Blackscreen.onl is a lightweight, browser-based display management tool designed to help users reduce energy consumption and extend monitor lifespan. With one click, activate a completely black screen—ideal for OLED displays, where black pixels require no power, effectively conserving energy. This tool supports users focused on sustainability, minimizing carbon footprint, and enjoying a minimalist interface without installations or clutter. Whether you're optimizing for eco-friendly usage, enhancing screen longevity, or reducing blue light exposure at night, BlackScreen.onl offers a smart, efficient solution.