Nintendo Switch Online (NSO) is an online subscription service operated by Nintendo for its video game consoles, the Nintendo Switch and Nintendo Switch 2. The service is Nintendo's third-generation online service after Nintendo Wi-Fi Connection and the Nintendo Network. The subscription service officially launched on September 18, 2018; an expanded tier of the service, Nintendo Switch Online + Expansion Pack, was released on October 25, 2021.
Nintendo Switch Online features include online multiplayer, cloud saving, voice chat via a smartphone app or GameChat, access to special profile pictures, as well as other promotions and offers. The service also includes access to a library of emulated retro games called Nintendo Classics. Nintendo Switch Online + Expansion Pack includes access to additional retro systems' libraries (up to GameCube as of June 2025) and downloadable content for Animal Crossing: New Horizons, Mario Kart 8 Deluxe and Splatoon 2. The Nintendo Switch 2 Edition upgrade packs for The Legend of Zelda: Breath of the Wild and The Legend of Zelda: Tears of the Kingdom were added as additional benefits for Expansion Pack members in June 2025.