You install the app and use it to look at pictures in your gallery. As soon as you open a picture, you’re told to go to photobeamer.com in any web browser (not the one on your phone!).
Point the phone camera at the QR code that appears on the website, tap it when it’s visible on the camera screen […] your photos are automatically transmitted to the website and shown on the screen without another click.
This Windows Phone app offers AirPlay-like photo sharing to any device with a Web browser—no extra hardware required.