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Trusted file extension guides and opening help from the original project since 2008.

How to open .CML files on Windows

To open .CML files on Windows, right-click the .cml file and choose open with..

Step-by-step instructions

  1. Right-click the .CML file and choose Open with.
  2. Select a trusted Windows app that supports .CML files.

Recommended software

  • VS Code
  • Notepad++/TextEdit
  • jq (CLI)

Alternative methods

  • Open .CML in a browser-based viewer if desktop apps fail.
  • Try opening .CML on Windows with a secondary app to rule out app-specific issues.
  • Convert .CML only with trusted tools when direct opening is not possible.

Common issues

.CML file does not open

This usually means the required app is missing or the .CML file is incomplete.

  1. Install or update a compatible application.
  2. Verify the file came from a trusted source and was fully downloaded.
  3. Try opening the file in an alternative app on another platform.

Security note

Only open .CML files from trusted senders.

Back to .CML extension page