I used Amazon an an example because they are the first I learned to do this trick with. I know Amazon has canonical ways to shorten URLs. Many other sites don't

I used Amazon an an example because they are the first I learned to do this trick with. I know Amazon has canonical ways to shorten URLs. Many other sites don't. Here's Monoprice: https://www.monoprice.com/product?c_id=102&cp_id=10260&cs_id=1026002&p_id=29523&seq=1&format=2 https://www.monoprice.com/product?c_id=102&cp_id=10260&cs_id... p_id is all that matters: https://www.monoprice.com/product?p_id=29523 https://www.monoprice.com/product?p_id=29523 95 chars to 45 chars. CDW is more fun. They expect some pretty part of the URL, but don't do anything with it. So you shorten it to 1 char if you want the link to still work: https://www.cdw.com/product/Tripp-Lite-10ft-Cat6-Gigabit-Snagless-Molded-Patch-Cable-RJ45-M-M-Black-10ft/934322?pfm=srh https://www.cdw.com/product/Tripp-Lite-10ft-Cat6-Gigabit-Sna... becomes: https://www.cdw.com/product/T/934322 https://www.cdw.com/product/T/934322 127 chars to 37.