I've been using a Chrome extension I created for the same purpose. The nice part is that it does it without making an external web request, using javascript and canvas.
Also, iPhone users should check out the Scan app[1] for a QR code reader. It's by far the fastest starting, simplest QR scanner I've been able to find; Most of the other apps seem to be cramming in price-checking features and have butt-ugly icons.
Also, iPhone users should check out the Scan app[1] for a QR code reader. It's by far the fastest starting, simplest QR scanner I've been able to find; Most of the other apps seem to be cramming in price-checking features and have butt-ugly icons.
[1]: http://scan.me