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

A Java serialization/deserialization library to convert Java Objects into JSON and back

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

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

Model framework for Cocoa and Cocoa Touch

• objective-c
• json
• boilerplate

Serialization framework for Rust

• rust
• serde
• derive
• no-std

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

• javascript
• typescript
• protobuf
• protocol-buffers

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

• json
• python
• rust
• serialization

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

• serialization
• deserialization
• validation
• python

Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]

• messagepack
• unity
• serialization
• xamarin

Magical Data Modeling Framework for JSON - allows rapid creation of smart data models. You can use it in your iOS, macOS, watchOS and tvOS apps.

Java binary serialization and cloning: fast, efficient, automatic

• java
• serialization
• cloning
• kryo

HCL is the HashiCorp configuration language.

• hcl
• configuration-language
• hashicorp
• json

TinyXML2 is a simple, small, efficient, C++ XML parser that can be easily integrated into other programs.

Python module that makes working with XML feel like you are working with JSON

ActiveModel::Serializer implementation and Rails hooks

• ruby
• json
• resource-serializer

Protocol Buffers library for idiomatic .NET