A QR code (Quick Response code) is similar to classic barcode, but it can handle more data than the barcode and is readable by high-end mobile phones with proper QR code processing app like Barcode Scanner (for Android) and QR Reader (for iPhone). Nowadays, QR codes are widely using for various purposes like sharing links, contact information, email address, sms, text, etc and at various places, for example, magazines, websites, business cards, etc.
There are two methods. One is using your existing webcam and another is online (without any camera or application) method.
There are few free online QR code readers available for you to decode the QR code on the cloud such as Online Bar Code Reader and miniQR.
Online Bar Code Reader (www.onlinebarcodereader.com) is a multi purpose bar code reader and supports various bar code formats. You can upload QR Code image from your desktop to decode it.
MiniQR reader (miniqr.com/reader.php) is another tool that lets you easily decode any QR code by just giving the URL of the qr code image. It even lets you scan QR codes using your webcam.
Qrcode (qrcode.good-survey.com/qr-code-decoding#upload) is another online tool that lets you decode your QR code by uploading it from your desktop.
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