>> HKK file

HKK file format description

Many people share .hkk files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .hkk file can be edited, converted or printed with. On this page, we try to provide assistance for handling .hkk files.

1 filename extension(s) found in our database.

.hkk - HTML Help AutoIndex

The HKK development files are related to Microsoft HTML Help. HKK file is a HTML Help AutoIndex. HTML Help is a Microsoft proprietary online help format, consisting of a collection of HTML pages, an index and other navigation tools.

Microsoft HTML Help
Development files
- / -
HTML Help AutoIndex related extensions:
BASIS Binary Resource Data
BASIS ASCII Resource Data
Doxygen Data
Doxygen Document Set File
BASIS GUIBuilder Control Data
Visual C# Compiler Incremental Data

Naturally, other applications may also use the .hkk file extension. Even harmful programs can create .hkk files. Be especially cautious with .hkk files coming from an unknown source!

Can't open a .hkk file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


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 one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .hkk file extension is often given incorrectly!

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

bkk, hmk, hkm, hk, kk, hlk, hkl

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

ASCA GIS Housekeeping Data
SHELX Reflection Data
Havok Movie File
Warhammer 40000: Dawn of War 2 Animation
Hallmark Card Studio Document
SyncCrypt Ransomware Encrypted Data

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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