Ecosystem

The projects below build on top of nlohmann::json rather than merely using it - schema validators, language bindings, format converters, and similar building blocks. The list is not exhaustive, and is curated rather than automatically generated. If you maintain or know of a project that belongs here, please let me know.

For products, applications, and organizations that use the library, see Customers instead.

Schema validation

• json-schema-validator, a JSON Schema (draft 7) validator with human-readable error messages

Serialization and reflection

• nlohmann_json_reflect, a reflection extension for (de)serializing nested containers-in-structs-in-containers

Encodings

• base-encode-decode, a header-only Base64/32/16/8/4/2 (and DNA/RNA) encoding library, with an adapter that serializes binary data through nlohmann::json

Language bindings and interop

• pybind11_json, a bidirectional type caster between nlohmann::json and Python objects for pybind11 bindings
• nanobind_json, the same idea for nanobind bindings
• nlohmann_json_qt, deserialization helpers for Qt types (QString, QUrl, QDateTime, QVector, ...) from nlohmann::json
• vulkan2json, serialization and deserialization of Vulkan API structs

Format converters

• tojson, a header-only converter between YAML/XML documents and nlohmann::json
• json2xml, a header-only converter from nlohmann::json to XML for simple configuration documents