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emoacht/Monitorian

A Windows desktop app that adjusts brightness and contrast of multiple monitors, including external ones, via DDC/CI.

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What is it?

Monitorian is a Windows desktop tool for changing the brightness of several monitors from one window. It works with external monitors that support DDC/CI, letting you adjust each display individually or move all sliders in unison. On systems with an ambient light sensor, it can show the adjusted brightness alongside the configured value.

Beyond brightness, you can set the adjustable range for brightness and contrast on each monitor. The Microsoft Store version offers add-on features on a subscription basis, including hot keys, command-line control for brightness, contrast, color temperature preset and input source, and conditional, time-based and key commands.

The app requires Windows 7 or newer and .NET Framework 4.8. A monitor is shown only if it responds to DDC/CI capability queries, and the project includes logs and a hidden diagnostic menu to help investigate monitors that do not appear.

Key features

  • 01Adjust brightness of multiple monitors individually or in unison
  • 02Adjust brightness and contrast ranges per monitor
  • 03Show adjusted brightness alongside configured value on systems with an ambient light sensor
  • 04Control brightness through command-line options and Task Scheduler (add-on)
  • 05Supports multiple UI languages

Use cases

  • Adjusting brightness of several external monitors on a Windows PC from one place
  • Automating brightness changes on a schedule with Task Scheduler
  • Binding brightness changes to keyboard shortcuts or scripts

Quick start

  1. 1

    Install via Winget from the Microsoft Store source

    winget install Monitorian -s msstore
  2. 2

    Or download the installer from the releases page

  3. 3

    Launch Monitorian and adjust brightness of your monitors

Things to know

  • Windows only, requiring Windows 7 or newer and .NET Framework 4.8.
  • External monitors must support DDC/CI, which is not available on every model or connector.
  • Hotkeys, command-line options and scheduled commands are add-on features on a Microsoft Store subscription basis.

In collections

Windows apps and utilities

Topics

#brightness#ddc-ci#monitor#display#windows#wpf#csharp#luminance

FAQ

What is Monitorian?
A Windows desktop app that adjusts brightness and contrast of multiple monitors, including external ones, via DDC/CI. Monitorian is a Windows desktop tool for changing the brightness of several monitors from one window. It works with external monitors that support DDC/CI, letting you adjust each display individually or move all sliders in unison. On systems with an ambient light sensor, it can show the adjusted brightness alongside the configured value.
Is Monitorian free to use? What license does it have?
Monitorian is open source under the MIT license. Check the license terms before using it in commercial products.
Is Monitorian still maintained?
Actively maintained. The last commit to Monitorian was on Nov 2, 2026.
What can I use Monitorian for?
Adjusting brightness of several external monitors on a Windows PC from one place Automating brightness changes on a schedule with Task Scheduler Binding brightness changes to keyboard shortcuts or scripts
How do I install Monitorian?
Install via Winget from the Microsoft Store source: winget install Monitorian -s msstore Or download the installer from the releases page Launch Monitorian and adjust brightness of your monitors
Where can I get Monitorian?
The source code and installation instructions are on GitHub: https://github.com/emoacht/Monitorian

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