Display Dimmer lets you control the brightness of your external monitors from one place.

Adjust any connected display right from Windows—no more reaching behind the screen or digging through on-screen menus.

Key features

• DDC/CI hardware brightness with safe GPU gamma fallback

• Per-monitor brightness and contrast control (external displays)

• Built for multi-monitor setups (docks, dual/triple screens)

• Schedules and app rule profiles for automatic brightness changes

• Remembers your preferred brightness per display

• Start with Windows and reapply brightness on launch

• Tray icon for instant access

• Light and dark themes

• Lightweight native WPF app — responsive and memory-efficient

Schedules and per-app rules

The free edition includes 1 scheduled rule and 1 app rule for All Displays.

Display Dimmer Pro (optional one-time upgrade) unlocks unlimited rules, including per-display rules, plus additional themes and more advanced controls.

How it works

• Uses DDC/CI (when supported) to send brightness commands directly to the monitor

• Falls back to safe GPU-based dimming when hardware control isn’t available or causes flicker

• Lets you disable DDC/CI per monitor for best compatibility

Notes

• DDC/CI support depends on your monitor and may need to be enabled in the monitor’s settings

• Some advanced features require Display Dimmer Pro