Top 8 C++ json-parser Projects

json

27 35,084 7.7 C++

JSON for Modern C++

Project mention: It is either a clever technique or a sad failure | /r/ProgrammerHumor | 2023-05-14

Here is one popular C++ library (nlohmann/json) removing its use.
FlatBuffers

22 20,530 8.8 C++

FlatBuffers: Memory Efficient Serialization Library

Project mention: Anyone has experience with reverse engineering flatbuffers? | /r/REGames | 2023-05-25

Much more in the discussion of this particular issue onGitHub: flatbuffers:Reverse engineering #4258
InfluxDB

www.influxdata.com
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simdjson

22 16,944 7.0 C++

Parsing gigabytes of JSON per second

Project mention: Any fresh jvm21 benchmarks ? | /r/java | 2023-05-21

I expect a lot of transcoders will be rewritten when the Vector instructions land. You can see speedups when used in other languages, such as simdjson. Please try to be more thoughtful and not disregard other people's hard work so easily.
jsoncons

1 589 6.5 C++

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

Project mention: What is the best way to store data? | /r/cpp_questions | 2023-05-20
python-rapidjson

0 481 5.9 C++

Python wrapper around rapidjson
daw_json_link

9 368 7.9 C++

Fast, convenient JSON serialization and parsing in C++

Project mention: Has Boost lost its charm? | /r/cpp | 2023-04-27

They might have good luck with https://github.com/beached/daw_json_link it has support for stuff like JSON lines and alike plus other ways that only use as much ram as their underlying data structures do as it parses directly to the user DS. Plus it has an iterator/range interface for things like arrays if needed.
jxc

5 61 10.0 C++

JXC is a structured data language similar to JSON, but with a focus on being expressive, extensible, and human-friendly.

Project mention: Literally | /r/ProgrammerHumor | 2023-05-23

You're free to extend it yourself or use an existing extension if it's such a sticking point lol. Hell, the one I linked has strongly typed datetimes.
Sonar

www.sonarsource.com
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gaenari

0 15 1.3 C++

c++ incremental decision tree

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-05-25.