Honestly, for every reader as of today, the Chilkat Tools component is just excellent at this task, reliable and fast, as it is compiled as a COM+ component. I'm using it since 2016 without a glitch for all my works related to JSON and Classic ASP.

I'm using it on my own servers, as being specialized in Classic ASP hosting.
So if your hosting company offers it, go for this component ! It will greatly simplify things

Otherwise, yes the `aspJSON` class may be enough for simple JSON data structures (I used it in the past).