open-source-parsers/jsoncpp

★ 8,837C++Audience · developerComplexity · 2/5LicenseSetup · easy

Mindmap

mindmap
  root((jsoncpp))
    What it does
      Parse JSON text
      Write JSON text
      Preserve comments
    Tech stack
      C++ 11 or later
      CMake build
      vcpkg Conan Meson
    Use cases
      Config files
      Data exchange
      C++ integration
    Audience
      C++ developers
      System builders
    License
      MIT permissive

mindmap root((jsoncpp)) What it does Parse JSON text Write JSON text Preserve comments Tech stack C++ 11 or later CMake build vcpkg Conan Meson Use cases Config files Data exchange C++ integration Audience C++ developers System builders License MIT permissive

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Things people build with this

USE CASE 1

Embed JSON parsing in a C++ application using a stable, widely packaged library.

USE CASE 2

Store human-editable config files that preserve comments across reads and writes.

USE CASE 3

Add JSON support to a C++ project via vcpkg, Conan, or a generated single-file drop-in.

Tech stack

C++CMakevcpkgConanMeson

Getting it running

Difficulty · easy Time to first run · 30min

Available via vcpkg, Conan, Meson, or as a generated single-file include, no special infrastructure required.

Use freely for any purpose, including commercial use, as long as you keep the copyright notice.

In plain English

JsonCpp is a C++ library that lets programs read and write JSON data. JSON is a text format widely used to exchange information between systems, storing things like lists of values, key-value pairs, and numbers or strings. JsonCpp handles converting that text into data your program can work with, and converting it back to text when you need to save or send it. One feature that sets JsonCpp apart from similar libraries is that it can preserve comments when reading and writing JSON files. This makes it practical for storing configuration files that humans need to edit, since comments are normally stripped out by most JSON tools. The project is in maintenance mode, which means the team is focused on keeping it stable and secure rather than adding new capabilities. Active work covers fixing security issues found through testing, ensuring the library compiles cleanly on recent versions of common C++ compilers, and fixing any bugs that cause incorrect behavior. New features and performance improvements are explicitly out of scope. There are two supported versions. The current main version requires a C++ standard from 2011 or later. An older branch supports compilers that predate that standard, but only receives critical security fixes. The library is available through several common C++ package managers including vcpkg, Conan, and Meson, or you can generate a single-file version to drop directly into your project. JsonCpp is licensed under the MIT license, meaning it can be used freely in both open and closed-source projects.

Copy-paste prompts

Prompt 1

Show me how to parse a JSON string in C++ using JsonCpp and print all top-level key-value pairs.

Prompt 2

Write a C++ function that reads a JSON config file with comments using JsonCpp and updates a value without stripping the comments.

Prompt 3

How do I integrate JsonCpp into a CMake project using vcpkg? Give me the CMakeLists.txt snippet.

Prompt 4

Generate a C++ example using JsonCpp that serializes a struct to a JSON file and reads it back.

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