File Extension W File Format Applause Word Chart W stands for Applause Word Chart. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question How can Word use the additional fields of a lookup column? Microsoft Word How do I embed a Google spreadsheet into a Google document?