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Higher error correction makes scanning undamaged QR codes less reliable
(huonw.github.io)
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this post was submitted on 30 Dec 2023
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Can't remember the last time I scanned a qr code, are they used in some businesses or something?
Many restaurants have their menu just being a qr code nowadays. It became usual during covid, but manu stull keep it on the tables. The other day I was told explicitly to use it since they didn't have a physical version.
They're pretty useful for sharing wifi logins in person for smartphones, for example.
They're still used for instant login on multiplatform services like Steam or Discord. A device that's not logged in will show a QR code next to the login prompt, and scanning it with a logged in device will show a prompt to allow the other device to log in to your account without needing to enter a username or password.
Other than that, I only see them at restaurants to open their menus in a web browser.