1.protocolbuffers / protobuf
Protocol Buffers - Google's data interchange format
- protobuf
- protocol-buffers
- protocol-compiler
- protobuf-runtime
- protoc
- serialization
- +2 more
+1,306 stars
from 70,844 · score 7.18
Trending repositories
Ranked by Attention Score: stars gained over the last 180 complete days
51 repositories by Attention Score · May 9, 2026 – Nov 4, 2026 (UTC)
2.capnproto / capnproto
Cap'n Proto serialization/RPC system - core tools and C++ library
+268 stars
from 12,974 · score 5.59
3.MessagePack-CSharp / MessagePack-CSharp
Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]
+180 stars
from 6,629 · score 5.20
4.Tencent / rapidjson
A fast JSON parser/generator for C++ with both SAX/DOM style API
+179 stars
from 14,974 · score 5.19
5.open-source-parsers / jsoncpp
A C++ library for interacting with JSON.
+125 stars
from 8,784 · score 4.84
6.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
+112 stars
from 10,492 · score 4.73
7.benhoyt / inih
Simple .INI file parser in C, good for embedded systems
- ini
- parser
- configparser
- embedded-systems
- c
+111 stars
from 2,954 · score 4.72
+80 stars
from 1,922 · score 4.39
+73 stars
from 923 · score 4.30
+57 stars
from 3,317 · score 4.06
+56 stars
from 2,950 · score 4.04
+54 stars
from 5,162 · score 4.01
13.protobuf-net / protobuf-net
Protocol Buffers library for idiomatic .NET
+52 stars
from 4,924 · score 3.97
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
+50 stars
from 3,254 · score 3.93
15.msgpack / msgpack-c
MessagePack implementation for C and C++ / msgpack.org[C/C++]
+49 stars
from 3,306 · score 3.91
16.ultrajson / ultrajson
Ultra fast JSON decoder and encoder written in C with Python bindings
- python
- c
- ultrajson
- json
- decoder
- encoder
- +1 more
+32 stars
from 4,468 · score 3.50
17.stleary / JSON-java
A reference implementation of a JSON package in Java.
- hacktoberfest
- java
- json
- public-domain
+31 stars
from 4,694 · score 3.47
18.msgpack / msgpack-python
MessagePack serializer implementation for Python msgpack.org[Python]
- python
- msgpack
+30 stars
from 2,075 · score 3.43
+26 stars
from 771 · score 3.30
20.Masterminds / html5-php
An HTML5 parser and serializer for PHP.
- xml-namespaces
- php
- html5-parser
- dom
- domdocument
- html5-php
- +2 more
+25 stars
from 1,763 · score 3.26
21.FirelyTeam / firely-net-sdk
The official Firely .NET SDK for HL7 FHIR
- fhir
- dotnet-core
- dotnet
- parsing
- serialization
- validation
- +8 more
+23 stars
from 918 · score 3.18
22.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
+23 stars
from 833 · score 3.18
23.tidyverse / readr
Read flat files (csv, tsv, fwf) into R
+13 stars
from 1,028 · score 2.64
24.fsprojects / FSharp.Data
F# Data: Library for Data Access
+13 stars
from 862 · score 2.64
+12 stars
from 11,224 · score 2.56
+11 stars
from 1,669 · score 2.48
27.cesanta / frozen
JSON parser and generator for C/C++ with scanf/printf like interface. Targeting embedded systems.
+11 stars
from 765 · score 2.48
28.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
+11 stars
from 463 · score 2.48
+9 stars
from 449 · score 2.30
+9 stars
from 345 · score 2.30
+8 stars
from 612 · score 2.20
32.dlang-community / SDLang-D
An SDLang (Simple Declarative Language) library for D
+6 stars
from 121 · score 1.95
33.jimhigson / oboe.js
A streaming approach to JSON. Oboe.js speeds up web applications by providing parsed objects before the response completes.
+5 stars
from 4,811 · score 1.79
34.simplejson / simplejson
simplejson is a simple, fast, extensible JSON encoder/decoder for Python
- json
- python
- python3
- python2
- json-parser
- json-serializer
+5 stars
from 1,705 · score 1.79
+5 stars
from 875 · score 1.79
36.SSARCandy / ini-cpp
📑 Yet another ini config parser for modern C++
- cpp17
- cmake
- gtest
- header-only
- configparser
- ini
- +1 more
+5 stars
from 49 · score 1.79
37.alibaba / HandyJSON
A handy swift json-object serialization/deserialization library
- swift
- json
- serialization
- json-fields
- deserialization
- mapping
+4 stars
from 4,252 · score 1.61
38.jeroen / jsonlite
Simple JSON Parser and Generator for R
+4 stars
from 400 · score 1.61
39.harningt / luajson
JSON parser/encoder for Lua Parses JSON using LPEG for speed and flexibility. Depending on parser/encoder options, various values are preserved as best as possible.
+3 stars
from 253 · score 1.39
+3 stars
from 213 · score 1.39
41.PavelKisliak / BitSerializer
Multi-format serialization library for C++17: JSON/JSONC, CSV and MsgPack (dependency-free), plus XML and YAML
- csv
- json
- serialization
- xml
- yaml
- msgpack
- +5 more
+3 stars
from 31 · score 1.39
42.tidyverse / vroom
Fast reading of delimited files
+2 stars
from 641 · score 1.10
43.netcan / config-loader
Simple C++ Config Loader Framework(Serialization & Reflection)
- cpp
- json
- yaml
- xml
- deserializer
- serializer
+2 stars
from 246 · score 1.10
44.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
45.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
46.mongojack / mongojack
Mongojack maps Java objects to MongoDB documents. Based on the Jackson JSON mapper, Mongojack allows you to easily handle your mongo objects as POJOs (insert, search by id or by any other field, update).
+1 stars
from 276 · score 0.69
+1 stars
from 241 · score 0.69
48.AccelerationNet / cl-csv
A common lisp library providing easy csv reading and writing
+1 stars
from 130 · score 0.69
49.compactr / compactr.js
OpenAPI based binary serialization
+1 stars
from 107 · score 0.69
+1 stars
from 37 · score 0.69
+1 stars
from 29 · score 0.69