Yes I use this one, not as compact but it remains readable/editable, more notably Kibana uses it as well.

thank you. I was running into a JSON parse error on a script for a couple of days. I love JSON but this compact notation using rison helped me quickly debug the error! :-)

Thanks again!

Looks cool, I just checked into it. It does work well, but doesn't appear do anything to reduce repeated substrings. Maybe a combination of the two would work well though.