Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .hhk

1 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .hhk file?
  • Which program can create the .hhk file?
  • Where can you find a description of the .hhk format?
  • What can convert .hhk files to a different format?
  • Which MIME-type is associated with the .hhk extension?
HTML Help Index .hhk file icon

HTML Help Index

HHK file is a HTML Help Index. HTML Help is a Microsoft proprietary online help format, consisting of a collection of HTML pages, an index and other navigation tools.
Detailed description not available
Category: Development files
Application: Microsoft HTML Help
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Windows Help File
Hypertext Markup Language Document
Compiled HTML Help
HTML Help Table of Contents
HTML Help AutoIndex
HTML Help Project
HTML Help Stop Words
Microsoft Sharepoint Site Template
HTML Help Collection

Other types of files may also use the .hhk file extension. If you have helpful information about .hhk extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Hex Workshop Bookmark File
HTK Format Parameter File
HTML Help Header File
Myst Game Data
HHsearch Database
C++ Header File
ASCA GIS Housekeeping Data
HTML-Kit Help File
Hallmark Card Studio Document

The .hhk filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

hbk (1), htk (1), hkh (1), hhm (1), hh (1), mhk (1), hmk (1), hk (1), hhl (1)

Can't open a .hhk file?

If you want to open a .hhk file on your computer, you just need to have the appropriate program installed. If the .hhk association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.hhk

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android

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