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

Details of extension .hhh

Below, you can find answers to the following questions:

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

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

Power C Precompiled Header .hhh file icon

Power C Precompiled Header

HHH file is a Power C Precompiled Header. Power C is an ANSI compatible C compiler for DOS that requires very few resources. It can be installed in less than 1 Meg of disk space and will run on any PC that runs DOS 2.0 or later.
Detailed description not available
Category: Development files
Application: Power C Compiler
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
C Source Code
C Header File
STSDAS GEIS Header .hhh file icon


HHH file is a STSDAS GEIS Header. The Space Telescope Science Data Analysis System (STSDAS) is a software package for reducing and analyzing astronomical data.
Category: Data files
Application: STSDAS
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:

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

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

LIGPLOT Hydrogen-bonds Data
C++ Header File
HTML Help Header File
HHsearch Database
Eurotherm Hydra History Data
HydroCAD Unit Hydrograph Definitions
Help and Support Center HHT

The .hhh filename extension is often given incorrectly!

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

hhb (8), hh (3), hhm (3), uhh (2), huh (1), hht (1)

Can't open a .hhh file?

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

Windows can't open this file:

File: example.hhh

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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