H File Type

- The quick facts

What are H files and how to open them

Are you having problems opening a H file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a H file?

Files that contain the .h file extension are normally header files used with the C or C++ programming languages. .h files are commonly known by programmers as "header files". They may contain constants, function prototypes and external variable definitions.

The header files are included by source code files that need to use the constants or functions defined in the header file. For example, if you define a text string with your company name in a header file, this constant can be used everywhere you need to display or otherwise use the company name in your source code. Should you later decide to change the name, you only have to do it in the header file and recompile to make the change take effect everywhere.

How to open H files

Important: Different programs may use files with the H file extension for different purposes, so unless you are sure which format your H file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested 10 different H openers which you will find listed below.

Last updated: January 25, 2022

Suggest another file format using extension H

While we know of one file format using the .H file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .H file.

Various apps that use files with this extension

These apps are known to open certain types of H files. Remember, different programs may use H files for different purposes, so you may need to try out a few of them to be able to open your specific file.

WinRARWinRARUser submitted
CodeBlocksCodeBlocksUser submitted
Dev-C++Dev-C++User submitted
UltraEditUltraEditUser submitted
Stuffit ExpanderStuffit ExpanderUser submitted
Atmel StudioAtmel StudioUser submitted
Code::BlocksCode::BlocksUser submitted
Borland C++Borland C++User submitted
Edge Code CCEdge Code CCUser submitted
jGRASPjGRASPUser submitted
We have not verified any software that we know for certain will work with H-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with H-files. If you know one, please use the 'Suggest a program' link below and tell us about it!