.h — C/C++ Header File
A header file declaring functions, types, and constants shared between C or C++ source files.
Also known as: .hpp
Safety guidance (not a guarantee)
Source code is plain text and doesn't execute on its own — it has to be compiled or run by a specific tool, which is where any real risk would occur.
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Frequently asked questions
What is a .h file?
A header file declaring functions, types, and constants shared between C or C++ source files.
Can I edit a .h file?
Yes — .h files are commonly editable with software such as Any text editor.
Does having a .h extension mean the file is safe?
No single extension can guarantee that. Source code is plain text and doesn't execute on its own — it has to be compiled or run by a specific tool, which is where any real risk would occur. Always consider where the file came from, not just its name.
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