I think he could have saved even more space in his final pass by uppercasing the business names: HTTPS://S.NSW.GOV.AU/C/121321/Test+NSW+Government+QR+code (bin

I think he could have saved even more space in his final pass by uppercasing the business names: HTTPS://S.NSW.GOV.AU/C/121321/Test+NSW+Government+QR+code (binary mode) HTTPS://S.NSW.GOV.AU/C/121321/TEST+NSW+GOVERNMENT+QR+CODE (alphanumeric mode) He ruled out full alphanumeric mode early on, prior to ditching Base64, but it's sensible to reconsider it by the time you reduce the URL this far. He goes on to allude to simplifying or even dropping the business names to save more space at the cost of lost functionality, but just uppercasing them seems benign to me. It's a nice write-up all the same.