You can turn on the camera on your Windows computer immediately using the built-in Camera app, or another app that uses it.

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

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 the ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. You probably already know how to scan a QR code with your phone. It ...