A dnn file extension is related to the DotNetNuke and used for its manifest.
Software that open dnn file
DNN file extension - DotNetNuke manifest
What is dnn file? How to open dnn files?
File type specification:
The dnn file extension is associated with the DotNetNuke, a web content management platform for Microsoft .NET framework.
The dnn file stores manifest from the DotNetNuke.
Seems to be obsolete format.
This dnn file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
The default software associated to open dnn file:
Company or developer:
DotNetNuke Corp.
DotNetNuke is the leading Web Content Management Platform for Microsoft .NET, powering more than 600,000 web sites worldwide.
List of recommended software applications associated to the .dnn file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open dnn file, edit dnn file, convert dnn file, view dnn file, play dnn file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with dnn file - DotNetNuke manifest
Click on the software link for more information about DotNetNuke. DotNetNuke uses dnn file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).