New Release — Powered by Tauri v2 & Rust

Windows Screen Brightness
Precise, Fast & Seamless

True hardware-level brightness control for both internal laptop panels (WMI) and external monitors (DDC/CI). Engineered with Windows 11 Fluent UI and instant system tray flyout access.

Download for Windows (v0.1.0) View on GitHub

Requires: Windows 10 (1809+) or Windows 11 • Ultra-lightweight ~6MB • 100% Free & Open Source (MIT)

DDC/CI + WMI

True Hardware Control

< 12 MB

Ultra-Low RAM Footprint

Fluent UI

Windows 11 Native Aesthetic

100% MIT

Free & Open Source

Engineered for Clarity & Control

No artificial software dimming overlays. Brightness Control communicates directly with your display hardware controller.

🔌

DDC/CI & WMI Hardware Control

Seamlessly control internal laptop displays via native WMI and external monitors over HDMI / DisplayPort via the DDC/CI standard (VCP code 0x10).

⚡

Rust & Tauri v2 Engine

Launches instantly with an exceptionally small footprint (~8–12MB RAM in the background). Completely free of heavy Chromium or Electron bloat.

🎨

Windows 11 Fluent UI

Matches Windows 11 with subtle Mica/Acrylic translucency, smooth slider curves, and automatic system Light & Dark mode adaptation.

📌

Smart System Tray Flyout

Click the system tray icon to reveal a sleek quick-slider panel modeled after the native Windows 11 volume and brightness flyouts.

🎛️

Unified Master Slider

Automatically activates when two or more displays are connected, letting you synchronize brightness across your entire workspace in one drag.

🛡️

Black-Screen Protection

Enforces a 10% minimum brightness floor so you never accidentally dim a screen to total darkness with no way to navigate back.

Frequently Asked Questions

Everything you need to know about compatibility, setup, and features.

Why is my external monitor not responding to brightness changes?

1. Enable DDC/CI in OSD: Open your monitor's On-Screen Display (OSD) menu using its physical buttons, locate the DDC/CI setting, and ensure it is turned On.
2. Check Video Cable: Connect your monitor directly via HDMI or DisplayPort. Some low-quality USB-C hubs, docking stations, or KVM switches filter out DDC/CI I2C signals.

Can the app automatically launch when Windows boots?

Yes! You can enable "Start with Windows" in the Settings panel. When enabled, the application starts quietly minimized in your system tray without interrupting your startup routine.

What keyboard shortcuts and presets are supported?

- F5: Rescan and refresh connected displays.
- Esc: Minimize immediately to the system tray.
- Quick preset buttons (25%, 50%, 75%, 100%) and ±5% stepper buttons on each display card.

Is Brightness Control safe and free to use?

Yes, Brightness Control is 100% free and open-source under the permissive MIT License. There are zero ads, telemetry trackers, or external data collection. The entire codebase is transparent and inspectable on GitHub.

Windows Screen Brightness Precise, Fast & Seamless