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CompactGUI 3.8.0, developed by IridiumIO, is a lightweight Windows utility that exposes the operating system’s built-in NTFS compression engine through a graphical interface, enabling users to shrink active games and applications without altering their behavior or relocating files. By invoking the Windows 10/11 compact.exe API transparently, the program compresses executable, library, and asset folders on-the-fly, typically reclaiming 20–60 % of disk space while leaving shortcuts, registry keys, and update mechanisms intact. Gamers commonly deploy it on Steam, Epic, EA App, and GOG libraries to fit large titles such as Call of Duty or Microsoft Flight Simulator onto smaller SSDs, whereas power users apply it to Adobe Creative Suite, Visual Studio, or CAD suites to postpone hardware upgrades on laptops with limited storage. A live dashboard reports original versus compressed size, achieved ratio, and real-time CPU overhead, allowing selective rollback should a title exhibit stutter or longer load times. Since version 1.0, IridiumIO has iterated through eight public builds, progressively adding folder drag-and-drop, multi-threaded queue processing, dark-mode theming, and exclusion filters for anti-cheat drivers that may balk at modified executables. The tool requires no background service and uninstalls cleanly, leaving compression state untouched. CompactGUI is available for free on get.nero.com, with downloads supplied through trusted Windows package channels such as winget, always serving the latest release and supporting batch installation alongside other applications.
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