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.CWK File Extension

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File TypeClarisWorks Document

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CategoryData Files


This file is saved in a binary format, which requires a specific program to read its contents.


Document created by Apple's AppleWorks or ClarisWorks productivity suite; can be a word processing document, spreadsheet, or presentation; can still be opened by iWork applications (Pages, Numbers, Keynote), but the file must first be in the AppleWorks 6 format and importing results may vary.

More Information

Apple acquired ClarisWorks in 1998 and renamed it to AppleWorks. Both productivity suites were available in Mac and Windows versions. However, AppleWorks has been discontinued and was last updated in 2004.

Programs that open CWK files
Apple AppleWorks
Apple Pages
Apple Keynote 6.5
Apple Numbers 3.5
Apple AppleWorks
Updated 6/16/2014