QR Code for WiFi: Share Your Network in One Scan

You know the moment: a guest walks into your café, your office, your home — and asks for the WiFi password. You read it out, they mistype it, you spell it again. A WiFi QR code kills this loop in one scan.

Modern phones (iOS 11+ and Android 10+) recognize a WiFi QR natively from the camera app. Tap the notification, the device joins automatically. No password typed, no password leaked verbally to the next room.

Here's how to create one and where to put it.

What goes inside a WiFi QR code

The standard format is a single string with three parts:

WIFI:T:<security>;S:<ssid>;P:<password>;;

T: — security type. WPA for WPA/WPA2/WPA3, WEP for older networks, nopass for open networks
S: — the network name (SSID), exactly as it appears in your router
P: — the password (omit for open networks)

Special characters in the SSID or password — \, ;, ,, :, " — must be escaped with a backslash. A good generator handles this automatically.

Step-by-step with Qropi

Open Qropi and pick the WiFi tab.
Type the SSID (network name) exactly as it appears on your router or phone.
Type the password. Watch for trailing spaces.
Pick the security type — almost always WPA unless you know otherwise.
Test the QR with your own phone before printing it. If it doesn't connect, the most likely culprit is a typo in SSID or password — not the QR itself.

That's the whole flow. The code generates client-side; nothing is sent to a server.

Where to put a WiFi QR (and where not to)

Good places:

A laminated card on the dining table or check-in counter
A sticker on the back of a meeting room display
A printed insert in your Airbnb welcome book
A poster near your gym's reception

Bad places:

In an email or chat message — defeats the point. Just send the password as text.
Anywhere the public can photograph it from outside (e.g., a window-facing sign for a private network)
On a code that's too small to scan from a sitting distance

Should you use a guest network?

Yes — almost always. Most modern routers let you broadcast a separate guest SSID isolated from your internal network. Generate the QR for the guest network, not your main one. This way:

Visitors can't reach your printers, NAS, or smart home devices
A leaked guest password doesn't compromise your home or office
You can rotate the guest password periodically without disrupting your own devices

Most routers expose this under Wireless → Guest Network in the admin panel.

What about hidden SSIDs?

If your network is hidden (broadcast disabled), some phones won't auto-join from a QR scan even if the credentials are correct — they refuse to connect to a network they can't "see". For hidden networks, your guests must add the SSID manually first. Don't bother with a WiFi QR in that case — the friction defeats the purpose.

Print quality matters more than you think

WiFi QRs are usually scanned from arm's length — about 30–60 cm — and indoors, often in low light. To make them reliable:

Print at 4 cm × 4 cm or larger. Smaller looks tidy but fails in dim restaurants.
Use error correction level Q (~25%). Coffee spills, fingerprints, a bit of fade — Q absorbs them all.
Keep a generous white margin around the code. Don't tuck it tight against a logo or border.
Black on white is best. Colored WiFi QRs look classy in a brand book and fail in real-world lighting. Save the styling for hero campaigns and use boring black for utility QRs.

Privacy note

The password is encoded in the QR itself, not stored anywhere remote. Anyone who photographs the printed QR can read your password by scanning it — same as if you'd written the password on the same card. That's fine for guest networks; treat the QR as if it were the password itself.

If you need a QR you can revoke remotely, you'll need a captive-portal or RADIUS-style setup — outside the scope of a static QR code.

TL;DR

One WiFi QR replaces every "what's the password?" interaction
Generate from the WiFi tab on Qropi, test it with your own phone
Use a guest network, not your main SSID
Print at 4 cm+ with error correction Q
Treat the QR as the password — don't broadcast it publicly

Snap a code. Let the guests in.