Postgres Explain Visualizer
Paste the output of EXPLAIN (ANALYZE,BUFFERS)
in the Plan
field. Optionally, provide the original query.
When you hit Submit
Your plan will be stored in the backend so you can have a permalink to share with colleagues or put in documentation.
There is no public archive, but consider hosting your own copy or using either a non-persistent alternative or an optionally obfuscating alternative if you're concerned about security.