Protocol Buffers - Google's data interchange format

A fast JSON parser/generator for Java.

FlatBuffers: Memory Efficient Serialization Library

Cross-browser storage for all use cases, used across the web.

A high-performance 100% compatible drop-in replacement of "encoding/json"

Protocol Buffers for JavaScript (& TypeScript).

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

A handy swift json-object serialization/deserialization library

A proof-of-concept tool for generating payloads that exploit unsafe Java object deserialization.

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

HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.

A C++11 library for serialization

Python Data Structures for Humans™.

Kotlin multiplatform / multi-format serialization

Safely pass trusted data to untrusted environments and back.

Hprose is a cross-language RPC. This project is Hprose 2.0 for PHP

C++ Reflection Library

Java serialization library, proto compiler, code generator

Rust implementation of Google protocol buffers

FST: fast java serialization drop in-replacement

jsoniter (json-iterator) is fast and flexible JSON parser available in Java and Go

msgpack.org[Go] MessagePack encoding for Golang

YamlDotNet is a .NET library for YAML

Thriftpy has been deprecated, please migrate to https://github.com/Thriftpy/thriftpy2

Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code

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

Rusty Object Notation

Hprose is a cross-language RPC. This project is Hprose for Golang.

A Symfony Pack for Symfony Serializer

Quilt is a versioned data portal for S3