A daily updated filename extension database!

HHH file extension

The table below provides useful information about the .hhh file extension. It answers questions such as:

  • What is the .hhh file?
  • What program do I need to open a .hhh file?
  • How can the .hhh file be opened, edited or printed?
  • How can I convert .hhh files to another format?

We hope you find this page helpful and a valuable resource!

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

✅ 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.
HHH format description not yet available
Application: Power C Compiler
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
HHH aliases:
HHH related links:
HHH related extensions:
C Source Code

C Header File


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
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
HHH aliases:
HHH related links:
HHH related extensions:

Other types of files may also use the .hhh file extension.

🚫 The .hhh file extension is often given incorrectly!

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

hgh, hh, hhb, hhm, hht, hnh, huh, jhh, uhh

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

C++ Header File
Star Wars: Tie Fighter High Score Data
IdeaMax Document
HydroCAD Unit Hydrograph Definitions
HTML Help Header File
Tetris Online Poland Game Data
LIGPLOT Hydrogen-bonds Data
Eurotherm Hydra History Data
HHsearch Database
Eurotherm 6100a Binary Data

🔴 Can't open a .hhh 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 cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .hhh file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .hhh file extension, write to us!

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