.tzstd file: how to open it on Windows

2 Windows apps register the .tzstd 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 7.0.1873.0 501.6K ↓ ★ 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