WiFi QR code vs sharing the password
Short answer: for getting guests onto your WiFi, a QR code is usually less hassle than reading out the password — one scan and the phone joins, with nothing to mistype. But a QR code is not more secret: whoever photographs it has the password. So use a code for fixed spots, complex passwords and lots of guests; just say it for a one-off when they're right beside you.
| Factor | WiFi QR code | Sharing the password |
|---|---|---|
| Speed | Point, tap, connected in seconds | Read out / type character by character, easy to mistype |
| Complex passwords | Length and symbols don't matter — just scan | The longer it is, the harder to dictate and type |
| Best for | Cafés / rentals / meeting rooms / regular guests | A one-off, when the person is right next to you |
| Secrecy | A photo of the code = the password; not more secret | Saying it aloud can be overheard too |
| After a password change | Regenerate and replace the printed code | Just tell them the new one |
| Cost | Free, print one sheet | Free |
Why does one scan connect automatically?
A WiFi QR code doesn't store a picture — it stores a short line of standardised text that looks like WIFI:T:WPA;S:NetworkName;P:password;;. When the camera reads it, the phone recognises a “join this WiFi” instruction and offers to connect — the password is already inside, so you never type it.
That's also why it shines with complex passwords: however long or messy the password is, to a scanner it's just text that fills in instantly — no chance to misread or mistype.
Use a QR code when
- · It's a café, restaurant, rental or office — many guests, given again and again
- · The password is long and messy to dictate
- · You want to print it on a table tent, poster or menu for the long run
Just say it when
- · A friend is over for a bit — a one-time thing
- · They're right next to you and a sentence is quicker
- · You've no way to print or display a code
A few honest safety notes
- A QR code is convenience, not secrecy. Photographing it = having the password, so don't post your main network's code where strangers can see it.
- Put guests on a guest network with its own password: even if the code walks off, it can't touch your main network or internal devices.
- Changed the password? Swap the code — the old one still carries the old password and will just fail.
QR Cat builds your WiFi QR code locally in your browser — the password is never uploaded or tracked, so that part you can trust.
Frequently asked questions
Can both iPhones and Android phones scan a WiFi QR code?
Almost always. iPhones have read WiFi QR codes straight from the Camera app since iOS 11 (2017) — point at the code and a “Join Network” prompt appears. Android can generate and scan WiFi QR codes in system settings from Android 10 onward; older Androids can still scan with the camera or Google Lens. So one printed code works for the vast majority of guests.
Is a WiFi QR code secure? Does it leak the password?
Be clear about what it buys you: convenience, not secrecy. The code actually encodes the network name and password in plain text, so anyone who photographs it effectively has the password — no different from you saying it out loud. Don't stick your main network's code where strangers can see it; put guests on a separate guest network with its own password.
I changed my WiFi password — does the old QR code still work?
No. The password is baked into the code. Once you change it on the router, the old code still carries the old password and will fail to connect. Generate a fresh code with the new password and replace the one you printed.
Can I make a QR code for a hidden network (non-broadcast SSID)?
Yes. Tick “Hidden network” when you generate it and the code is flagged H:true, so the phone connects the way a hidden network expects. Make sure the network name matches your router exactly, including capitalization.
Does a WiFi QR code cost anything or expire?
On QR Cat it's free and never expires. We make a static code with the password encoded right in the pattern — nothing routes through our servers and nothing is uploaded, so there's no trial to lapse.
Updated · QR Cat team