QR codes can house a whole lot of data, from the URL of a webpage or service, to where to directly download an app. Here's how to scan them.

All NSW workplaces and retail businesses will be required to use Service NSW QR codes from next month.

Can you scan a QR code from a screenshot or photo? Yep, you can.

NSW Premier Gladys Berejiklian announced on Wednesday all hospitality venues and hairdressers in the state will need to use the Service NSW app and the Service NSW QR system from January 1.

You should be vigilant when it comes to QR codes, but don't be afraid to scan them.