https://github.com/open-source-parsers/jsoncpp
A C++ library for interacting with JSON.
https://github.com/open-source-parsers/jsoncpp
Last synced: 3 days ago
JSON representation
A C++ library for interacting with JSON.
- Host: GitHub
- URL: https://github.com/open-source-parsers/jsoncpp
- Owner: open-source-parsers
- License: other
- Created: 2014-07-06T00:46:15.000Z (over 11 years ago)
- Default Branch: master
- Last Pushed: 2026-03-20T00:59:27.000Z (16 days ago)
- Last Synced: 2026-03-31T14:17:39.702Z (4 days ago)
- Language: C++
- Size: 2.96 MB
- Stars: 8,834
- Watchers: 318
- Forks: 2,730
- Open Issues: 130
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Security: SECURITY.md
- Authors: AUTHORS
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README
# JsonCpp
[](https://conan.io/center/recipes/jsoncpp)
[](https://github.com/open-source-parsers/jsoncpp/blob/master/LICENSE)
[](http://open-source-parsers.github.io/jsoncpp-docs/doxygen/index.html)
[](https://coveralls.io/github/open-source-parsers/jsoncpp?branch=master)
[JSON][json-org] is a lightweight data-interchange format. It can represent
numbers, strings, ordered sequences of values, and collections of name/value
pairs.
[json-org]: http://json.org/
JsonCpp is a C++ library that allows manipulating JSON values, including
serialization and deserialization to and from strings. It can also preserve
existing comment in deserialization/serialization steps, making it a convenient
format to store user input files.
## Project Status
JsonCpp is a mature project in maintenance mode. Our priority is providing a stable,
reliable JSON library for the long tail of C++ development.
### Current Focus
* **Security:** Addressing vulnerabilities and fuzzing results.
* **Compatibility:** Ensuring the library builds without warnings on the latest versions of GCC,
Clang, and MSVC.
* **Reliability:** Fixing regressions and critical logical bugs.
### Out of Scope
* **Performance:** We are not competing with SIMD-accelerated or reflection-based parsers.
* **Features:** We are generally not accepting requests for new data formats or major API changes.
JsonCpp remains a primary choice for developers who require comment preservation and support for
legacy toolchains where modern C++ standards are unavailable. The library is intended to be a
reliable dependency that does not require frequent updates or major migration efforts.
## A note on backward-compatibility
* **`1.y.z` (master):** Actively maintained. Requires C++11.
* **`0.y.z`:** Legacy support for pre-C++11 compilers. Maintenance is limited to critical security fixes.
* **`00.11.z`:** Discontinued.
Major versions maintain binary compatibility. Critical security fixes are accepted for both the `master` and `0.y.z` branches.
## Integration
> [!NOTE]
> Package manager ports (vcpkg, Conan, etc.) are community-maintained. Please report outdated versions or missing generators to their respective repositories.
### vcpkg
Add `jsoncpp` to your `vcpkg.json` manifest:
```json
{
"dependencies": ["jsoncpp"]
}
```
Or install via classic mode: `vcpkg install jsoncpp`.
### Conan
```sh
conan install --requires="jsoncpp/[*]" --build=missing
```
If you are using a `conanfile.txt` in a Conan 2 project, ensure you use the appropriate generators:
```ini
[requires]
jsoncpp/[*]
[generators]
CMakeToolchain
CMakeDeps
```
### Meson
```sh
meson wrap install jsoncpp
```
### Amalgamated source
> [!NOTE]
> This approach may be outdated.
For projects requiring a single-header approach, see the [Wiki entry](https://github.com/open-source-parsers/jsoncpp/wiki/Amalgamated-(Possibly-outdated)).
## Documentation
Documentation is generated via [Doxygen](http://open-source-parsers.github.io/jsoncpp-docs/doxygen/index.html).
Additional information is available on the [Project Wiki](https://github.com/open-source-parsers/jsoncpp/wiki).
## License
JsonCpp is licensed under the MIT license, or public domain where recognized.
See [LICENSE](./LICENSE) for details.