Monitorian is an open-source Windows desktop tool designed to adjust the brightness and contrast of multiple monitors individually or in unison. Operating under the MIT license, it offers a lightweight, ad-free experience without tracking.

Technical Overview of Monitorian

Monitorian communicates directly with external displays via the DDC/CI protocol and Windows APIs to query device capabilities and control brightness levels. It installs through an MSI installer, the Microsoft Store, or winget, with extraction options for custom directory placement. Being an open-source WPF utility, it provides a transparent, local environment free of third-party telemetry.

Core Features of Monitorian

Multi-display brightness control allows setting luminance for internal panels and up to four DDC/CI external screens simultaneously or individually.
Unison adjustment mode synchronizes brightness shifts across all connected monitors while adapting to ambient light sensor inputs.
Adjustable range configuration lets users define custom minimum and maximum thresholds for brightness and contrast per monitor.
Precision touchpad integration enables quick horizontal two-finger swiping to adjust screen levels without opening deep menus.

System Compatibility

Requires Windows 7 or newer with .NET Framework 4.8 and DDC/CI-enabled external monitors.