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

How to open .CMP files on Windows

To open .CMP files on Windows, right-click the .cmp file and choose open with..

Step-by-step instructions

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

Recommended software

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

Alternative methods

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

Common issues

.CMP file does not open

This usually means the required app is missing or the .CMP 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 .CMP files from trusted senders.

Back to .CMP extension page