BBEdit dictionary file
File type: Various data file
A BDCT file is a dictionary data file used by BBEdit, a text and HTML editor for macOS.
File type category:
Various data file
Date updated: September 28, 2026
BBEdit is a professional text and HTML editor developed by Bare Bones Software for Apple macOS. The BDCT file extension identifies dictionary files associated with the application.
A BDCT file stores dictionary data that BBEdit can use as part of its text-editing features. It is an application support file rather than a normal document intended for independent editing.
BDCT files belong to the macOS version of BBEdit and are normally managed by the application. The format is associated with BBEdit, so its contents may not be usable in other software.
Open a BDCT file on macOS with BBEdit. In normal use, BBEdit accesses the file automatically from its support files, so it usually does not need to be opened manually.
If BBEdit is not installed, the file may not have a useful standalone viewer because it contains application-specific dictionary data.
BDCT files are BBEdit support files and are not normally converted to another format. Keep the original file for use with BBEdit.
Software applications that handle other tasks involving bdct files:
Apple macOS / Mac OS X
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