A really cool way to share WiFi passwords… Must try to see if I can print this on an NFC tag and have the best of both worlds…
pure JS WiFi QR Code Generator

Ever wanted to create a cool QR code for your guests? But never wanted to type in your WiFi credentials into a form that submits them to a remote webserver to render the QR code? QiFi for the rescue! It will render the code in your browser, on your machine, so the WiFi stays as secure as it was before (read the code if you do not trust text on the internet :-))!