You can easily scan QR codes that are already on your phone

Android and iOS both have built-in tools to easily open QR codes from screenshots.
Stuff on MSN

How to scan a QR code on iPhone and Android

You’ll be a scanner in no time with this guide to getting the all-conquering QR codes ...
BGR

How Do You Scan A QR Code That's Already On Your Phone's Screen? It's Surprisingly Easy

QR codes, short for Quick-Response codes, are pretty neat. You scan the code using your device's camera, which picks up embedded information, often to share details or direct you to a website. The ...
Android Police

Android now makes its QR scanner way easier to use with one hand

Jay primarily writes news and deals posts for Android Police. Before joining AP, he spent the past several years yammering on about the crazy world of Android for various tech outlets. Besides ...
9to5google

Google prepares a new look for Android’s built-in QR code scanner

Android has a built-in QR code scanner tool that you might not even know about, but Google is in the process of giving it a redesigned look. Back in Android 13, Google added support for a built-in QR ...