1.nlohmann / json
JSON for Modern C++
+182 stars
from 50,647 · score 5.21
Trending repositories
Ranked by Attention Score: stars gained over the last 30 complete days
14 repositories by Attention Score · Oct 4, 2026 – Nov 2, 2026 (UTC)
2.simdjson / simdjson
Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks
+177 stars
from 24,317 · score 5.18
3.google / flatbuffers
FlatBuffers: Memory Efficient Serialization Library
+76 stars
from 26,525 · score 4.34
4.tidwall / gjson
Get JSON values quickly - JSON parser for Go
+11 stars
from 15,546 · score 2.48
5.kgabis / parson
Lightweight JSON library written in C.
+8 stars
from 1,469 · score 2.20
6.SwiftyJSON / SwiftyJSON
The better way to deal with JSON data in Swift.
+6 stars
from 22,920 · score 1.95
7.halaxa / json-machine
Efficient, easy-to-use, and fast PHP JSON stream parser
+5 stars
from 1,329 · score 1.79
8.ohler55 / oj
Optimized JSON
+4 stars
from 3,224 · score 1.61
9.spyzhov / ajson
Abstract JSON for Golang with JSONPath support
+3 stars
from 292 · score 1.39
10.valyala / fastjson
Fast JSON parser and validator for Go. No custom structs, no code generation, no reflection
+2 stars
from 2,461 · score 1.10
11.devinus / poison
An incredibly fast, pure Elixir JSON library
+2 stars
from 2,028 · score 1.10
12.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
+2 stars
from 853 · score 1.10
13.json-iterator / goArchived
A high-performance 100% compatible drop-in replacement of "encoding/json"
+1 stars
from 13,853 · score 0.69
14.beached / daw_json_link
Fast, convenient JSON serialization and parsing in C++
+1 stars
from 512 · score 0.69