Top 8 C++ json-parser Projects

json

93 40,239 7.7 C++

JSON for Modern C++

Project mention: Learn Modern C++ | news.ycombinator.com | 2023-12-26

I have not done a "desktop" program in 25+ years and never using C++ (or C), since then I'm mostly a web developer (PHP,Elixir, JS, Kotlin etc).
I'm currently doing a C++ audio plugin with the Juce framework.
This website has been a good resource, alongside https://www.learncpp.com
But I was actually close to give up before using those two things:
- https://github.com/nlohmann/json : my plugin use a json api backend and the Juce json implementation is atrocious (apparently because of being born in previous c++ version), but this library is GREAT.
- ChatGPT 4. I'm not sure I would have "succeeded" without it, at least not in a reasonable time frame. ChatGPT 3.5 is slow and does not give good results for my use case but 4 is impressive. And I use in a very dumb way, just posing question in the web UI. I probably could have it directly in MSVC?
Also I must say, for all its flaws, I have a renewed appreciation for doing UI on the web ;)

FlatBuffers

48 22,048 8.7 C++

FlatBuffers: Memory Efficient Serialization Library

Project mention: FlatBuffers – an efficient cross platform serialization library for many langs | news.ycombinator.com | 2023-09-18

InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
simdjson

65 18,362 9.2 C++

Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks

Project mention: Tips on adding JSON output to your command line utility. (2021) | news.ycombinator.com | 2024-04-20

It's also supported by simdjson [0] (which has a lot of language bindings [1]):
> Multithreaded processing of gigantic Newline-Delimited JSON (ndjson) and related formats at 3.5 GB/s
[0] https://simdjson.org/
[0] https://github.com/simdjson/simdjson?tab=readme-ov-file#bind...

jsoncons

3 667 9.9 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: Experience using crow as web server | /r/cpp | 2023-11-06

On the other hand, I'd like to bring in the json library of my choice, e.g. https://github.com/nlohmann/json or https://github.com/danielaparker/jsoncons. So I'd prefer the web server library provides as little as possible in the way of Json support, and certainly doesn't get in the way of using my library of choice. Similarly, I'd like to use my choice of automatic object serialization.

python-rapidjson

1 492 7.5 C++

Python wrapper around rapidjson
daw_json_link

21 424 8.6 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 62 0.0 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.

WorkOS

workos.com sponsored

The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
gaenari

1 24 0.0 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).