Single Header Libraries

Single header libraries are C or C++ libraries distributed as a single header file, containing all necessary code for implementation. They simplify integration by eliminating complex build systems, as users just include the header to access functionality. This approach is popular for lightweight, portable utilities like JSON parsers, testing frameworks, and data structures.

Also known as: Single-file libraries, Header-only libraries, One-header libraries, Single-header, Header-only

Why learn Single Header Libraries?

Developers should use single header libraries when they need minimal dependencies and quick setup in C/C++ projects, such as for embedded systems, cross-platform tools, or prototyping. They are ideal for small to medium-sized utilities where simplicity and portability outweigh the need for modular compilation or advanced build configurations.

Learning Resources

• docs: Awesome Single Header Libraries
• tutorial: C++ Single Header Libraries Guide
• docs: STB Libraries (Example Collection)
• video: Header-Only Libraries in Modern C++