What is .HJT file extension?
File created by TreePad 6 or earlier personal information management software; contains a set of documents structured as a hierarchy of "nodes;" supports text, images, hyperlinks, structured data, and other personal content for each node.
NOTE: TreePad 7 and later use the .TPD file extension, but can still open HJT files.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.