I have realized that there is a big design space here, as I recently did a write-up of my take, Id30. 30 bits of information encoded base 32 into six chars, eg

I have realized that there is a big design space here, as I recently did a write-up of my take, Id30. 30 bits of information encoded base 32 into six chars, eg bpv3uq, zvaec2 or rfmbyz, with some handling of ambiguous chars on decoding. https://magnushoff.com/blog/id30/ https://magnushoff.com/blog/id30/