1.nlohmann / json
JSON for Modern C++
+738 stars
from 50,091 · score 6.61
Trending repositories
Ranked by Attention Score: stars gained over the last 90 complete days
19 repositories by Attention Score · Aug 5, 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
+430 stars
from 24,064 · score 6.07
3.google / flatbuffers
FlatBuffers: Memory Efficient Serialization Library
+375 stars
from 26,226 · score 5.93
4.tidwall / gjson
Get JSON values quickly - JSON parser for Go
+52 stars
from 15,505 · score 3.97
5.SwiftyJSON / SwiftyJSON
The better way to deal with JSON data in Swift.
+32 stars
from 22,894 · score 3.50
6.kgabis / parson
Lightweight JSON library written in C.
+16 stars
from 1,461 · score 2.83
7.halaxa / json-machine
Efficient, easy-to-use, and fast PHP JSON stream parser
+14 stars
from 1,320 · score 2.71
8.valyala / fastjson
Fast JSON parser and validator for Go. No custom structs, no code generation, no reflection
+10 stars
from 2,453 · score 2.40
9.alibaba / fastjsonArchived
FASTJSON 2.0.x has been released, faster and more secure, recommend you upgrade.
+9 stars
from 25,553 · score 2.30
10.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
+8 stars
from 847 · score 2.20
11.ohler55 / oj
Optimized JSON
+7 stars
from 3,221 · score 2.08
12.spyzhov / ajson
Abstract JSON for Golang with JSONPath support
+6 stars
from 289 · score 1.95
13.json-iterator / goArchived
A high-performance 100% compatible drop-in replacement of "encoding/json"
+5 stars
from 13,849 · score 1.79
14.gecko0307 / dlib
Allocators, I/O streams, math, geometry, image and audio processing for D
+5 stars
from 226 · score 1.79
15.devinus / poison
An incredibly fast, pure Elixir JSON library
+4 stars
from 2,026 · score 1.61
16.beached / daw_json_link
Fast, convenient JSON serialization and parsing in C++
+3 stars
from 510 · score 1.39
17.simplejson / simplejson
simplejson is a simple, fast, extensible JSON encoder/decoder for Python
+1 stars
from 1,709 · score 0.69
18.argonaut-io / argonaut
Purely functional JSON parser and library in scala.
+1 stars
from 543 · score 0.69
19.biot2 / Yaml.Json.Parser.pas
YAML and JSON parser, serializer and deserializer with YAML to JSON and vice versa conversion tools containing pure Object Pascal source code for both Delphi and Lazarus
+1 stars
from 8 · score 0.69