Here's an episode guide without the filler eps:
1-49, 52-53, 62-92, 94-97, 100, 103-130, 144-195, 207-212,
217-219, 227-278, 284-290, 293-302, 304-316, 320-325,
337-381, 385-405, 408-425, 430-456, 459-491, 493-496, 500-505, 507-541, 543-574,
579-589, 591-625, 629-746, 752-774, 776-779, 783-806, 808-871
Imo it's not worth it anymore since the anime's pacing went to shyt. If you make it pass Arlong Park. Skip the Davey Back arc (purple font) until it's last episodes 227-228 and Thriller Bark (blue font) I suggest you start halfway in or fast forward that shyt till shyt gets real idgaf
Davy Back and Thriller Bark aren't filler but that shyt gonna try your patience.
Anime starts going trash at Punk Hazard arc (red font) where shyt starts to feel dragged out.
If you getting series fatigue stop and continue where you left off in the story by reading the manga.