[diatone]

Take a photo on your phone, OS recognises the link in the image, makes it clickable, done. Or, use a QR code instead

[ceejayoz]

https://news.ycombinator.com/item?id=9224

[jeeyoungk]

This is the answer; turns out that non-transformed links are the most generic data format, without any "compression" - QR codes or a third-party-intermediary - needed.