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About

Wi-Fi QR Code

Type the network name and the password, and the QR code is drawn as you type. Point an iPhone or Android camera at it and the phone offers to join, with no app and no typing. The code holds the network’s details itself, so it keeps working until you change the password, and nothing passes through this site.

What it does

  • The code holds text such as WIFI:T:WPA;S:Home;P:secret;; which is the format both phone systems read.
  • A backslash, semicolon, comma, colon or quote in the name or the password is escaped with a backslash, where hand-made codes fail.
  • Security None leaves the password out, for an open network.
  • Tick Hidden network for one that does not broadcast its name, and the phone looks for it anyway.
  • The advice line gives the smallest width to print it at: a longer password makes more modules and a larger minimum.
  • A PNG up to 4096 pixels suits a sign by the door, and an SVG a design program.

How to use it

  1. Type the network name exactly as the phone lists it, capitals included.
  2. Type the password, and pick the security the router uses.
  3. Scan the code with your own phone before printing it.
  4. Download the PNG or the SVG and print it where guests can see it.

What it does not do

  • Keeping the password secret: anyone who scans the code, or reads its text, has the password, so print it only where you would write the password itself.
  • Networks that sign in with a user name, as offices run: the camera apps that join from a code expect a password alone.

Questions

Why does my phone not offer to join?

Most often a typing slip: the network name must match exactly, capitals and spaces included. Check that the security matches the router’s and that the phone is in range; a hidden network also needs Hidden network ticked.

What happens when I change the Wi-Fi password?

The old code stops joining, since it holds the old password. Make a new one with the new password and replace the print; nothing else needs undoing, because nothing was stored anywhere.

Is it safe to make a Wi-Fi code on a website?

Here, yes: the code is drawn in your browser, and the name and password never leave the page. Still treat the printed code like the password written down.

Everything here runs in your browser. Nothing you type, paste or open is uploaded, and there is no account and no queue. How that works.

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