Seelen UI is a free customization layer for Windows 10 and Windows 11 that helps organize windows and adjust the desktop environment. Its automatic tiling manager offers BSPWM, Tall, Wide, and Grid layouts, along with floating, stacked, monocle, and per-app rules. The desktop shell includes a dock, scriptable toolbar, start menu, custom Alt+Tab switcher, and window previews. Background options include MP4 and WebM videos, interactive HTML/CSS/JS, music-synced visuals, and collections assigned by monitor or workspace. Built-in widgets cover media controls, clock and calendar, CPU, RAM, network and disk monitoring, notifications, Wi-Fi, and Bluetooth. Its media module works with most music players for pausing, resuming, and skipping tracks. Documentation covers themes, widgets, plugins, and development, with community help through Discord, repositories, and other channels. Seelen says the app adds a customization layer rather than changing Windows system files or fully replacing the desktop. Modified, debloated, or custom Windows versions are not recommended because removed components or disabled services may cause errors.
Who it is for
It suits Windows users who want more control over window layouts, desktop elements, and backgrounds. The maker names artists, designers, professionals, and curious users as audiences for its tools.
What is good
- Free desktop customization suite.
- Supports multiple tiling layouts and per-app rules.
- Offers video and interactive wallpapers.
- Built-in widgets monitor system and network activity.
- Does not modify Windows system files.
What to know first
- Designed for Windows 10 and Windows 11 only.
- Modified or debloated Windows versions are not recommended.
Verdict
Seelen UI combines window management, desktop controls, widgets, and customizable backgrounds in one Windows layer. Users of modified Windows versions should account for the stated risk of errors or malfunction.
Seelen UI plans and pricing
All plansCompared on start menu customization software
- Free plan
- Yes
- Supported Windows
- both
- Replacement mode
- shell_replacement
- Start button controls
- Yes
- Custom search
- Yes
- Taskbar controls
- extensive