You can download the whole visualizer as a simple html file and use it this way. No need to obfuscate or sanitize anything at all.

https://github.com/dalibo/pev2

Thank you for sharing - I misunderstood - this is a javascript visualizer, and has no additional analytic capability beyond visualization, or did I miss something?

Yeah, you’re right. This is the visualizer that’s linked in the parent comment. I just wanted to point out that you can use it locally without sending your explain plan to anyone. Sorry for the confusion, I’ll edit my original comment.

I do the same, but because it became tedious to insert the query & query plan manually, I wrote pev2-cli [1].

[1] https://github.com/derhuerst/pev2-cli

Whatever the domain, a query isn't necessarily critical or sensitive. It only is if it contains personal information (eg querying by a bank account number or a name), or if the query itself is part of your competitive advantage (unlikely)