.TPD File Extension
File Type 2TreePad 7 Database File
.TPD File Association 2
File created by TreePad 7 or later, a personal information manager; stores information that is structured as a hierarchy of "nodes," each of which stores document content such as text, images, hyperlinks, structured data, and other personal content.
Prior to TreePad 7, the software used the .HJT file extension for databases.
NOTE: Freebyte.com TreePad has been discontinued.