The first C++ JSON library that appears when you google it is a single header file. https://github.com/nlohmann/json https://github.com/nlohmann/json I know b

The first C++ JSON library that appears when you google it is a single header file. https://github.com/nlohmann/json https://github.com/nlohmann/json I know because I used it years ago in school. One of the fastest libraries (https://github.com/miloyip/nativejson-benchmark#parsing-time https://github.com/miloyip/nativejson-benchmark#parsing-time) is also header-only and compares its speed to strlen. https://github.com/Tencent/rapidjson https://github.com/Tencent/rapidjson