What is a CWK file?
A .CWK file is a ClarisWorks Document. Apple created this file format for ClarisWorks, an early office suite. Later, Apple updated and renamed the software to AppleWorks. A .CWK file can contain a word processing document, a spreadsheet, a drawing, a database, or a presentation. Because this software is now obsolete, modern computers cannot open these files natively.
How to open CWK files?
To open a .CWK file offline, you normally need vintage software like AppleWorks 6 or earlier versions of Apple Pages and Numbers. Modern versions of macOS and Windows do not support these files by default.
However, viewer.online/cwk analyzes .CWK files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. This allows you to inspect the contents without finding a vintage computer.
Best practices and troubleshooting
Because a .CWK file has multiple possible meanings—ranging from text to vector drawings—we recommend using viewer.online/cwk to identify the actual format of the user's file.
If you need to edit the document, you should migrate it to a modern standard. We recommend file conversion to sensible target formats like .DOCX, .PDF, or .TXT on convert.guru. For offline troubleshooting, you can also try LibreOffice, an open-source suite that uses the `libmwaw` library to import older Mac formats.
Summary
viewer.online/cwk directly opens and previews .CWK files in the browser, eliminating the need to install software or troubleshoot compatibility issues.