.fmt file: how to open it on Windows

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

About the format

Format

Lotus 1-2-3 Spreadsheet Formatting File

PRONOM identifier

x-fmt/331

Format data: freedesktop.org shared-mime-info and PRONOM (The National Archives, UK).

• 
  OpenMPT

  A powerful audio application that makes writing music fun, easy and efficient.

  Open source 1.32.11.00 19.4K ↓ ★ 790
• 
  Winamp

  The legendary Winamp desktop player for Windows

  Proprietary 5.92.0.10042 47.1K ↓

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