I made an HTML/DOM viewer you can paste into your console to view or debug any website in 3D. Choose from random/gradient/clear colors or whether layers have sides.

You can save it as a bookmarklet so it's 1 click away. It's just a tiny IIFE JS function.
https://gist.github.com/OrionReed/4c3778ebc2b5026d2354359ca49077ca

3D DOM viewer, copy-paste this into your console to visualise the DOM topographically.

3D DOM viewer, copy-paste this into your console to visualise the DOM topographically. - dom3d.js

Gist
Complex websites are the funnest to look at, here's Twitter for example. Rendering the sides works fastest in Safari, oddly, but performance-wise Chrome and Firefox are a lot better for large websites.

@orion Twitter's not truly complex, it's just stupid :D

I do vaguely remember there being some kind of devtools plugin for one of the major browsers, allowing such a 3d view... like a decade ago, and unfortunately it didn't live for too long.

I think it's a great tool if the UX can be done right... and I really wish the web stopped being as stupid as it currently is (see indeed: twitter as html source code)

@ralesk @orion I do also remember that tool, but cannot remember the name. It had it's uses and it's good to see someone has revived the idea!