Click the "Select File" button above, and choose your HH file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert HH to another file type
To convert HH header files to another format, you need Microsoft Visual Studio or other Developer software.
Convert a file to HH
To convert other file formats to the "Source Code Header" file type, you need software like Microsoft Visual Studio or a similar tool.
About HH files
A .hh file is a source code header file written for the C++ programming language. It contains forward declarations of classes, variables, macros, and functions that serve as the interface for the actual code implementation (usually stored in cpp or cc files).
To view or edit these files natively, developers use code editors and IDEs like Microsoft Visual Studio, Visual Studio Code, or Notepad++. Because it is ultimately a plain text file, it can technically be opened by any basic text utility.
However, users often need to convert .hh files because standard operating systems (like Windows or macOS) do not associate this extension with a default text editor out of the box. Attempting to open it often results in an annoying 'Choose an application' prompt. Furthermore, sharing raw source code files with non-technical clients or managers is frustrating, as they usually lack the software to view it cleanly.
The best workaround is to convert .hh to PDF. A PDF preserves the exact text formatting, spacing, and indentations while making the file universally readable and printable on any device. Alternatively, converting it to TXT ensures it opens instantly on any phone or computer. If your specific compiler toolchain requires standard naming conventions, you may simply need to rename the file to h or hpp.
Many standard online document converters fail to process developer files because they do not recognize the .hh extension. Just drag and drop your file to convert.guru to identify the format, view the source code securely, and convert it when possible into a highly compatible document format.
Convert.Guru analyzes your HH file, detects the exact format, and lets you read the text inside.
If you want to convert HH file to JS, TS, PY, JAVA, CPP, C, CS, PHP, RB, GO, RS or SWIFT, you can use Microsoft Visual Studio or similar software from the "C++ Source Code Declarations" category. In the File menu, look for Save As… or Export….
To convert SH, PY, KT, PS1, SWIFT, LUA, PL, JAVA, SCALA, JS, VBS or TS files to HH, try Microsoft Visual Studio or another comparable tool in the "C++ Source Code Declarations" category.
The HH Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our HH converter.