.nupkg file: how to open it on Windows

2 Windows apps register the .nupkg extension. Install one of them to open the file with a double-click.

• 
  NanaZip

  The 7-Zip derivative intended for the modern Windows experience.

  Open source 7.0.1882.0 506.5K ↓ ★ 16K
• 
  NanaZip Preview

  The 7-Zip derivative intended for the modern Windows experience.

  Open source 7.0.1800.0 ★ 16K

Related guide: Change the default app for a file type in Windows