Repository Index

Protocol Buffers - Google's data interchange format

• protobuf
• protocol-buffers
• protocol-compiler
• protobuf-runtime

JSON for Modern C++

• json
• json-pointer
• json-patch
• cbor

FlatBuffers: Memory Efficient Serialization Library

• flatbuffers
• serialization
• serialization-library
• json-parser

🎒 Token-Oriented Object Notation (TOON) – compact, human-readable serialization of JSON data for LLM prompts. TypeScript SDK, CLI, benchmarks.

• data-format
• llm
• serialization
• tokenization

Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks

• json
• json-parser
• simd
• avx2

The better way to deal with JSON data in Swift.

• swiftyjson
• json
• swift
• response

Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics

• arrow
• parquet

Get JSON values quickly - JSON parser for Go

• json
• golang
• json-parser

A fast JSON parser/generator for C++ with both SAX/DOM style API

Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input

• csv
• javascript
• csv-parser

Cap'n Proto serialization/RPC system - core tools and C++ library

Ultralightweight JSON parser in ANSI C

Json.NET is a popular high-performance JSON framework for .NET

• json
• c-sharp

Model framework for Cocoa and Cocoa Touch

• objective-c
• json
• boilerplate

Apache Thrift

• d
• thrift
• cplusplus
• dart

High-performance Protocol Buffers for JavaScript and TypeScript. Conformant through Edition 2026, and unusually versatile. No protoc required.

• javascript
• typescript
• protobuf
• protocol-buffers

Go support for Google's protocol buffers

• go
• golang
• protobuf
• protocol-buffers

A blazingly fast JSON serializing & deserializing library

• high-performance
• json
• jit
• simd

Simple JSON Object mapping written in Swift

A C++ library for interacting with JSON.

JSON in JavaScript

Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy

• json
• python
• rust
• serialization

📟 JSON library for Arduino and embedded C++. Simple and efficient.

• arduino
• c-plus-plus
• iot
• embedded

A lightweight library for converting complex objects to and from simple Python datatypes.

• serialization
• deserialization
• validation
• python