QR codes make it easy for people to point-and-tap to access an online menu, connect to Wi-Fi or link to any website. Learn how to create a QR code.

QRstuff and Qrbtf are free and easy-to-use tools that let you customize the correction level on a QR code. You can add whatever information you want and then choose the correction level of 30%.

The trouble is, with QR codes, you may not be able to tell the difference between a malicious code and a legitimate one until you've scanned it. But there are a few ways you can avoid fakes.