1.nlohmann / json
JSON for Modern C++
+1,625 stars
from 49,204 · score 7.39
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7 repositories by Attention Score · May 7, 2026 – Nov 2, 2026 (UTC)
2.stephenberry / glaze
Extremely fast, in memory, serialization, reflection, and RPC library for C++. JSON, BEVE, BSON, CBOR, CSV, JSONB, MessagePack, TOML, YAML, EETF
+381 stars
from 2,714 · score 5.95
3.MessagePack-CSharp / MessagePack-CSharp
Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]
+187 stars
from 6,624 · score 5.24
4.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
5.microsurging / surging
Surging is a micro-service engine that provides a lightweight, high-performance, modular RPC request pipeline. support Event-based Asynchronous Pattern and reactive programming.
+11 stars
from 3,252 · score 2.48
6.JujuAdams / SNAP
Data format converters for GameMaker LTS 2022
+5 stars
from 94 · score 1.79
7.PavelKisliak / BitSerializer
Multi-format serialization library for C++17: JSON/JSONC, CSV and MsgPack (dependency-free), plus XML and YAML
+3 stars
from 31 · score 1.39