Is there any way to get a toonish outline without using solidify modifier

[Shiroethewolf (シロエ)]

I’m trying to achieve an outline for my model to give it a toonish look without using solidify modifier cuz my mesh have a problem after boolean clean-up with an addon and it left behind a messed-up out-line when I turned on the solidify modifier
(Before using solidify modifier.)

(After using solidify modifier.)

If there is a way to achieve a toonish outline without using the solidify modifier, I hope that it can be used in an animation as well.

[joseph]

There’s a bunch. The simplest way is the grease pencil line art modifier. There’s also the layer weight node, freestyle, and more. Just Google it, there’s tons of info out there