One Piece is an awesome tv series. If you want to watch it online (season 1-6) then here are a few options (we checked these as recently as December 2018):
- Amazon Video (for USA, UK & Canada!) – The entire series (season 1-6) is on Amazon Video, and you can find it here and have access to it immediately! (by the way, you can sign up for an Amazon Video free trial and get access to loads of tv shows like One Piece 100% free for 30 days here! Just cancel before the trial ends and you won’t pay anything ever).
- https://www.popcornflix.com – Update – this site no longer has One Piece
- https://flixtor.to – this site is not as good as Amazon Video or PopcornFlix but it does have some titles that the others don’t, and of course it has Blade Runner 2049 too (Update – very poor quality One Piece on here)
Hopefully the above information will help you watch One Piece online for free, and enjoy it like I did!