Joan Zanni is a voice actor known for his work in Catalan and Spanish dubs of anime and other animated series. His career encompasses both voice acting for foreign-language adaptations and direction within the dubbing industry.

Zanni has contributed his voice to a variety of anime series and films. He is notably the Spanish dub voice for the character Daijiro Ohara in the long-running television series Kochira Katsushika-ku Kamearikouen-mae Hashutsujo, taking over the role from episode 204 onward. In the OVA series Hades Project Zeorymer, he provided the voice for the character Kou Oki in the Spanish dub produced for Spain. He also voiced the character Lu Low in the Catalan dub of the OVA series Queen Emeraldas.

His other anime credits include voicing Nam in the early Catalan dub episodes of Dragon Ball and taking on roles in the Spanish dubs of projects such as the Read or Die OVA and the film Sailor Moon R: The Movie. Beyond performance, Zanni has also worked as a dub director, overseeing the adaptation of foreign-language content. He is the father of Marc Zanni, also a prominent voice actor in Catalonia known for his work as the voice of Son Goku in the Catalan dub of Dragon Ball.