Read a post by David Shanske (david.shanske.com)
I just pushed the first set of improvements to Parse This to support JSON-LD.  Parse This takes an incoming URL and converts  it to mf2 or jf2. It is used by Post Kinds and by Yarns Microsub  to handle this.
So, assuming the default arguments are set, the parser will, for a URL that is not a feed...

Also, installed and looks good!