NewsWatcher file
File type: Various data file
A .nntp file is a data file associated with NewsWatcher, a Usenet newsreader for Mac computers.
File type category:
Various data file
Date updated: September 22, 2026
NewsWatcher used .nntp files for data related to its Usenet newsreading functions. The files belong to the NewsWatcher application rather than representing a general-purpose interchange format.
NewsWatcher was designed for Apple's Mac platform, including Mac OS X. It is legacy software, so the format is unlikely to be used by current newsreader applications.
Open the .nntp file with NewsWatcher on a compatible Mac. The file may not open meaningfully as a standalone document because it is application data.
Current macOS versions may not run the legacy NewsWatcher software. Avoid renaming the file or opening it in an unrelated application if it belongs to a NewsWatcher data folder.
If the file contains readable news content, use NewsWatcher to view or save that content in a more portable form; otherwise, keep the original file with its NewsWatcher data.
Software applications that handle other tasks involving nntp files:
Apple macOS / Mac OS X
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