Wi-Fi QR code generator
A Wi-Fi QR code holds your network name, password and security type, so a guest points a phone camera at it and joins without typing anything. Opo Codes makes one for free in your browser, with no account, and reads the code back to check it before you print.
Open the generatorFree. Runs in your browser.
How to do it
- Open the generator with Wi-Fi already selected.
- Type the network name exactly as phones show it, then the password.
- Choose the security type (WPA for most routers). Tick Hidden network only if the name is not broadcast.
- Wait for the VERIFIED stamp, then download PNG, SVG or PDF and print it.
What is inside a Wi-Fi QR code
The code is plain text in a fixed shape: WIFI:T:WPA;S:name;P:password;; where T is the security type, S the network name and P the password. A phone camera recognises that shape and offers to join.
Five characters have a special meaning inside that text: backslash, semicolon, comma, colon and double quote. The generator puts a backslash in front of each one for you. Worked example: a network called Cafe;Nook with the password tea:time becomes WIFI:T:WPA;S:Cafe\;Nook;P:tea\:time;; and still joins correctly.
Pick the right security type
WPA / WPA2 fits nearly every router made in the last ten years. WEP is very old and only for routers that cannot do better. No password makes a code for an open network.
If you choose a secured type and leave the password empty, the generator makes no code at all, because a code without the password could never join. Add the password or switch to No password.
Print it so it scans
The VERIFIED stamp means the generator drew the code and then read it back successfully. A VOID stamp comes with the reason, such as low contrast, a light code on a dark background, or a logo that covers too much.
Keep the code dark on a light background, leave the empty border (4 modules is the standard), and set the scanning distance in the export panel: 30 cm for a table card, more for a wall sign. The generator then shows the smallest safe print width.
Think about who can scan it
Anyone who scans the code can read the password out of it. For a shop or cafe, put the code on your guest network, not the one your till or office computers use. If you change the router password, print a new code.
Questions
Will it work on iPhone and Android?
The code uses the common WIFI: format that the built-in camera apps of current iPhones and Android phones understand. We have not tested every phone model, so scan your printed code once yourself.
Is my password sent anywhere?
No. The code is drawn in your browser and the generator does not send the password to a server.
Can I make the code without an internet connection?
Yes, once you have opened the generator one time it also works offline.
Does the code expire?
No. The network details are inside the picture, so it works until you change the network name, the password or the security type.