I mean, "webtoons" aren't really a thing in western culture. You can think of the posts like chapters from a comic. Anyway, here's the latest chapter[0] of 마음의 소리 (The Sound of Your Heart) which is popular. Enough to have its own tv show on netflix.

You can see more of them at comic.naver.com [1]

[0]: https://comic.naver.com/webtoon/detail.nhn?titleId=20853&no=...

[1]: https://comic.naver.com/index.nhn

I really enjoyed the first season of The Sound of Your Heart.

I read 'Tower of God', it's basically a Shonen like Naruto. (google as I can't link it here- though naver has a public open version somewhere)

Tower of god is available on webtoons.com which is the western site of naver (as in they own it and most of their popular stuff ends up there). It also has a quite good app as others have pointed out.

The site also has stuff made by western artist these days.

If you like really, really dark SF, I would recommend Denma, but for some inexplicable reason they seem to have rearranged the panels in some dummy's-mobile-friendly format. What a sacrilege.

https://www.webtoons.com/en/sf/denma/1-a-dog-of-panama-1/vie...

The original format actually looks like this:

https://comic.naver.com/webtoon/detail.nhn?titleId=119874&no...

Disclaimer: the author is infamous for never being on time, and it's not complete yet.

Holy cow. I've been reading Denma on webtoons.com for over a year now, I had no idea they changed the format. The original looks so much better.