1.nlohmann / json
JSON for Modern C++
+1,625 stars
from 49,204 · score 7.39
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2.simdjson / simdjson
Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks
+897 stars
from 23,597 · score 6.80
3.danielaparker / jsoncons
A C++, header-only library for constructing JSON and JSON-like data formats, with JSON Pointer, JSON Patch, JSON Schema, JSONPath, JMESPath, CSV, MessagePack, CBOR, BSON, UBJSON, toon-format
+24 stars
from 831 · score 3.22
4.APIDevTools / json-schema-ref-parser
Parse, Resolve, and Dereference JSON Schema $ref pointers in Node and browsers
+15 stars
from 1,098 · score 2.77
5.taocpp / json
C++ header-only JSON library
+12 stars
from 671 · score 2.56