This study presents a novel solar desalination device that efficiently and scalably produces desalinated water using graphene oxide (GO) films. The device features a confined 2D water path, which minimizes heat loss and ensures efficient water supply. The GO film, fabricated through a scalable process, serves as an efficient solar absorber (>94%), vapor channel, and thermal insulator. The device operates under one-sun illumination, achieving an energy transfer efficiency of 80% and a salinity decrement of four orders. Notably, the device's performance is independent of the water quantity and does not require thermal insulation, making it a promising portable and personalized clean water solution for addressing global water scarcity. The study highlights the importance of localized heat management and efficient water supply in solar desalination, demonstrating a scalable and sustainable approach to water purification.This study presents a novel solar desalination device that efficiently and scalably produces desalinated water using graphene oxide (GO) films. The device features a confined 2D water path, which minimizes heat loss and ensures efficient water supply. The GO film, fabricated through a scalable process, serves as an efficient solar absorber (>94%), vapor channel, and thermal insulator. The device operates under one-sun illumination, achieving an energy transfer efficiency of 80% and a salinity decrement of four orders. Notably, the device's performance is independent of the water quantity and does not require thermal insulation, making it a promising portable and personalized clean water solution for addressing global water scarcity. The study highlights the importance of localized heat management and efficient water supply in solar desalination, demonstrating a scalable and sustainable approach to water purification.