Claris user dictionary file
File type: Various data file
A .cudt file is a Claris user dictionary file. It stores user-added dictionary data, such as custom words used for spelling checks.
File type category:
Various data file
Date updated: September 28, 2026
The CUDT file extension is associated with Claris. CUDT files contain user dictionary data used to supplement an application's built-in spelling dictionary.
This is a legacy format associated with older Claris software and is normally intended for use by the application that created it rather than for direct editing.
A CUDT file is normally used by the Claris application that created it rather than opened as a standalone document. Open it with compatible legacy Claris software if that software recognizes the file as a user dictionary.
Current applications may not support this format, so the original Claris software may be required.
CUDT files contain user dictionary data rather than conventional document content, so they may not have a useful direct conversion to another document format.
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