Overview

• Nano11 publicly ships as a PowerShell-based script that prunes official Windows 11 install media, yielding ISOs up to about 3.5 times smaller than stock (example: 7.04 GB to 2.29 GB).
• Installed footprints can drop to 2.8 GB when starting from Windows 11 LTSC and applying LZX compression, with additional steps like running Compact and removing the pagefile.
• The resulting builds are not serviceable, meaning no Windows Update or post-install additions of languages, drivers, or features, and they are not recommended for daily use.
• The tool targets controlled scenarios such as virtual machines, development testbeds, or embedded environments where a minimal, static OS is acceptable.
• NTDEV says the script works across SKUs including Home, Pro, and LTSC, though the best size reductions are shown on LTSC and the compression process demands significant time and RAM.