Eduardo Pivaral has created a tool:
PlanTrace takes your raw
EXPLAINoutput, parses it into a structured tree, and gives you three ways to reason about it — all in your browser, with no data ever leaving your machine.
Click through for a link. It looks a bit like Paste the Plan, in that it’s an online tool that accepts an explain (or execution) plan and generates a visual output for it.