1.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
+1,757 stars
from 23,853 · score 7.47
Trending repositories
Ranked by Attention Score: stars gained over the last 180 complete days
1–100 of 142 by Attention Score · May 9, 2026 – Nov 4, 2026 (UTC)
+1,608 stars
from 49,231 · score 7.38
+467 stars
from 12,598 · score 6.15
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
+382 stars
from 2,716 · score 5.95
+269 stars
from 5,881 · score 5.60
6.ibireme / yyjson
The fastest JSON library in C
- json
- c
- portable
- serialization
- deserialization
- cross-platform
- +3 more
+229 stars
from 3,710 · score 5.44
7.mholt / PapaParse
Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input
- csv
- javascript
- csv-parser
+178 stars
from 13,413 · score 5.19
+160 stars
from 15,399 · score 5.08
9.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
+146 stars
from 2,034 · score 4.99
10.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]
+136 stars
from 1,833 · score 4.92
11.bblanchon / ArduinoJson
📟 JSON library for Arduino and embedded C++. Simple and efficient.
- arduino
- c-plus-plus
- iot
- embedded
- arduino-library
- json
- +2 more
+120 stars
from 7,122 · score 4.80
+110 stars
from 4,918 · score 4.71
+106 stars
from 2,864 · score 4.67
14.JamesNK / Newtonsoft.Json
Json.NET is a popular high-performance JSON framework for .NET
- json
- c-sharp
+103 stars
from 11,215 · score 4.64
15.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
+103 stars
from 4,107 · score 4.64
+91 stars
from 6,549 · score 4.52
17.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
+81 stars
from 3,059 · score 4.41
+72 stars
from 2,127 · score 4.29
+70 stars
from 2,804 · score 4.26
20.SwiftyJSON / SwiftyJSON
The better way to deal with JSON data in Swift.
- swiftyjson
- json
- swift
- response
- request
- carthage
- +4 more
+69 stars
from 22,852 · score 4.25
21.nschloe / meshio
:spider_web: input/output for many mesh formats
- vtk
- pypi
- python
- mesh
- mathematics
- engineering
- +1 more
+67 stars
from 2,274 · score 4.22
22.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
+64 stars
from 1,038 · score 4.17
23.inikulin / parse5
HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.
+61 stars
from 3,877 · score 4.13
24.eyalz800 / zpp_bits
A lightweight C++20 serialization and RPC library
- serialization
- cpp
- header-only
- rpc
- cpp20
+57 stars
from 958 · score 4.06
25.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
+56 stars
from 1,081 · score 4.04
26.felixguendling / cista
Cista is a simple, high-performance, zero-copy C++ serialization & reflection library.
- serialization
- cpp
- cpp17
- reflection
- deserialization
- efficient
- +3 more
+54 stars
from 2,202 · score 4.01
27.okuramasafumi / alba
Alba is a JSON serializer for Ruby, JRuby and TruffleRuby.
- json-serializer
- json-serialization
- ruby
- performance
- json
- presenter
- +1 more
+52 stars
from 1,163 · score 3.97
28.ToruNiina / toml11
TOML for Modern C++
- toml
- c-plus-plus-11
- c-plus-plus
- parser
- serializer
- c-plus-plus-14
- +4 more
+50 stars
from 1,260 · score 3.93
+50 stars
from 1,118 · score 3.93
30.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
+47 stars
from 1,435 · score 3.87
31.marshmallow-code / marshmallow
A lightweight library for converting complex objects to and from simple Python datatypes.
- serialization
- deserialization
- validation
- python
- marshalling
- serde
- +1 more
+43 stars
from 7,201 · score 3.78
32.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
+43 stars
from 1,315 · score 3.78
33.brofield / simpleini
Cross-platform C++ library providing a simple API to read and write INI-style configuration files
+40 stars
from 1,287 · score 3.71
34.biojppm / rapidyaml
Rapid YAML - a library to parse and emit YAML, and do it fast.
- yaml
- json
- parser
- emitter
- serialization
- rapid
- +6 more
+40 stars
from 722 · score 3.71
35.sindresorhus / query-string
Parse and stringify URL query strings
- query-string
- urlsearchparams
- url
- stringify
- parse
- npm-package
+36 stars
from 6,878 · score 3.61
36.martinblech / xmltodict
Python module that makes working with XML feel like you are working with JSON
+36 stars
from 5,723 · score 3.61
37.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
+36 stars
from 1,515 · score 3.61
38.CuyZ / Valinor
Dependency free PHP library that helps to map any input into a strongly-typed structure.
+36 stars
from 1,497 · score 3.61
+36 stars
from 1,233 · score 3.61
+32 stars
from 3,196 · score 3.50
+32 stars
from 1,444 · score 3.50
42.jpsim / Yams
A Sweet and Swifty YAML parser.
+32 stars
from 1,241 · score 3.50
43.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
+30 stars
from 2,435 · score 3.43
44.jstedfast / MimeKit
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
+30 stars
from 1,980 · score 3.43
45.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
+27 stars
from 905 · score 3.33
46.ffrostfall / ByteNet
An advanced, modern networking library for Luau/Roblox
- buffer
- luau
- netcode
- networking
- roblox
+27 stars
from 157 · score 3.33
47.json-iterator / goArchived
A high-performance 100% compatible drop-in replacement of "encoding/json"
- go
- golang
- parser
- json-parser
- json
- serialization
- +2 more
+26 stars
from 13,826 · score 3.30
48.ugorji / go
idiomatic codec and rpc lib for msgpack, cbor, json, etc. msgpack.org[Go]
+26 stars
from 1,940 · score 3.30
49.metayeti / mINI
INI file reader and writer
- ini-file
- ini-reader
- ini-writer
- ini-parser
- ini-config
- ini
- +1 more
+26 stars
from 635 · score 3.30
+25 stars
from 173 · score 3.26
51.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
+24 stars
from 351 · score 3.22
52.jazzband / tablib
Python Module for Tabular Datasets in XLS, CSV, JSON, YAML, &c.
+23 stars
from 4,735 · score 3.18
53.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
+22 stars
from 672 · score 3.14
54.rails-api / active_model_serializers
ActiveModel::Serializer implementation and Rails hooks
- ruby
- json
- resource-serializer
+20 stars
from 5,321 · score 3.04
55.procore-oss / blueprinter
Simple, Fast, and Declarative Serialization Library for Ruby
- ruby
- rails
- json
- serializer
- resource-serializer
- presenter
+20 stars
from 1,293 · score 3.04
56.pantoniou / libfyaml
Fully feature complete YAML parser and emitter, supporting the latest YAML spec and passing the full YAML testsuite.
+19 stars
from 328 · score 3.00
57.callum-oakley / json5-rs
A Rust JSON5 serializer and deserializer which speaks Serde.
+19 stars
from 232 · score 3.00
+18 stars
from 1,063 · score 2.94
+18 stars
from 938 · score 2.94
60.emersion / go-message
✉️ A streaming Go library for the Internet Message Format and mail messages
- mime
+18 stars
from 442 · score 2.94
61.thephpleague / csv
CSV data manipulation made easy in PHP
- php
- csv-document
- csv-converter
- csv-filter
- csv-query
- csv
+17 stars
from 3,463 · score 2.89
62.mafintosh / csv-parser
Streaming csv parser inspired by binary-csv that aims to be faster than everyone else
+17 stars
from 1,487 · score 2.89
63.nmwsharp / happly
A C++ header-only parser for the PLY file format. Parse .ply happily!
+17 stars
from 394 · score 2.89
64.rails / jbuilder
Jbuilder: generate JSON objects with a Builder-style DSL
+16 stars
from 4,403 · score 2.83
+16 stars
from 138 · score 2.83
+15 stars
from 985 · score 2.77
67.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
+15 stars
from 948 · score 2.77
68.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.
+15 stars
from 685 · score 2.77
69.dakrone / cheshire
Clojure JSON and JSON SMILE (binary json format) encoding/decoding
+14 stars
from 1,547 · score 2.71
70.jszwec / csvutil
csvutil provides fast and idiomatic mapping between CSV and Go (golang) values.
- golang
- csv
- fast
- csv-parser
- go
- csvutil
- +6 more
+14 stars
from 1,023 · score 2.71
71.Rookfighter / inifile-cpp
A header-only and easy to use Ini file parser for C++.
- ini-parser
- inifile
- cpp
- cpp-library
+14 stars
from 410 · score 2.71
72.reers / ReerCodable
Codable extensions using Swift Macro
- ananda
- codable
- mjextension
- yymodel
- bettercodable
- codablewrapper
- +12 more
+13 stars
from 408 · score 2.64
+13 stars
from 351 · score 2.64
74.Zulu-Inuoe / jzon
A correct and safe(er) JSON RFC 8259 reader/writer with sane defaults.
+13 stars
from 190 · score 2.64
75.marksands / BetterCodable
Better Codable through Property Wrappers
- property-wrappers
- codable
- swift5-1
- swift-package-manager
+12 stars
from 1,791 · score 2.56
+12 stars
from 1,456 · score 2.56
77.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
+12 stars
from 734 · score 2.56
+12 stars
from 671 · score 2.56
79.CoreOffice / XMLCoder
Easy XML parsing using Codable protocols in Swift
- xml
- xml-parser
- swift
- swift4
- codable
- carthage
- +4 more
+11 stars
from 867 · score 2.48
+11 stars
from 348 · score 2.48
81.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
+10 stars
from 8,472 · score 2.40
+10 stars
from 311 · score 2.40
+9 stars
from 2,574 · score 2.30
84.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
+9 stars
from 681 · score 2.30
85.laravel / serializable-closure
Laravel Serializable Closure provides an easy and secure way to serialize closures in PHP.
- php
- serialize
- closure
+9 stars
from 598 · score 2.30
+9 stars
from 451 · score 2.30
87.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
+9 stars
from 381 · score 2.30
88.nihilai-collective / Jsonifier
A few classes for extremely fast json parsing/serializing in modern C++. Possibly the fastest json parser in C++. Possibly the fastest json serializer in C++.
- cpp
- json
- json-parsing
- json-parsing-library
- serialization
- simd-instructions
- +8 more
+9 stars
from 94 · score 2.30
89.Leonidas-from-XIV / node-xml2js
XML to JavaScript object converter.
- coffeescript
- parsing
- xml-parser
- xml
- xml2json
- xml2js
- +4 more
+8 stars
from 4,951 · score 2.20
90.ValvePython / vdf
📜 Package for working with Valve's text and binary KeyValue format
+8 stars
from 206 · score 2.20
91.MistEO / meojson
✨ Next-gen C++ JSON Serialization Engine | Zero Dependency | Header-Only | Unleash JSON Potential
- json
- cpp
- parser
- json5
- serialization
+8 stars
from 153 · score 2.20
92.mus-format / mus-go
MUS format serializer for Go
- golang
- serialization
- codegen
- data-validation
- high-performance
- zero-allocation
- +1 more
+8 stars
from 137 · score 2.20
+8 stars
from 56 · score 2.20
94.neuecc / Utf8JsonArchived
Definitely Fastest and Zero Allocation JSON Serializer for C#(NET, .NET Core, Unity, Xamarin).
+7 stars
from 2,373 · score 2.08
95.schmittjoh / serializer
Library for (de-)serializing data of any complexity (supports JSON, and XML)
+7 stars
from 2,334 · score 2.08
96.JohnSundell / Codextended
Extensions giving Swift's Codable API type inference super powers 🦸♂️🦹♀️
- swift
- codable
- json-parsing
- type-inference
+7 stars
from 1,506 · score 2.08
+7 stars
from 106 · score 2.08
98.neuecc / ZeroFormatterArchived
Infinitely Fast Deserializer for .NET, .NET Core and Unity.
- c-sharp
- unity
- serializer
- binaryformat
+6 stars
from 2,418 · score 1.95
99.indice-co / EDI.Net
EDI Serializer/Deserializer. Supports EDIFact, X12 and TRADACOMS formats
- edi
- edifact
- x12
- serializer
- tradacoms
+6 stars
from 486 · score 1.95
+6 stars
from 103 · score 1.95