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Assoc

Published: April 17, 2012

Updated: April 17, 2012

Applies To: Windows 8, Windows Server 2008, Windows Server 2012, Windows Vista

Displays or modifies file name extension associations. If used without parameters, assoc displays a list of all the current file name extension associations.

For examples of how to use this command, see Examples.

Syntax
assoc [<.ext>[=[<FileType>]]]
Parameters

 

Parameter Description

<.ext>

Specifies the file name extension.

<FileType>

Specifies the file type to associate with the specified file name extension.

/?

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= 
noteNote
Be sure to add a space after the equal sign.

To view the output of assoc one screen at a time, type:

assoc | more

To send the output of assoc to the file assoc.txt, type:

assoc>assoc.txt