The assoc command displays or modifies file name extension associations. If used without parameters, assoc displays a list of all the current file name extension associations.
This command is only supported within cmd.exe and is not available from PowerShell. Though you can use cmd /c assoc as a workaround.
assoc [<.ext>[=[<filetype>]]]
Parameters
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Parameter |
Description |
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<.ext> |
Specifies the file name extension. |
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<filetype> |
Specifies the file type to associate with the specified file name extension. |
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/? |
Displays help at the command prompt. |
Remarks
To remove the file type association for a file name extension, add a white space after the equal sign by pressing the SPACEBAR.
To view current file types that have open command strings defined, use the ftype command.
To redirect the output of assoc to a text file, use the > redirection operator.
Examples
To view the current file type association for the file name extension .txt, type:
assoc .txt
To remove the file type association for the file name extension .bak, type:
assoc .bak=
