WindowTabs

Simplify your Windows desktop with WindowTabs, a free and portable utility. It applies a tabbed interface to most applications, including File Explorer, Office, PDF readers, WeChat, and text editors. Quickly combine windows into tab groups, drag tabs to merge them, and toggle between tasks with one click. As an open-source, lightweight tool, it reduces taskbar clutter and enhances efficiency when working across multiple programs—just download and run, no setup needed.