Terence EdenA recursive QR code.
Phil Archer@Edent Interesting (to me) that you used upper case for the scheme and domain name, thus using the most efficient way possible to encode the URL. I'd be very interested if you hear of anyone who's phone tries to open an app rather than just the browser. Seems to happen on Nokia G-series phones.
@PhilA Yup! I wrote a bit about it at https://shkspr.mobi/blog/2025/02/why-are-qr-codes-with-capital-letters-smaller-than-qr-codes-with-lower-case-letters/
Which app did it try to load?
Why are QR Codes with capital letters smaller than QR codes with lower-case letters?
Take a look at these two QR codes. Scan them if you like, I promise there's nothing dodgy in them. Left is upper-case HTTPS://EDENT.TEL/ and right is lower-case https://edent.tel/ You can clearly see that the one on the left is a "smaller" QR as it has fewer bits of data in it. Both go to the same URl, the only difference is the casing. What's going on? Your first thought might be th…