There are two ways to read a QR code: point a live camera at it, or have software detect it inside an image file. Both end at the same place, the decoded link, but they suit different situations. Knowing which to reach for saves a lot of frustration.
Camera Scanning: For Codes in the World
Live camera scanning is for codes that physically exist in front of you, on a poster, package, screen, or sign. You aim, the camera detects the code, and you follow the link. It's instant and needs nothing but the camera app on most phones.
Image Reading: For Codes That Are Files
An image reader is for codes that exist only as pictures, screenshots, downloads, or photos already saved on your device. You can't point a camera at your own screen, so the reader detects the code inside the file instead.
Where Each Shines
Use the camera when you and the code are in the same place. Use an image reader when the code arrived digitally, in a message, email, or document, or when you're on a desktop with no camera. Many tools offer both modes side by side.
Reliability Factors
Camera scans depend on lighting and steadiness; image reads depend on the picture's quality and resolution. Either way, a clean, high-contrast code with a clear margin, like one made with an image QR generator, performs best.
FAQ
Common questions are answered in the FAQ section below.