Depending on your operating system and specific needs (like multi-monitor support or blue light filtering), here are the best options to download today: Desktop Dimmer - an Open-Source Screen Dimmer App

Staring at a bright computer screen for hours can cause eye strain, headaches, and even disrupted sleep patterns. If your monitor's built-in controls don't go low enough, a dedicated can provide the "darker-than-dark" settings you need to work comfortably in low-light environments. Top Tools to Download for Desktop Dimming