How to Make a Wi-Fi QR Code Guests Can Scan (Free)

A Wi-Fi QR code turns "what's the password again?" into a two-second camera scan. Point a phone at the code, tap the banner that pops up, and the device joins your network without anyone typing a 20-character password out loud. You can make one for free in about a minute, and this guide covers how to build it, how to print it so it actually scans, and what to do when it doesn't.

The short version: open the QR Code Generator, switch to the Wi-Fi option, enter your network name, security type and password, then download the image. It is free, there is no sign-up, and the code has no watermark. Because it is a static QR code, it keeps working for as long as those network details stay the same. The rest of this post is the detail that separates a code that works on every guest's phone from one that half of them give up on.

What a Wi-Fi QR code actually contains

There is no magic and no cloud service involved in the scan itself. A Wi-Fi QR code is just a short line of text, encoded as a pattern of squares, that follows a format phones have understood for years. It looks roughly like this:

WIFI:S:NetworkName;T:WPA;P:ThePassword;H:false;;

When a phone camera recognises that prefix, it stops treating the code as a link and offers to join the network instead. That is why a Wi-Fi QR code works on a printed card with no internet connection on the scanning device — everything the phone needs is inside the pattern. It also means the code is only as current as the details you typed in. Change the password later and the printed code becomes a dead end until you generate a new one.

Making the code, step by step

1. Open the QR Code Generator and choose the Wi-Fi type.
2. Type the network name exactly as it appears in your phone's Wi-Fi list. Capital letters, spaces and punctuation all matter.
3. Pick the security type your router uses. For almost every modern home or office router this is WPA/WPA2, and the same setting also covers WPA3 networks on current phones.
4. Enter the password, then read it back character by character. This is where most broken codes come from.
5. If your network is hidden — meaning it does not show up in the list of nearby networks — mark it as hidden. Without that flag the phone looks through visible networks, finds nothing, and quits.
6. Download the image and test it with your own phone before you print anything.

That last step is not optional. Testing on one iPhone and one Android device catches nearly every mistake in under a minute, and it costs nothing compared with printing 50 table cards that nobody can use.

Getting the four fields right

Almost every "my Wi-Fi QR code doesn't work" complaint traces back to one of four values being slightly off. Here is what each field does and the mistake that breaks it.

Field	What it means	What usually goes wrong
Network name (SSID)	The name broadcast by your router	Typed from memory instead of copied; a trailing space; wrong case; using the 5 GHz band's separate name
Security type	WPA/WPA2, WEP, or open	Choosing "open" for a network that has a password, or WEP for a modern router
Password	The network key guests would otherwise type	Confusing 0 with O, l with 1, or missing a symbol at the end
Hidden network	Tells the phone to search for a network that does not broadcast its name	Left unticked on a hidden network, so the scan silently fails

One more quirk worth knowing: semicolons, colons, commas, backslashes and quotation marks inside a network name or password have special meaning in the Wi-Fi code format and need to be escaped. A generator handles that for you, but if a password full of punctuation refuses to work, that is the first thing to suspect.

Turning the code into something you can hand out

A bare QR image on a phone screen is fine for one guest. For a rental, a shop counter, a waiting room or a spare bedroom, you want a small printed card with the network name written underneath the code, so someone can still type the password if their camera is uncooperative.

The quickest route is to drop the downloaded image into a document, add a line of text, and export it for printing. If you build that card in Word, run the file through the Word to PDF converter so the layout does not shift when you open it on a different machine or send it to a print shop. If the downloaded image has more white space around it than you want, the image cropper trims it down — but leave a clear white margin of at least four squares' width around the pattern, because scanners rely on that quiet zone to find the code's edges.

Planning something large, like a poster or a window sticker? Enlarging a small raster image makes the edges of the squares mushy. Tracing it into vector form with the PNG to SVG converter gives you a file that scales cleanly to any size. Do a real scan test on the printed result before you order a hundred of them — a traced QR code should scan fine, but a code you have not tested is a code you cannot rely on.

How big does it need to be?

The rule of thumb printers use is that a QR code should be about one tenth the size of the distance people scan it from. A code on a table card that guests hold in their hand can be small; a code on a wall across the room needs to be much larger.

Where it lives	Typical scan distance	Practical printed size
Table card or fridge magnet	Held at arm's length	Around 2–3 cm across
Counter sign or guest folder	Half a metre	Around 5 cm across
Wall poster in a café or lobby	Two to three metres	20–30 cm across

Beyond size, three things matter: high contrast (dark pattern on a light background, never the reverse), a matte rather than glossy surface so overhead lights do not blow out the pattern, and no logo or text sitting on top of the squares.

The security side, honestly

A Wi-Fi QR code does not make your network more secure, and it does not make it less secure either. It is a faster way to hand over a password you were going to hand over anyway. Treat the printed code exactly like a password written on a sticky note: anyone who can see it, or photograph it through a window, can join.

Two habits make that a non-issue for most people. First, put guests on your router's guest network rather than the main one, so their devices cannot see your printers, cameras or shared drives. Second, keep the code somewhere guests can see and passers-by cannot. If you run a business, changing the guest password on a schedule and reprinting the card is a reasonable routine — and it is a good reason to keep the source document rather than only the exported image.

This is general information rather than security advice; if you are setting up Wi-Fi for a regulated environment, follow whatever your IT policy says.

When the scan fails

Work through these in order. They are ranked by how often each one turns out to be the culprit.

• A typo in the password. Test-join the network by typing the password manually first. If that fails too, your code was never the problem.
• The wrong band. Some routers give the 2.4 GHz and 5 GHz bands separate names. Older phones, smart speakers and e-readers often only see 2.4 GHz, so encode that network name if your guests bring mixed hardware.
• Hidden network flag missing. The scan appears to do nothing at all. Regenerate with the hidden option enabled.
• QR scanning switched off in the camera. On iPhone this lives in Settings, then Camera. On Android it is usually a toggle in the camera app's own settings, and on older versions of Android you may need a separate scanner app.
• The print is the problem. Too small, too glossy, too low contrast, or missing the white margin. Try scanning the same code on screen — if that works, reprint rather than regenerate.
• Captive portals. Networks that make you accept terms on a web page before you get online cannot be fully automated by a QR code. The code can join the network; the guest still has to tap through the portal.

Other things worth encoding while you are there

The same generator handles plain URLs and text, which covers most of the small jobs a Wi-Fi code sits next to: a link to your menu, a review page, a booking form, or a contact card taped to a workshop door. These are static codes, so they do not expire and do not stop working if you never come back to the site. The trade-off is that a static code cannot be re-pointed later — if the destination changes, you generate and reprint a new one, which is exactly the same deal as with the Wi-Fi password.

Make the code, test it on two phones, print it big enough, and keep it on the guest network. That is the whole job.