Best frontend for self-hosted ebooks?

If you are already using Calibre to organize your ebooks, CalibreWeb is a pretty great solution.

i absolutely love kavita

It's really clean super fast and works really well as a webapp on all devices. Works well with all kinds of fileformats and does a decent job of finding meta data.

I would've recommended Komga, but Kavita has a built-in ereader which makes that a bigger win in my book.