How to scan a QR code on your phone or computer

You can scan a QR code using the camera on your smartphone, tablet, or computer — however, you may need to download an app.

How to scan a barcode with your iPhone using a third-party app

You can scan a barcode with your iPhone by using a third-party app. Currently, there are no built-in apps that can read ...
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'QR is cool' is a website that shows how excellent QR code error correction is, and QR codes can maintain their original information even if they are significantly altered.

QR codes have four error correction capabilities: Level L, Level M, Level Q, and Level H. Level L allows the original information to be preserved even if a maximum of ...