Updated: April 17, 2012
Applies To: Windows Vista, Windows Server 2008, Windows Server 2012, Windows 8
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.
Specifies the file name extension.
Specifies the file type to associate with the specified file name extension.
Displays help at the command prompt.
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.
To view the current file type association for the file name extension .txt, type:
To remove the file type association for the file name extension .bak, type:
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: