. Both being medium-brightness does not.
• Do not use blue or green as the foreground if you want maximum compatibility. Some older scanners prefer black. Black foreground on white is the most reliable choice.

Is a WiFi QR code safe?

The QR code contains the network password in plain text. Anyone who scans it can read the password from the QR string. They do not need to actually join the network to see it. If you print the code and stick it on the wall, you have effectively published your WiFi password.

For a guest network, this is fine. The whole point is to let guests in. For your main home network, this is a problem if you do not want neighbours joining.

The solution: create a separate guest network on your router (every modern router supports this), with its own password, and put the QR code for that network on your wall. The guest network is often rate-limited and isolated from the main LAN, which is good for security.

The bottom line

A WiFi QR code is one of those small quality-of-life improvements that guests notice immediately. It takes 30 seconds to make, costs nothing, and eliminates a small friction that everyone experiences but nobody complains about.

Test on both iPhone and Android before printing. Use SVG if you are printing at any size larger than a business card. And put your guests on a separate network. Nobody needs the code to your main router taped to the wall.