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

Details of extension .hh

Below, you can find answers to the following questions:

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

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

HTML Help Header File .hh file icon

HTML Help Header File

HH file is a HTML Help Header File. Microsoft HTML Help is the standard help system for the Windows platform. By default, an .hh file is created when the help project is compiled in Help Builder.
Category: Development files
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 Index
HTML Help Project
HTML Help Stop Words
Microsoft Sharepoint Site Template
HTML Help Collection
C++ Header File .hpp file icon

C++ Header File

HPP file is a C++ Header File. C++ is a general-purpose programming language. It is a statically-typed free-form multi-paradigm language supporting procedural programming, data abstraction, object-oriented programming, and generic programming.
Category: Development files
Application: Visual C++
Program name: -
Mime-type: text/plain
Magic bytes (HEX): -
Magic string (ASCII): -
hh, hxx
Related extensions:
Assembly Source Code
C Source Code
C++ Source Code
Visual C++ Dialog
Fortran Source Code
C Header File
Microsoft Visual Studio Workspace Options
Pascal/Delphi Source Code
Visual C# .NET Class

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

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Mercurial Data
GNOME C++ Header
Harwell Boeing Sparse Matrix
WinHelp Context ID
HyperTerminal Settings
Humminbird Track Data
Teli Fax Image
Grasshopper 3D Document
Therion Data

The .hh filename extension is often given incorrectly!

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

hg (12), ht (8), hb (5), mh (4), hm (4), th (3), gh (3), bh (2), nh (2), hj (2)

Can't open a .hh file?

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

Windows can't open this file:

File: example.hh

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, Windows 7, Windows 8, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android

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