It’s a fan made project that cuts out the recaps, the filler arcs, and most of the OP and ED sequences, keeping one of each at the beginning/end of each arc. It then condenses a lot of the story arcs and reorders some events to (mostly) fix the pacing issues of One Piece and cut down on the run time while preserving the original story.

They’ve got a website out there, but I can’t link to it here, since it’s technically a pirate site. No pun intended. It should come up with a google search though.