"What's the Wi-Fi password?" is one of the most repeated questions in any café, salon, clinic, co-working space or guest bedroom on earth. The answer is usually a long string of characters taped to a wall in a font nobody can read, followed by two minutes of "is that a capital I or a lowercase L?"

A Wi-Fi QR code ends that conversation. Someone points their camera at a small printed square, taps a prompt, and they're connected. No app, no typing, no staff member walking over to spell out Cafe@2026!.

This guide covers what's actually inside a Wi-Fi QR code, how to make one for free in about three minutes, which phones support it, the mistakes that quietly break them — and the part most businesses miss: what to put next to the code so a free connection turns into something useful for you too.

What a Wi-Fi QR code actually contains

A QR code is just a container for a short piece of text. Most of the time that text is a web address. In a Wi-Fi QR code, the text is a small structured string in a format phones have understood for years:

WIFI:T:WPA;S:MyNetworkName;P:MyPassword;H:false;;

Four parts, and each one matters:

T — the security type. Use WPA for any modern password-protected network (this covers WPA2 and WPA3 personal on most devices), WEP only for genuinely ancient hardware, and nopass for an open network with no password at all.
S — the SSID, meaning the network name exactly as it's broadcast, including capitals and spaces.
P — the password, again exactly as typed. Leave it empty for an open network.
H — whether the network is hidden. false for a normal network; true only if you've deliberately stopped broadcasting the name.

When a phone scans this, it recognises the WIFI: prefix and offers to join the network instead of opening a browser. The credentials are handed to the operating system directly.

That leads to the single most important thing to understand about these codes.

Your password is inside the code, not behind a link

A Wi-Fi QR code is a static code. The password isn't stored on a server somewhere and fetched when someone scans — it is physically encoded in the black-and-white pattern itself. Anyone with a scanner app can read the plain text back out of the square.

Two practical consequences follow:

Change the password and every printed code is dead. You have to regenerate and reprint. There's no editing a static code after the fact — that's the core difference explained in our guide to dynamic vs static QR codes.
Treat it like a printed password, because that's what it is. Don't put your main office network — the one your accounts software and printers live on — into a code taped to a public wall. Put your guest network in there instead. Almost every modern router can broadcast a separate guest network that gives internet access without access to the devices on your main network. Ten minutes in your router settings, and the risk drops to roughly zero.

For a home or a small shop this is fine. For anything with real data behind it, guest network first, always.

How to make a Wi-Fi QR code free (3 minutes)

There are three routes, and the first one is the one most people don't know exists.

Route 1 — straight from an Android phone (no tools at all). On Android 10 and later, open Settings → Network & internet → Wi-Fi, tap the network you're currently connected to, and tap Share. After a fingerprint or PIN check, the phone displays a Wi-Fi QR code on screen. Screenshot it. That's your code, generated by the phone, with the credentials already correct.

Route 2 — from an iPhone. iOS doesn't have a built-in generator, but it has a shortcut: iPhones can scan Wi-Fi codes natively, and you can build one using the Shortcuts app or simply use any free web generator.

Route 3 — a free web generator. Any reputable free QR code generator with a "Wi-Fi" option will do it. You enter the network name, password and security type, and it builds the WIFI: string and renders the code. Look for one that generates the code in your browser and lets you download a vector file (SVG or PDF) rather than a small PNG — that's what keeps it crisp when printed large.

Then, before you print anything:

Test on two phones, one iPhone and one Android, from the distance people will actually stand at.
Check the capitalisation of both the network name and the password character by character. This is the number one reason a Wi-Fi code silently fails.
Print it at least 2.5–3 cm (about an inch) square for close-range scanning, larger if it's on a wall people read from across a room. Our QR code size guide has the distance-to-size maths.

Which phones support it

iPhone — iOS 11 and later scan Wi-Fi QR codes from the stock Camera app. That's every iPhone still in meaningful use.
Android — Android 10 and later scan them from the camera or Google Lens, and can also generate them. Android 9 and earlier generally need Google Lens or a scanner app.

In practice, the overwhelming majority of guests will connect on the first tap. Keep the password printed in small text underneath the code anyway, as a fallback for older devices — it costs you one line and saves an awkward conversation.

The mistakes that break Wi-Fi QR codes

Special characters that aren't escaped. If your password or network name contains \, ;, ,, : or ", those characters have structural meaning in the WIFI: format and must be escaped with a backslash. Good generators handle this automatically; hand-typed strings often don't. If your code scans but the connection fails, this is the first thing to check.

Using it for a corporate WPA2-Enterprise network. The standard Wi-Fi QR format handles personal networks with a shared password. Enterprise networks with individual usernames and certificates aren't covered by it.

Laminating over a glossy surface. Glare kills scans. Matte finish, high contrast, dark code on a light background, and never invert the colours.

Assuming it can be edited later. It can't. If your password rotates quarterly, either accept the reprint or reconsider whether you need a rotating password on the guest network at all.

What to put next to the code (the part businesses miss)

Here's the honest gap in the Wi-Fi QR code idea: it's a lovely convenience for your customer and it does absolutely nothing for you.

Someone connects, and then they're on Instagram. You gave away bandwidth and got nothing back — no menu view, no review, no booking, no way to reach them again.

The businesses that get this right print two codes on one card, or one code that leads somewhere useful:

A café pairs the Wi-Fi code with a QR code menu so the person who just sat down orders without waiting for a printed card.
A salon pairs it with a booking page so the client rebooks their next appointment while they're still in the chair.
A restaurant pairs it with a Google review QR code — the moment right after a good meal is the highest-conversion moment you will ever get for a review.
A co-working space or clinic uses a single link page holding everything: Wi-Fi instructions, the price list, the booking link, the WhatsApp number, the feedback form. One code, updated any time, no reprinting.

That second code is the one worth making dynamic. Unlike the Wi-Fi code, a link-based code can point somewhere new whenever you want it to — a QR code that never expires and that tells you how many people scanned it. If you run a restaurant, our roundup of QR code ideas for restaurants covers a dozen more of these pairings.

Frequently asked questions

Is a Wi-Fi QR code safe? It's exactly as safe as writing the password on the wall — the credentials are readable by anyone who scans it. Use it for a guest network, not your main one, and it's a sensible trade.

Can I change the password without reprinting the code? No. The password lives inside the pattern. Change the password, regenerate the code, reprint. This is the fundamental limit of static codes.

Does it work without internet? Yes. Scanning and joining is a local operation between the phone and the router — no internet needed to read the code.

Do people need an app? No. Any iPhone on iOS 11+ or Android device on 10+ handles it from the stock camera.

Can I put my logo in the middle? Yes, within limits — QR codes tolerate some obstruction thanks to built-in error correction. See our guide to QR codes with a logo for how far you can push it before scans start failing.

Why does my code scan but fail to connect? Almost always a typo in the password, wrong capitalisation in the network name, an unescaped special character, or the wrong security type selected. Our guide on why a QR code isn't working walks through the rest.

The bottom line

A Wi-Fi QR code is a three-minute fix for a question you answer fifty times a week. Make it from your guest network, test it on two phones, print it matte and big enough, and keep the password in small text underneath.

Then make the second code — the one that actually earns something. Free Wi-Fi is hospitality. A menu, a booking link or a review request sitting right beside it is a business.

Create your free QRYZEN page and QR code →

Wi-Fi QR Code: Share Your Network With One Scan (Free, No App)