Reads the QR code in an image without opening the link it contains: you can check the address before going there. Paste the address of a Lab image or choose a file. The tool finds the three position squares, rebuilds the grid and decodes the content.
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In real life: the phone camera (which shows the address before opening it), ZXing, zbarimg. « Quishing » (QR code phishing) sticks fake QR codes on parking meters, charging stations or menus: the address often imitates the real site's, one letter apart.