QR codes are popular ways to scan menus, tickets, and apps. Here's how to do it from your Android phone or iPhone, and what the FCC says about it.

You probably already know how to scan a QR code with your phone. It’s simple enough: just open the camera app, point your phone at the code, and tap the link. What if you’re on your computer ...

You probably already know how to scan a QR code with your phone. It's simple enough: just open the camera app, point your phone at the code, and tap the link. What if you're on your computer, though?

You don't need your phone to open a QR code. You probably already know how to scan a QR code with your phone. It's simple enough: just open the camera app, point your phone at the code, and tap ...

Despite the dwindling popularity of QR codes -- except for app-specific QR codes, like Snapchat's Snapcodes -- Chrome for iOS now makes it extra-easy to scan a QR code, should you ever spot one.

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