One Piece has 15 movies and 13 specials, all of which are considered extra material for the anime, so they do not affect the story told by the manga.
Therefore, both the movies and specials are not necessary to watch to understand the plot, so feel free to only watch the anime if you wish since only this one was adapted from the manga.
But if you want to watch the movies and ovas in chronological order, to enjoy all the available content of the series, in the following list I show you how to do it in order, explaining which are remakes or summaries of some One Piece arcs:
How To Watch One Piece In Order with Movies?
NOTE: There are other one piece movies and specials, but they are not necessary to watch, since they are summaries or remakes of one piece arcs. They are the following:
|Specials / Movies||Summary||Descripción||Cover|
|Special: Episode of Nami||Summarize episodes 31 to 45||As an abridged version of the Arlong Arc, this special follows the same general plot. Nami departs from the crew after the Baratie Arc to return to her village. Luffy and the crew decide to pursue her and uncover that she is collaborating with a perilous Fish-Man pirate known as Arlong. The special is a flashback of Nami while the crew was heading to Fishman Island, which is why it aired after episode 560.|
|Special: Episode of East Blue||Summarize episodes 1 to 53||This is an abridged retelling of the initial character development of the first five Straw Hat Pirates during the East Blue Saga. As the Straw Hat Pirates get ready to depart from East Blue and venture into the Grand Line, each of them reflects on their journey up to this point and renews their commitment to their dreams.|
|Movie 8: Episode of Arabasta||Summarize episodes 92 to 130||It is an abridged movie retelling of the Arabasta Arc, the Straw Hat Pirates visit Arabasta, a desert island ruled by Nefertari Vivi's father, Cobra. They uncover a revolution orchestrated by Crocodile, who uses his organization, Baroque Works, to seize power and unveil the nation's hidden secret.|
|Special: Episode of Sky Island||Summarize episodes 144 to 195||An abridged and lightly edited recount of the Sky Island Saga, encompassing the Jaya and Skypiea Arcs. The Straw Hat Pirates journey to Skypiea, an ethereal island in the sky on the Grand Line. Where they must rescue the land from the oppressive deity Enel.|
|Movie 9: Episode of Chopper Plus||Summarize episodes 78 to 91||This film, is a remake of the Drum Island Arc (essentially a "what if" story). It features Franky, Nico Robin, and the Thousand Sunny, who were not present in the original version. Also appearing is Wapol's older brother, Musshuru, who had been exiled and seeks revenge.|
|Special: Episode of Luffy||Summarize episodes 1 and 4||Amidst a battle against Marine warships, the Straw Hat Pirates employ an emergency Coup de Burst to evade a massive cannonball attack. They crash-land on a nearby island, opting to explore as Franky repairs the ship. In a local town, they uncover its history and inhabitants, with Luffy befriending a wax sculptor.|
|Special: Episode of Merry||Summarize episodes 229 to 311||The special follows the Straw Hat Crew's initial ship, the Going Merry, which has been reimagined with fresh animation. It presents a condensed narrative of the Water 7 and Enies Lobby arcs, including events such as Luffy and Usopp's fight, Robin's vanishing act, the crew's confrontation with CP9 to rescue Robin, and their ultimate farewell to the ship.|
|Special: Episode of Sabo||-||While exploring Dressrosa, Sabo reminisces about his childhood with Luffy and Ace. Simultaneously, Luffy joins the Corrida Colosseum tournament in hopes of obtaining his deceased brother's Devil Fruit. They reunite after 12 years, and Sabo consumes the Mera Mera no Mi while Doflamingo's control over the island crumbles.|