HHK file extension

MS HTML Help Index

Run a free instant scan for .HHK file errors

A .HHK file is known as a MS HTML Help Index.

This file extension was added to our database by a visitor to this site, but no further information was provided. We have yet to investigate the HHK file extension any further, or there was simply not enough information available at the time to report accurately on this format.

However, it is possible that other file formats exist that use the HHK extension, so please let us know if you do not think this extension matches the file format you are looking for.