.tm file: how to open it on Windows

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

• 
  Notepad3

  Notepad like text editor based on the Scintilla source code.

  Free 7.26.602.1 84.4K ↓ ★ 6.7K
• 
  Netron

  Visualizer for neural network, deep learning, and machine learning models

  Open source 9.2.8 ★ 33.6K
• 
  Mogan STEM

  A structured editor based on GNU TeXmacs

  Open source 2026.3.7 ★ 579

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