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Top 8 C++ json-parser Projects
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FlatBuffers, also developed by Google, is a highly optimized serialization library designed for scenarios where zero-copy deserialization is required.
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simdjson
Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks
Project mention: Make Ubuntu packages 90% faster by rebuilding them | news.ycombinator.com | 2025-03-18I think parsing once into a faster format (sqlite3 or parquet) would be more beneficial.
https://simdjson.org/
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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
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Project mention: Enum class improvements for C++17, C++20 and C++23 | news.ycombinator.com | 2024-08-04
https://github.com/beached/daw_json_link/blob/release/docs/c... :
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jxc
JXC is a structured data language similar to JSON, but with a focus on being expressive, extensible, and human-friendly.
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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).
C++ json-parser discussion
C++ json-parser related posts
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User-Space Interrupts (2021)
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JSON vs FlatBuffers vs Protocol Buffers
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SIMD < SIMT < SMT: Parallelism in Nvidia GPUs (2011)
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The Simdjson Library
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Tips on adding JSON output to your command line utility. (2021)
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Training great LLMs from ground zero in the wilderness as a startup
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simdjson: Parsing Gigabytes of JSON per Second
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A note from our sponsor - SaaSHub
www.saashub.com | 24 Mar 2025
Index
What are some of the best open-source json-parser projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | json | 44,813 |
| 2 | FlatBuffers | 23,941 |
| 3 | simdjson | 19,960 |
| 4 | jsoncons | 751 |
| 5 | python-rapidjson | 511 |
| 6 | daw_json_link | 484 |
| 7 | jxc | 63 |
| 8 | gaenari | 27 |
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