1.protocolbuffers / protobuf
Protocol Buffers - Google's data interchange format
- protobuf
- protocol-buffers
- protocol-compiler
- protobuf-runtime
- protoc
- serialization
- +2 more
+626 stars
from 71,524 · score 6.44
Trending repositories
Ranked by Attention Score: stars gained over the last 90 complete days
45 repositories by Attention Score · Aug 7, 2026 – Nov 4, 2026 (UTC)
2.capnproto / capnproto
Cap'n Proto serialization/RPC system - core tools and C++ library
+118 stars
from 13,124 · score 4.78
3.Tencent / rapidjson
A fast JSON parser/generator for C++ with both SAX/DOM style API
+85 stars
from 15,068 · score 4.45
4.MessagePack-CSharp / MessagePack-CSharp
Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]
+63 stars
from 6,746 · score 4.16
5.open-source-parsers / jsoncpp
A C++ library for interacting with JSON.
+56 stars
from 8,853 · score 4.04
6.benhoyt / inih
Simple .INI file parser in C, good for embedded systems
- ini
- parser
- configparser
- embedded-systems
- c
+45 stars
from 3,020 · score 3.83
+41 stars
from 1,961 · score 3.74
8.protobufjs / protobuf.js
High-performance Protocol Buffers for JavaScript and TypeScript. Conformant through Edition 2026, and unusually versatile. No protoc required.
- javascript
- typescript
- protobuf
- protocol-buffers
+40 stars
from 10,564 · score 3.71
+37 stars
from 959 · score 3.64
+31 stars
from 2,975 · score 3.47
+28 stars
from 3,346 · score 3.37
12.protobuf-net / protobuf-net
Protocol Buffers library for idiomatic .NET
+25 stars
from 4,951 · score 3.26
+24 stars
from 5,192 · score 3.22
14.json-c / json-c
https://github.com/json-c/json-c is the official code repository for json-c. See the wiki for release tarballs for download. API docs at http://json-c.github.io/json-c/
- json
- c
- hacktoberfest
+24 stars
from 3,280 · score 3.22
15.msgpack / msgpack-c
MessagePack implementation for C and C++ / msgpack.org[C/C++]
+22 stars
from 3,333 · score 3.14
16.stleary / JSON-java
A reference implementation of a JSON package in Java.
- hacktoberfest
- java
- json
- public-domain
+16 stars
from 4,709 · score 2.83
17.Masterminds / html5-php
An HTML5 parser and serializer for PHP.
- xml-namespaces
- php
- html5-parser
- dom
- domdocument
- html5-php
- +2 more
+12 stars
from 1,776 · score 2.56
18.FirelyTeam / firely-net-sdk
The official Firely .NET SDK for HL7 FHIR
- fhir
- dotnet-core
- dotnet
- parsing
- serialization
- validation
- +8 more
+12 stars
from 929 · score 2.56
19.ultrajson / ultrajson
Ultra fast JSON decoder and encoder written in C with Python bindings
- python
- c
- ultrajson
- json
- decoder
- encoder
- +1 more
+10 stars
from 4,490 · score 2.40
20.msgpack / msgpack-python
MessagePack serializer implementation for Python msgpack.org[Python]
- python
- msgpack
+9 stars
from 2,096 · score 2.30
21.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
- json
- cbor
- jsonpath
- csv
- json-pointer
- json-patch
- +14 more
+9 stars
from 847 · score 2.30
22.tidyverse / readr
Read flat files (csv, tsv, fwf) into R
+7 stars
from 1,034 · score 2.08
23.jorgen / json_struct
json_struct is a single header only C++ library for parsing JSON directly to C++ structs and vice versa
- c-plus-plus
- json
- template-specialisations
- parse
- template-metaprogramming
- deserialization
- +1 more
+6 stars
from 468 · score 1.95
+6 stars
from 452 · score 1.95
+5 stars
from 11,231 · score 1.79
+5 stars
from 1,675 · score 1.79
27.fsprojects / FSharp.Data
F# Data: Library for Data Access
+5 stars
from 870 · score 1.79
+5 stars
from 792 · score 1.79
29.cesanta / frozen
JSON parser and generator for C/C++ with scanf/printf like interface. Targeting embedded systems.
+4 stars
from 772 · score 1.61
+4 stars
from 380 · score 1.61
31.dlang-community / SDLang-D
An SDLang (Simple Declarative Language) library for D
+3 stars
from 124 · score 1.39
32.jimhigson / oboe.js
A streaming approach to JSON. Oboe.js speeds up web applications by providing parsed objects before the response completes.
+2 stars
from 4,814 · score 1.10
33.alibaba / HandyJSON
A handy swift json-object serialization/deserialization library
- swift
- json
- serialization
- json-fields
- deserialization
- mapping
+2 stars
from 4,254 · score 1.10
+2 stars
from 878 · score 1.10
+2 stars
from 618 · score 1.10
+2 stars
from 352 · score 1.10
37.grijjy / GrijjyFoundation
Foundation classes used by other Grijjy repositories
+2 stars
from 260 · score 1.10
38.simplejson / simplejson
simplejson is a simple, fast, extensible JSON encoder/decoder for Python
- json
- python
- python3
- python2
- json-parser
- json-serializer
+1 stars
from 1,709 · score 0.69
39.billyquith / ponderArchived
C++ reflection library with Lua binding, and JSON and XML serialisation.
- c-plus-plus
- reflection
- library
- introspection
- cpp
- cpp-library
- +5 more
+1 stars
from 662 · score 0.69
40.tidyverse / vroom
Fast reading of delimited files
+1 stars
from 642 · score 0.69
41.argonaut-io / argonaut
Purely functional JSON parser and library in scala.
- argonaut
- scala
- json
- json-parser
- scalaz
- functional-programming
+1 stars
from 543 · score 0.69
42.jeroen / jsonlite
Simple JSON Parser and Generator for R
+1 stars
from 403 · score 0.69
+1 stars
from 241 · score 0.69
+1 stars
from 215 · score 0.69
+1 stars
from 37 · score 0.69