BlueJ information file
File type: Document file
A .ctxt file is an information file used by the BlueJ integrated development environment for Java programming.
It stores class-related information, including documentation, for a BlueJ project.
File type category:
Document file
Date updated: October 6, 2026
BlueJ is a Java integrated development environment developed by the University of Kent. It is available for Windows, macOS and Linux and is primarily used for learning and teaching Java programming.
A .ctxt file is a supporting file in a BlueJ project. It contains information about Java classes, such as documentation and other details that BlueJ uses when displaying and working with the project.
The file is project metadata rather than Java source code or a general-purpose document. The format is intended for use by BlueJ and is not a standard interchange format.
Open the project containing the .ctxt file in BlueJ. BlueJ reads these supporting files as part of the project; they are not normally opened as standalone documents.
BlueJ is available for Windows, macOS and Linux.
There is no standard or useful conversion for a .ctxt file. It is BlueJ project metadata rather than an independent document format.
Keep the file with its BlueJ project. If the information is needed in another form, use BlueJ's project and documentation features rather than converting the file directly.
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