>>2963
This isn't a site but a font that can supplement any site by adding furigana on to Kanji.
https://furifont.antfu.me/

It's a cool idea.
Attached is how the following web page looks after using the bookmarklet to switch to Furifont on the page.
https://news.yahoo.co.jp/articles/578592f06e315eca7935951b678762bfcb4dbcb2

I had to zoom in a lot to make the furigana legible, but I like having this capability.