+717 stars
from 50,122 · score 6.58
Trending repositories
Ranked by Attention Score: stars gained over the last 90 complete days
1–100 of 135 by Attention Score · Aug 7, 2026 – Nov 4, 2026 (UTC)
2.toon-format / toon
🎒 Token-Oriented Object Notation (TOON) – compact, human-readable serialization of JSON data for LLM prompts. TypeScript SDK, CLI, benchmarks.
- data-format
- llm
- serialization
- tokenization
+656 stars
from 24,954 · score 6.49
+205 stars
from 12,860 · score 5.33
4.stephenberry / glaze
Extremely fast, in memory, serialization, reflection, and RPC library for C++. JSON, BEVE, BSON, CBOR, CSV, JSONB, MessagePack, TOML, YAML, EETF
- api
- binary
- cplusplus
- cpp
- interface
- json
- +14 more
+175 stars
from 2,923 · score 5.17
5.ibireme / yyjson
The fastest JSON library in C
- json
- c
- portable
- serialization
- deserialization
- cross-platform
- +3 more
+124 stars
from 3,815 · score 4.83
+76 stars
from 6,074 · score 4.34
7.marzer / tomlplusplus
Header-only TOML config file parser and serializer for C++17.
- toml
- cplusplus-17
- cplusplus-20
- header-only
- configuration-files
- cpp
- +14 more
+70 stars
from 2,110 · score 4.26
8.mholt / PapaParse
Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input
- csv
- javascript
- csv-parser
+68 stars
from 13,523 · score 4.23
9.munich-data-engineering / reflect-cpp
A C++20 library for fast serialization, deserialization and validation using reflection. Supports JSON, Avro, Boost Serialization, BSON, Cap'n Proto, CBOR, Cereal, Command line interfaces, CSV, Environment variables, flexbuffers, msgpack, parquet, TOML, UBJSON, XML, YAML, yas / msgpack.org[C++20]
+55 stars
from 1,914 · score 4.03
10.bblanchon / ArduinoJson
📟 JSON library for Arduino and embedded C++. Simple and efficient.
- arduino
- c-plus-plus
- iot
- embedded
- arduino-library
- json
- +2 more
+53 stars
from 7,189 · score 3.99
+51 stars
from 15,508 · score 3.95
+49 stars
from 4,979 · score 3.91
13.zserge / jsmn
Jsmn is a world fastest JSON parser/tokenizer. This is the official repo replacing the old one at Bitbucket
- json-data
- json-string
- parsing
+48 stars
from 4,162 · score 3.89
+48 stars
from 2,922 · score 3.89
15.JamesNK / Newtonsoft.Json
Json.NET is a popular high-performance JSON framework for .NET
- json
- c-sharp
+41 stars
from 11,277 · score 3.74
+34 stars
from 6,606 · score 3.56
+32 stars
from 2,842 · score 3.50
18.nschloe / meshio
:spider_web: input/output for many mesh formats
- vtk
- pypi
- python
- mesh
- mathematics
- engineering
- +1 more
+31 stars
from 2,310 · score 3.47
19.fxamacker / cbor
CBOR codec (RFC 8949, RFC 8742) with CBOR tags, Go struct tag options (toarray, keyasint, omitempty, omitzero), float64/32/16, big.Int, and fuzz tested.
- cbor
- rfc-8949
- cose
- cwt
- go
- golang
- +7 more
+30 stars
from 1,072 · score 3.43
20.inikulin / parse5
HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.
+27 stars
from 3,911 · score 3.33
21.felixguendling / cista
Cista is a simple, high-performance, zero-copy C++ serialization & reflection library.
- serialization
- cpp
- cpp17
- reflection
- deserialization
- efficient
- +3 more
+27 stars
from 2,229 · score 3.33
+27 stars
from 2,172 · score 3.33
23.SwiftyJSON / SwiftyJSON
The better way to deal with JSON data in Swift.
- swiftyjson
- json
- swift
- response
- request
- carthage
- +4 more
+25 stars
from 22,896 · score 3.26
24.vincentlaucsb / csv-parser
A modern C++ CSV parser and serializer that doesn't make you choose between ease of use or performance.
- csv
- parser
- json
- tab-separated
- csv-parser
- statistics
- +5 more
+25 stars
from 1,112 · score 3.26
25.NaturalIntelligence / fast-xml-parser
Validate XML, Parse XML and Build XML rapidly without C/C++ based libraries and no callback.
- fast-xml-parser
- xml2json
- xml2js
- fast
- xml
- parser
- +11 more
+24 stars
from 3,116 · score 3.22
26.okuramasafumi / alba
Alba is a JSON serializer for Ruby, JRuby and TruffleRuby.
- json-serializer
- json-serialization
- ruby
- performance
- json
- presenter
- +1 more
+24 stars
from 1,191 · score 3.22
27.brofield / simpleini
Cross-platform C++ library providing a simple API to read and write INI-style configuration files
+23 stars
from 1,304 · score 3.18
28.ToruNiina / toml11
TOML for Modern C++
- toml
- c-plus-plus-11
- c-plus-plus
- parser
- serializer
- c-plus-plus-14
- +4 more
+23 stars
from 1,287 · score 3.18
+22 stars
from 1,146 · score 3.14
30.eyalz800 / zpp_bits
A lightweight C++20 serialization and RPC library
- serialization
- cpp
- header-only
- rpc
- cpp20
+22 stars
from 993 · score 3.14
31.nietras / Sep
One of the World's Fastest .NET CSV Parsers. Modern, minimal, fast, zero allocation, reading and writing of separated values (`csv`, `tsv` etc.). Cross-platform, trimmable and AOT/NativeAOT compatible with blazing fast SIMD vectorized parsing.
- csharp
- csv
- csv-parser
- csv-reader
- csv-writer
- dotnet
- +2 more
+21 stars
from 1,461 · score 3.09
32.marshmallow-code / marshmallow
A lightweight library for converting complex objects to and from simple Python datatypes.
- serialization
- deserialization
- validation
- python
- marshalling
- serde
- +1 more
+20 stars
from 7,224 · score 3.04
33.sindresorhus / query-string
Parse and stringify URL query strings
- query-string
- urlsearchparams
- url
- stringify
- parse
- npm-package
+19 stars
from 6,895 · score 3.00
34.martinblech / xmltodict
Python module that makes working with XML feel like you are working with JSON
+18 stars
from 5,741 · score 2.94
+18 stars
from 180 · score 2.94
36.jstedfast / MimeKit
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
+17 stars
from 1,993 · score 2.89
37.nmdias / FeedKit
FeedKit is a Swift library for Reading and Generating RSS, Atom, and JSON feeds.
- rss
- atom
- swift
- rss-reader
- atom-feed-parser
- atom-reader
- +4 more
+16 stars
from 1,342 · score 2.83
38.jpsim / Yams
A Sweet and Swifty YAML parser.
+16 stars
from 1,257 · score 2.83
+15 stars
from 1,461 · score 2.77
40.biojppm / rapidyaml
Rapid YAML - a library to parse and emit YAML, and do it fast.
- yaml
- json
- parser
- emitter
- serialization
- rapid
- +6 more
+15 stars
from 747 · score 2.77
41.CuyZ / Valinor
Dependency free PHP library that helps to map any input into a strongly-typed structure.
+14 stars
from 1,519 · score 2.71
+14 stars
from 1,067 · score 2.71
43.callum-oakley / json5-rs
A Rust JSON5 serializer and deserializer which speaks Serde.
+14 stars
from 237 · score 2.71
44.jazzband / tablib
Python Module for Tabular Datasets in XLS, CSV, JSON, YAML, &c.
+13 stars
from 4,745 · score 2.64
45.ugorji / go
idiomatic codec and rpc lib for msgpack, cbor, json, etc. msgpack.org[Go]
+13 stars
from 1,953 · score 2.64
+13 stars
from 1,256 · score 2.64
47.go-playground / form
:steam_locomotive: Decodes url.Values into Go value(s) and Encodes Go value(s) into url.Values. Dual Array and Full map support.
- decoding
- encoder
- form
- parser
- form-data
+13 stars
from 919 · score 2.64
48.valyala / fastjson
Fast JSON parser and validator for Go. No custom structs, no code generation, no reflection
- json-parser
- fast
- golang
- go
- json
- json-validation
+11 stars
from 2,454 · score 2.48
49.pantoniou / libfyaml
Fully feature complete YAML parser and emitter, supporting the latest YAML spec and passing the full YAML testsuite.
+11 stars
from 336 · score 2.48
50.ffrostfall / ByteNet
An advanced, modern networking library for Luau/Roblox
- buffer
- luau
- netcode
- networking
- roblox
+11 stars
from 173 · score 2.48
51.nmwsharp / happly
A C++ header-only parser for the PLY file format. Parse .ply happily!
+10 stars
from 401 · score 2.40
52.lofcz / FastCloner
The fastest deep cloning library for .NET – zero-config, works out of the box.
- deep-clone
- deep-copy
- deepclone
- deepcopy
- duplication
- cloner
- +11 more
+10 stars
from 365 · score 2.40
53.metayeti / mINI
INI file reader and writer
- ini-file
- ini-reader
- ini-writer
- ini-parser
- ini-config
- ini
- +1 more
+9 stars
from 652 · score 2.30
54.Zulu-Inuoe / jzon
A correct and safe(er) JSON RFC 8259 reader/writer with sane defaults.
+9 stars
from 194 · score 2.30
+8 stars
from 992 · score 2.20
56.thephpleague / csv
CSV data manipulation made easy in PHP
- php
- csv-document
- csv-converter
- csv-filter
- csv-query
- csv
+7 stars
from 3,473 · score 2.08
57.chronoxor / FastBinaryEncoding
Fast Binary Encoding is ultra fast and universal serialization solution for C++, C#, Go, Java, JavaScript, Kotlin, Python, Ruby, Swift
- performance
- serialization
- binary
- protocol
- low-latency
- cpp
- +9 more
+7 stars
from 956 · score 2.08
+7 stars
from 949 · score 2.08
+7 stars
from 676 · score 2.08
60.Rookfighter / inifile-cpp
A header-only and easy to use Ini file parser for C++.
- ini-parser
- inifile
- cpp
- cpp-library
+7 stars
from 417 · score 2.08
+7 stars
from 357 · score 2.08
+6 stars
from 3,222 · score 1.95
63.dakrone / cheshire
Clojure JSON and JSON SMILE (binary json format) encoding/decoding
+6 stars
from 1,555 · score 1.95
64.mafintosh / csv-parser
Streaming csv parser inspired by binary-csv that aims to be faster than everyone else
+6 stars
from 1,498 · score 1.95
65.procore-oss / blueprinter
Simple, Fast, and Declarative Serialization Library for Ruby
- ruby
- rails
- json
- serializer
- resource-serializer
- presenter
+6 stars
from 1,307 · score 1.95
66.jszwec / csvutil
csvutil provides fast and idiomatic mapping between CSV and Go (golang) values.
- golang
- csv
- fast
- csv-parser
- go
- csvutil
- +6 more
+6 stars
from 1,031 · score 1.95
67.tplgy / cppcodec
Header-only C++11 library to encode/decode base64, base64url, base32, base32hex and hex (a.k.a. base16) as specified in RFC 4648, plus Crockford's base32. MIT licensed with consistent, flexible API.
+6 stars
from 694 · score 1.95
68.emersion / go-message
✉️ A streaming Go library for the Internet Message Format and mail messages
- mime
+6 stars
from 454 · score 1.95
69.spyzhov / ajson
Abstract JSON for Golang with JSONPath support
- golang
- golang-package
- json
- json-parser
- jsonpath
+6 stars
from 289 · score 1.95
70.CoderMJLee / MJExtension
A fast, convenient and nonintrusive conversion framework between JSON and model. Your model class doesn't need to extend any base class. You don't need to modify any model file.
- objective-c
- model
- json
- dictionary
- array
+5 stars
from 8,477 · score 1.79
71.rails-api / active_model_serializers
ActiveModel::Serializer implementation and Rails hooks
- ruby
- json
- resource-serializer
+5 stars
from 5,336 · score 1.79
72.JohnSundell / Codextended
Extensions giving Swift's Codable API type inference super powers 🦸♂️🦹♀️
- swift
- codable
- json-parsing
- type-inference
+5 stars
from 1,508 · score 1.79
+5 stars
from 1,463 · score 1.79
74.osiegmar / FastCSV
Fast, lightweight, and RFC 4180 compliant CSV library for Java. Zero dependencies, ~90 KiB. Trusted by Apache NiFi, JUnit, and Neo4j.
- csv
- java
- csv-parser
- csv-reader
- zero-dependency
+5 stars
from 689 · score 1.79
75.RehanSaeed / Schema.NET
Schema.org objects turned into strongly typed C# POCO classes for use in .NET. All classes can be serialized into JSON/JSON-LD and XML, typically used to represent structured data in the head section of html page.
- schema
- schema-org
- dotnet
- c-sharp
- dotnet-core
- poco
- +4 more
+5 stars
from 685 · score 1.79
76.TinyCsvParser / TinyCsvParser
Easy to use, easy to extend and high-performance library for CSV parsing with .NET
- csv-parser
+5 stars
from 404 · score 1.79
77.marksands / BetterCodable
Better Codable through Property Wrappers
- property-wrappers
- codable
- swift5-1
- swift-package-manager
+4 stars
from 1,799 · score 1.61
78.CoreOffice / XMLCoder
Easy XML parsing using Codable protocols in Swift
- xml
- xml-parser
- swift
- swift4
- codable
- carthage
- +4 more
+4 stars
from 874 · score 1.61
79.laravel / serializable-closure
Laravel Serializable Closure provides an easy and secure way to serialize closures in PHP.
- php
- serialize
- closure
+4 stars
from 603 · score 1.61
80.mafintosh / tar-stream
tar-stream is a streaming tar parser and generator.
+4 stars
from 433 · score 1.61
81.reers / ReerCodable
Codable extensions using Swift Macro
- ananda
- codable
- mjextension
- yymodel
- bettercodable
- codablewrapper
- +12 more
+4 stars
from 417 · score 1.61
+4 stars
from 355 · score 1.61
83.ValvePython / vdf
📜 Package for working with Valve's text and binary KeyValue format
+4 stars
from 210 · score 1.61
+4 stars
from 150 · score 1.61
85.json-iterator / goArchived
A high-performance 100% compatible drop-in replacement of "encoding/json"
- go
- golang
- parser
- json-parser
- json
- serialization
- +2 more
+3 stars
from 13,849 · score 1.39
86.rails / jbuilder
Jbuilder: generate JSON objects with a Builder-style DSL
+3 stars
from 4,416 · score 1.39
87.neuecc / Utf8JsonArchived
Definitely Fastest and Zero Allocation JSON Serializer for C#(NET, .NET Core, Unity, Xamarin).
+3 stars
from 2,377 · score 1.39
88.tilo / smarter_csv
Fastest end-to-end CSV ingestion for Ruby (with C acceleration). SmarterCSV auto-detects formats, applies smart defaults, and returns Rails-ready hashes for seamless use with ActiveRecord, Sidekiq, parallel jobs, and S3 pipelines — even for messy user-uploaded real-world data.
- csv
- csv-converter
- csv-export
- csv-file
- csv-files
- csv-format
- +11 more
+3 stars
from 1,548 · score 1.39
89.cezheng / Fuzi
A fast & lightweight XML & HTML parser in Swift with XPath & CSS support
- xml
- xml-parsing
- xml-parser
- xpath
- html
- html-parsing
- +6 more
+3 stars
from 1,101 · score 1.39
90.viniciussanchez / dataset-serialize
JSON to DataSet and DataSet to JSON converter for Delphi and Lazarus (FPC)
- delphi
- dataset
- json
- converter
- serialize
- dataset-serialize
- +10 more
+3 stars
from 743 · score 1.39
+3 stars
from 457 · score 1.39
92.ggicci / httpin
🍡 HTTP Input for Go - HTTP Request from/to Go Struct (Bi-directional Data Binding between Go Struct and http.Request)
- go-http
- go-http-middleware
- go-api
- go-rest-api
- http-request-params-reader
- go
- +2 more
+3 stars
from 387 · score 1.39
93.6bee / Remote.Linq
Simply LINQ your remote resources...
- linq-expressions
- arbitrary-linq-queries
- expression-trees
- entity
- entity-framework
- remote
- +3 more
+3 stars
from 356 · score 1.39
94.leandromoh / RecordParser
Zero Allocation Writer/Reader Parser for .NET Core
- flatfile
- csv
- tsv
- delimited
- file
- dotnet-core
- +8 more
+3 stars
from 322 · score 1.39
95.MistEO / meojson
✨ Next-gen C++ JSON Serialization Engine | Zero Dependency | Header-Only | Unleash JSON Potential
- json
- cpp
- parser
- json5
- serialization
+3 stars
from 158 · score 1.39
96.mus-format / mus-go
MUS format serializer for Go
- golang
- serialization
- codegen
- data-validation
- high-performance
- zero-allocation
- +1 more
+3 stars
from 142 · score 1.39
97.JensBorrisholt / Delphi-JsonToDelphiClass
Generates Delphi Classes based on JSON string (Json To Delphi Class Generator / JSON Data Binding Tool)
- json
- delphi
- delphi10
- dto-generator
- dto
- dtoclass
- +1 more
+3 stars
from 80 · score 1.39
98.neuecc / ZeroFormatterArchived
Infinitely Fast Deserializer for .NET, .NET Core and Unity.
- c-sharp
- unity
- serializer
- binaryformat
+2 stars
from 2,422 · score 1.10
99.schmittjoh / serializer
Library for (de-)serializing data of any complexity (supports JSON, and XML)
+2 stars
from 2,339 · score 1.10
+2 stars
from 1,321 · score 1.10