CWK File Extension
ClarisWorks Document
- File Type cwk
- Developer Apple
- Popularity
- Application FileMaker
- Category Document Files, Spreadsheet Files
- Format Binary
What is a CWK file?
ClarisWorks Document works with the CWK file extension and is classified under Document Files and Spreadsheet Files, with a total of 1082 files.
With the creation of the ClarisWorks Document (CWK), Apple introduced file format along with 72 programs built for their use.
CWK files are compatible with various operating systems, including Mac OS and Windows. You can open a CWK file using one of 3 programs, for example ClarisWorks, FileMaker and icWord.
File Signature
HEX code: 00 42 4F 42 4F. ASCII code: BOBO.
How to open a CWK file?
The most common reason why a CWK file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.
ClarisWorks, FileMaker and icWord are among the most widely used programs for handling CWK files. If you wish to install the latest release of FileMaker, visit the official FileMaker portal and download the edition that works on any operating system.
Following installation, CWK files should be automatically opened with FileMaker.
Set FileMaker as the default CWK application
Change the default app that opens a file on Mac
- Right-click or use Control + Left-click on the desired CWK file to open a menu where you can choose from multiple actions;
- Choose "Open in Application" and click "Other";
- Look at the bottom of the window, where you will see the "Enable" menu. "Recommended Programs" will be selected as the default option;
- Within this menu select "All Programs" and navigate to FileMaker. Check the box next to "Always open in app" to make sure it’s the default option.
Change default programs in Windows
- Start the process by right-clicking on your CWK file and selecting "Open With". From there, click "Choose another app" to continue;
- From the options listed in the pop-up window, specifically choose FileMaker as the application to handle your CWK file;
- Be sure to check the "Always use this app" checkbox and click "OK" to save your preference.
How to edit a CWK file?
To modify CWK files, it is necessary to install dedicated software that lets you open and edit document files. Online CWK editors generally offer fewer tools compared to programs designed for ClarisWorks Document.
Best CWK Editor Software in 2026
Taking into account the provided details, we have prepared a list of CWK editors that match your needs.
| CWK Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| ClarisWorks | Apple | Mac OS | 4.8 out of 5 (41 review) |
Convert files to and from CWK
If a CWK file is cumbersome, converting it to formats such as PDF, CSV, XLS, DOC, XLSX or other supported types can make it easier to manage.
It is important to understand that converting a CWK file might limit certain functions, but this conversion is usually reversible.
Convert CWK to other file formats
Troubleshooting guide for CWK file complications
When issues arise with CWK files, they can generally be fixed with small software tweaks. Use the troubleshooting tips below to help resolve them.
What are the possible solutions to recover a corrupt CWK file?
Start a recovery program, open the damaged CWK file and then select the "Repair" menu item to start the repair procedure. Wait for the recovery process to finish, allowing automatic repair of damaged document files.
How can I confirm if my CWK file has been damaged?
The signs of corrupted CWK document files can manifest as:
- The file shows slow performance when edited in ClarisWorks;
- The file stops responding or freezes in FileMaker or other programs;
- The file does not respond or shows errors when opening it;
- Unexplained CWK file size inflation;
- The file operation is accompanied by the display of error messages;
What are the possible causes of FileMaker crashing?
Lack of regular software updates can cause FileMaker to crash. Make sure you have installed the latest updates for FileMaker products.
Restarting your computer is a crucial troubleshooting measure that can alleviate numerous common problems. Therefore, it is advisable to restart your computer before modifying any settings related to the software.