nlohmann/json

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Design goals

Sponsors

🙋 Priority Sponsor

🏷️ Named Sponsors

Further support

Support

Quick reference

Examples

Read JSON from a file

Creating json objects from JSON literals

JSON as a first-class data type

Serialization / Deserialization

To/from strings

To/from streams (e.g., files, string streams)

Read from iterator range

Custom data source

SAX interface

STL-like access

Conversion from STL containers

JSON Pointer and JSON Patch

JSON Merge Patch

Implicit conversions

Arbitrary types conversions

Basic usage

Simplify your life with macros

Example usage of macros

How do I convert third-party types?

How can I use get() for non-default constructible/non-copyable types?

Can I write my own serializer? (Advanced use)

Specializing enum conversion

Binary formats (BSON, CBOR, MessagePack, UBJSON, BJData, and BON8)

Zero-copy views

Customers

Ecosystem

Supported compilers

Integration

CMake

External

Embedded

Embedded (FetchContent)

Supporting Both

Package Managers

Pkg-config

License

Contact

Security

Thanks

Used third-party tools

Notes

Standards compliance

Character encoding

Comments in JSON

Trailing commas

Order of object keys

Memory Release

Further notes

Execute unit tests

Creating `json` objects from JSON literals

How can I use `get()` for non-default constructible/non-copyable types?